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flock bad file descriptor nfs
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flock bad file descriptor nfs
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flock bad file descriptor nfs
flock bad file descriptor nfs
Making statements based on opinion; back them up with references or personal experience. An attempt to lock the file using one of these file descriptors may be denied by a lock that the calling process has already placed via another file descriptor. Thanks in advance vmware-53.log CID Chain.zip Exchange Server 1.vmx 0 Kudos A process may hold only one type of lock (shared or exclusive) on a file. This is an fragment of the code I am using. You signed in with another tab or window. my_user belongs to admin . Well I can add a setting to put the lock in /tmp. https://github.com/ansible/awx/blob/4.0.0/awx/main/tasks.py#L1853. The problem is that it can't use flock on its lock files. But few files are showing this error Bad exchange descriptor Please let me know how to remove these files 3. Connect and share knowledge within a single location that is structured and easy to search. Can someone tell me the output of dpkg -l | grep nfs-common so I can use exactly the same version of the client code? Hi I am trying to install the docker-image of V2.0.0p9 on my docker-swarm setup with NFS for volumes. rev2022.12.11.43106. Yes. Asking for help, clarification, or responding to other answers. One downside is that this would not be safe when the home folder is mapped to two different machines, and vscode connects to those two machines simultaneously. Can I use user-based kerberos authentication with NFSv4? Resend (apologies, tried to send it to -users by mistake initially). I would like to clarify. File descriptor obtained using os.open() cannot be used in fcntl.flock() call when the file is on NFS mount. Sorry, I have to find time to set up an NFS drive and do some experimentation. To learn more, see our tips on writing great answers. Sign in A file descriptor is a unique number used to access a data resource. I use Windows Services for Unix 3 to activate the client. 127.0.0.1:/datadrive/shared on /mnt/shared type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1,local_lock=none,addr=127.0.0.1). with "Install from VSIX" command), Try again, this will keep the lock in /tmp, let me know whether it works. You cooperate by requesting the lock before doing the operation, and then by releasing the lock after you're done. The configuration: Built-in firewall is disabled and there is no third party firewall installed. how to do the experiment using the code in the Gist? vfat-0.04 file system spanning 1 partitions. touch resp.txt ( flock -e 200 curl 'someurl' -H 'someHeader' > resp.txt ) 200< resp.txt to place the lock on the file opened as read only. If the FD_CLOEXEC bit is not set, the file descriptor will remain open across an execve (2) . Already on GitHub? You can disable extensions.autoUpdate temporarily to prevent it from overwriting the vsix. I know, while I am doing this, an external process can update the fileName. Not clear if I have to find another locking solution entirely or what. https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-ssh-nightly, Make sure you uninstall the stable version before using the nightly version. What properties should my fictional HEAT rounds have to punch through heavy armor and ERA? I executed "exportfs -ra" on the host. Currently, only one such flag is defined: FD_CLOEXEC, the close-on-exec flag. Could @dawnmy and @saeedizadi also provide the information please? log: 2021-09-08T09:04:27.477115169Z ### PREPARE POSTFIX (Hostname: 19d7bab954cc, Relay host . Flock is the name of both a kernel level system call and a command line utility. macOS (OS X) can be setup as an NFS client to access shared files on the network. Our file locking is based on https://gist.github.com/przemoc/571091 if you care to do any experimentation yourself. Mine looks like. BSD locks (flock) The simplest and most common file locks are provided by flock (2). First of all you must determine disk device with vmkfs tool: ~ # vmkfstools -P /altbootbank. To get locking to work with nfs v4 and v3 you need to use byte range locking which is available as fcntl or lockf functions. SHARE COMMENTS I get the f. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. In Python, file descriptors are integers (positive) that identify the kernel's open files kept in a table of files. fcntl.flock(os.open()) does not work on NFS mount. That shouldn't be related to this. Thanks/ LIKITH.S Share 367 views Related Questions Related Tags We'll discuss it below. The vars.yml file The vars.yml file just keeps a list of the packages I want to install on each node. Maybe this is the reason that I was not able to open a folder after the connection was established. Unable to send; errno = Bad file descriptor $ syslog Oct 17 21:56:28 Estebans-MacBook-Pro-2 rpc.lockd[215] : can't contact statd, 100024 RPC: Timed out . Because I need to map this file on disk using mmap (), which requires a file descriptor. The idea is to avoid the file being written while a process is still reading it. 220325 17:01:45 41080 ssi_XrdSsiCtaServiceProvider: pid:41080 tid:139722695624832 XrdSsiCtaServiceProvider::Init(): cta::exception::Exception In BackendVFS::lockHelper(): Failed, to flock file /cta-store/ctaObjectStore/.AgentRegister-cta-objectstore-initialize-tpm102.desy.de-14808-20220325-12:05:30-0-0.lock: Bad file descriptor, BackendVFS::ScopedLock * BackendVFS::lockHelper(const std::string& name, int type, uint64_t timeout_us) {. I tried, Install it (e.g. Raw Receiving error "flock: 11: Bad file descriptor" on 7.4. Clone: 36% done.Failed to clone disk : Bad file descriptor (589833). The best answers are voted up and rise to the top, Not the answer you're looking for? And maybe dpkg -l | grep nfs-kernel-server if you have access to the server. It was updated form NFS3 to NFS4. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. The functionality is provided by an additional (external to nfs protocol) lock manager. Since Linux 2.6.12, NFS clients support flock () locks by emulating them as fcntl (2) byte-range locks on the entire file. Help us identify new roles for community members. You can open a new issue with some details. Is it appropriate to ignore emails from a student asking obvious questions? Can add that I am seeing this error on an Ubuntu 14.04.5 LTS server, which is mounting the home directory using nfs version 4.0. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The file is created in the specified NFS "path" . When I try to set lock on the file using the fcntl it fails with Permission denied. I would like to use a semaphore to avoid modifications on this file until I am done with it. You could set up a situatiion where one instance of the script acquires a lock and sleeps for a bit then a second instance of the script tries to acquire the lock and fails nicely with no weird error messages. I was able to mount with version 4.0 and it still works. I wonder whether it works because I am technically sharing to the same machine, maybe it takes some shortcut when it knows the drive is really local. Should I exit and re-enter EU with my EU passport or is it ok? HTML rendering created 2021-08-27 Could not establish SSH connection: flock: 99: Input/output error. And here is a test script is you can try running against your NFS $HOME. Thanks! Though the later one is what you're looking for, the POSIX API doesn't expose it, thus are not available for linux and unix. I was running dpkg -l | grep nfs-kernel-server on the remote machine, not on my local laptop. Hi all, I am observing an interesting issue with the OpenWRT build process when The nfs-client is a windows machine running NT Server. On the client I'd doing: Code: # mount -t nfs 10.100.100.12:/3wm storage mount: 10.100.100.12:/3wm failed, reason given by server: Permission denied mount: mounting 10.100.100.12:/3wm on storage failed: Bad file descriptor. We have tested the same code on both versions for nfsv3 and it fails with below error on RHEL 7.4 for nfs share. Now I am trying on 14.04 with 1:1.2.8-6ubuntu1.2 and it still seems fine. Disclaimer: Python is not my domain of expertise, I'm just a newbie hacking. It's the operation that is protected by the lock, not (necessarily) the lock file itself. This means that fcntl (2) and flock () locks do interact with one another over NFS. Can you provide more information about. What the exact command should I use? Finding the original ODE using a solution. So I set up an NFS drive for testing and I am able to use vscode remote on that drive with no issues , Can you run mount and share the line for the NFS drive? Linuxbrew / brew Public archive Notifications Fork 247 Star 2.6k Code Issues Pull requests Actions Wiki Security Insights Can't do anything -- "bad file descriptor" in lock.sh #314 Closed ( flock -x -n 100 || exit 55; sleep 100; ) 100> /tmp/foo.txt Now if you execute the above line in one terminal it will sleep for 100 seconds. Turning the sco machine into an nfs server instead of a client. I think the application's expectation is that it fail rather than returning a decimal-string-only service entity. A BSD lock and an Open file description lock is associated with a file object, while a POSIX record lock is associated with an [i-node, pid] pair. NFSv4 with Kerberos - idmap stops working after ~35 minutes, Parallel MPI_File_open failed on NFSv4 but ran on NFSv3. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. You could try running that script, and replace the /var/lock/ path with a path that is inside your user directory on the NFS drive I'm using NFS4. Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? @pmgurman Were you able to open folders on the remote machine and successfully re-connect to the remote for multiple times? 16 comments droundy commented on Oct 26, 2016 added a commit that referenced this issue added a commit to engine-flutter-autoroll/flutter that referenced this issue on Oct 17, 2018 mentioned this issue on Oct 17, 2018 Have a question about this project? Hi @roblourens Locks . author of We can probably live with that. Environment With advanced shells (bash, ksh93, zsh), the following can be done: Summary File descriptor obtained using open() cannot be used in flock() call when the file is on NFS mount. Same OS, same nfs-common version, same mount details. @roblourens Well occasionally send you account related emails. The only hint when I do print("%d",error) is 9 which should be "wrong file descriptor". maintainer of the mount:nfsmount failed: Bad file descriptor xiao.liang 15 years ago Hi, I have encoutered a problem when mount a nfs filesystem. Could not establish SSH connection to remote using Remote - SSH, Have to kill the vscode-server process for each SSH-connect [RHEL/CentOS 6.10] NFSv4. Already on GitHub? chown(2), The nfs server's ip is 192.168.1.6 and busybox version is 1.1.3. It should be run on the remote where the NFS drive is. Job fails because a file lock cannot be created on NFS folder. I was connecting to a remote machine using SSH-Remote. we have brought the pool online after scrubbing. You have answered my question. flockfile(3), NFS is the common for file sharing on NAS server and Linux / UNIX systems like, HP-UX, Solaris, Mac OS X, and others. This issue is particularly known for DataDomain storage. All the must configure features in busybox and kernel is turn on. Thanks for contributing an answer to Server Fault! For details of in-depth I was able to download the docker-image from the customer portal and upload it to my registry. privacy statement. . This means that you will be able to override the lock if you don't cooperate. I tried bash lockable_script_boilerplate.sh but got nothing in the output. And if you know the name of the command to mount the nfs drive, that would be helpful as well. This probably is not the "remote" machine that you are connecting to, that is the NFS client. great! This program was working perfectly until stop doing so. Did you run the test script on the remote machine? Bad file descriptor. @roblourens nightly version for me also working, thanks. Check the code of the locking test used by nfs developers (including myself) to validate client/server behavior independent of protocol version. Bad exchange descriptor : not able to remove files under zpool Hi , One of my zone went down and when i booted it up i could see the pool in degraded state with some check sum errors . fcntl(2), Since Linux 2.6.12, NFS clients support flock() locks by emulating them as byte-range locks on the entire file. The latter is simply a way to manage the systems calls from shell scripts or the command line. This problem started happening with NDK r21. fileName is supposed to be a valid existing file, I am reading a fileName and making a copy, editing some few parts. Any update on. lslocks(8), Copyright and license for this manual page. syscalls(2), The flock command works on file descriptors, not files. The following command will allow you to open a file descriptor in /etc/fstab. It works for the first time. @roblourens Forgive my ignorance, but where would I find the nightly? However, after the connection, it failed to open a folder on the server, showing the same error (flock: 99 Input/output error). [OpenWrt-Devel] Fwd: OpenWRT Build Process broken on recent Debian NFS Anton Ivanov anton.ivanov at cambridgegreys.com Sun Nov 12 02:41:39 EST 2017. And kernel's config CONFIG_NFS_FS, Open BackendVFS ObjectStore files in R/W mode when obtaining exclusive locks, (How one can reproduce the issue - this is very important). Can several CRTs be wired in parallel to one oscilloscope circuit? The text was updated successfully, but these errors were encountered: "Bad file descriptor" when trying to lock file on NFS mount. fsck(8), Closing File Descriptors. Here were my steps: Firstly edited the config.php in /var/www/fog/commons and reset the tftp password there and in the web gui interface. Some specific storages don't support flock () file locking with their NFS implementation so the workaround is to disable flock () on the mount with nolock parameter. Common errors we get with file descriptor limits: a) Fatal Error Unable to create lock file: Bad file descriptor (9) b) Too many open files (24) c) Unable to lock file I) Check default limit: $ ulimit -a default will be 1024. check global limit: $ cat /proc/sys/fs/file-max /usr/xxx -access=hostname I ran exportfs -av and /etc/xtab looks fine. Would like to stay longer than 90 days. because I had started working with an integer file descriptor instead of a file pointer. *br> /br> in the sudo mount -t dir. by Michael Kerrisk, Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Fix File reading failed-VLC could not open the file (Bad file descriptor)-file reading failed vlc. LIKE &. I found it updates to 0.44.2 after I connecting to the server. It fails with the following message: showmount: Cannot retrieve info from host: 192.168.16.51: RPC failed:: RPC: Unable to send; errno = Bad file descriptor I have done the following config on the server: /etc/exports /var/nfs 192.168.x.x/255.255.255. Subsequent flock() calls on an already locked file will convert an existing lock to the new lock mode. Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! Why do I do that? They are generally non-negative values. However it looks like the code is written to handle the case where all 100 iterations fail The Linux Programming Interface, dbopen(3), NFS v3 doesn't have a locking support on the protocol level. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How can you know the sky Rose saw when the Titanic sunk? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The main error is in flock () which still says "bad file descriptor" I am using open (), write () etc. Locking of CTA object store files fails on NFS mount. I was able to connect to the remote server. Do you have any ideas what is happening? . Check our new training course. Is this an at-all realistic configuration for a DHC-2 Beaver? Or your local laptop. cvs commit: apache-2./apache-nspr/os/win32 modules.c util_win32.c. Oh, I see. On another hand, NFS v4 has locking as a part of the spec. The mount command shows me the following about the mount, (rw,sec=sys,addr=x.x.x.x,clientaddr=0.0.0.0). Where does the idea of selling dragon parts come from? If my answer solved your question, please mark it as accepted answer Ready to optimize your JavaScript with Rust? The only difference, is the file system where the fileNames are located. I get the following from dpkg -l | grep nfs-common lockf(3), On macOS, the output-sync feature tries to lock the output file, but the file locking APIs don't work on a pipe. Which could be reason. Thanks! Any suggestion regarding this problem would be really helpful. *PATCH 000/104] virtiofs daemon [all] @ 2019-12-12 16:37 Dr. David Alan Gilbert (git) 2019-12-12 16:37 ` [PATCH 001/104] virtiofsd: Pull in upstream headers Dr. David Alan Gilbert (git) ` (106 more replies) 0 siblings, 107 replies; 307+ messages in thread From: Dr. David Alan Gilbert (git) @ 2019-12-12 16:37 UTC (permalink / raw) To: qemu-devel, stefanha, vgoyal From: "Dr. David Alan Gilbert . cryptsetup(8), *RFC PATCH 0/7] crypto: x86 - fix RCU stalls @ 2022-10-06 22:31 Robert Elliott 2022-10-06 22:31 ` [RFC PATCH 1/7] rcu: correct CONFIG_EXT_RCU_CPU_STALL_TIMEOUT descriptions Robert Elliott ` (7 more replies) 0 siblings, 8 replies; 125+ messages in thread From: Robert Elliott @ 2022-10-06 22:31 UTC (permalink / raw) To: herbert, davem . *br> Sumake the installation by typing umount -l /etc/fstab. This means that fcntl(2) and flock() locks do interact with one another over NFS. Moreover the hardcoded file descriptor may already be used. I also reproduced the connection several times and there was no error. Would that work? Linux debugging, tracing, profiling & perf. Can really only tell you that the lock failed or succeeded but not why. system msg for write_line failure: Bad file descriptor I am wondering if anyone has any experience on how to solve this issue. Therefore you need to take decision on the return code of flock as below. I'm happy to help out. Attached is a test script which shows the difference is run on both RHEL versions. It works with a Centos 7.6 server using nfs version 4.1 with the same home directory. analysis. NAME | SYNOPSIS | DESCRIPTION | RETURNVALUE | ERRORS | CONFORMINGTO | NOTES | SEEALSO | COLOPHON, Pages that refer to this page: The file is created in the specified NFS "path" . ret->set(::open(path.c_str(), flag), path); - int fd=::open(path.c_str(), O_RDONLY | O_CREAT, S_IRWXU | S_IRGRP | S_IROTH); + int fd=::open(path.c_str(), flag | O_CREAT, S_IRWXU | S_IRGRP | S_IROTH). Originally locks were in /var/lock but on some systems users do not have write access to /var/lock. My issue was slightly different. It only takes a minute to sign up. Apple: Issues sharing folder through NFS - RPC: Unable to send; errno = Bad file descriptor or Program not registeredHelpful? You signed in with another tab or window. vim, htop, and tmux are my favorite packages to install on each machine I need to manage. I have a .bash_profile file that is normally read. What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. Some shells do not support file descriptors larger than 9. CONFIG_FEATURE_MOUNT_NFS is set to y. FLOCK(2) Linux Programmer's Manual FLOCK(2), Linux 2021-03-22 FLOCK(2). I got a pop-up window showing Could not establish connection to "xxxx.yyyy.zzz". Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. Uninstall the ssh extension Download this, change extension .vsix remote-ssh-.44.1.zip . @roblourens Thanks. This works for me. data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKAAAAB4CAYAAAB1ovlvAAAAAXNSR0IArs4c6QAAAnpJREFUeF7t17Fpw1AARdFv7WJN4EVcawrPJZeeR3u4kiGQkCYJaXxBHLUSPHT/AaHTvu . signal(7), Please support me on Patreon: . I had to move the openwrt tree to a local filesystem to be able to compile. To solve this problem, here are the steps to increase this limit. Try: flock -e myfile.lock ls The number is the file descriptor of the usage alternativ: ( flock -e 200 ls ) 200>myfile.lock See the man page. Instead, one could use fcntl (2) byte-range locking, which does work over NFS, given a sufficiently recent version of Linux and a server which supports locking. 2 comments patrikbeno commented on May 20, 2019 AWX version: 4.0.0 AWX install method: kubernetes Ansible version: ansible-2.8.-1.el7.ans.noarch 1 awxbot added state:needs_triage type:bug labels on May 20, 2019 You should alter it to report the errno reason for the failure as it might indicate a more fundamental issue with your locking -- such as trying to open a file you dont have permission to or doesn't exist. Do you know which NFS you are using? You're trying to compile in an NFS mounted directory, right? Can confirm that above script causes the original error on the 'exlock_now || exit 1' line (and severs my ssh connection). GitHub This repository has been archived by the owner. You could try running that script, and replace the, What the exact command should I use? This is more reliable on some filesystems, Ansible version: ansible-2.8.0-1.el7.ans.noarch. Dual EU/US Citizen entered EU on US Passport. I hope someone can help. getrlimit(2), The command is missing. By clicking Sign up for GitHub, you agree to our terms of service and Does illicit payments qualify as transaction costs? If I disconnect from the server and re-connect again, I got the same error. Network File System (NFS), a distributed file system protocol developed by Sun Microsystems. with Creative Commons CC-BY-SA You can see this by using strace, that's how I discovered it. I mean, the "server" in this case is the file server that hosts your NFS directory. UNIX Linux Unix POSIX [ ] I/O POSIX UNIXLinux Any workaround? UUID: 0xxxxxe. nfs(5), I just checked the manpage of flock, in the NOTES section comes the important part: You only opened the file for reading, which is the reason why the flock call fails. You will probably get the same error, I just want to verify that the simplest possible case produces the same result. I must read the man page. Using this VSIX extension I successfully connected to the remote machine and opened project folders. They assist in performing various functions related to files. Destination disk format: VMFS thick Cloning disk 'Exchange Server 1-000001.vmdk'. Re: NFS stale file descriptor and close () The OS will definitely close and release the file descriptors when exit () is called, however, this application must continue running after close () has been called file from a disconnected mountpoint. The same code works on other flavors of unix (solaris and HPUX) . Linux man-pages project. There is no output for dpkg -l | grep nfs-kernel-server. sudo netstat -an | grep socket *br>. NFS flock functionality appears to have changed between RHEL 7.3 and 7.4. The text was updated successfully, but these errors were encountered: Hi @roblourens , yes I'm using the NFS file system. File system label (if any): Mode: private. Well you should not get this input/output error. proc(5), My /etc/exports looks like this. But maybe the lockfiles should just be stored in /var/lock. You should print the errno (as suggested by others) to see why the lock request had failed. Note. @roblourens One side effect I am seeing of remote.SSH.lockfilesInTmp is that when I start a terminal on the remote machine it does not load my bash settings from my home folder, i.e. If the FD_CLOEXEC bit is set, the file descriptor will automatically be closed during a successful execve (2). Tomorrow's nightly build of the ssh extension will have the setting remote.SSH.lockfilesInTmp that you can set to do the same thing. Next if you run the code on another terminal it will immediately return to prompt. I'm suffering this issue so much. Why do quantum objects slow down when volume increases? @pmgurman How did you prevent the extension keeping updating itself? It is now read-only. flock does advisory locking, which is a cooperative locking scheme. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company. Japanese girlfriend visiting me in Canada - questions at border control? (If the execve (2) fails, the file descriptor is left open.) tmpfiles.d(5), In my case, I don't believe its the nfs host, because I can use the extension to go to a different computer that mounts the same home directory. I don't know why this code is not working under NFS4, using NFS3 works perfectly. Sorry, should have double-checked before posting. Have a question about this project? flock(1), You may also want to include errno.h in the list of includes too to make sure you reach for the correct variable. Gradle captures the output of ndk-build (probably using a pipe), and I see the errors with either Android Studio or running ./gradlew at the CLI, but only if I configure gradle to pass -jN . @roblourens I've tried different settings in the /etc/exports file. Use lockf instead of flock. It also means that in order to place an exclusive lock, the file must be opened for writing. this? (ro,no_subtree_check) /etc/hosts.allow portmap: 192.168.x.x/255.255.255. I assume that /var/lock is not an NFS drive for you correct? Well occasionally send you account related emails. One is the byte range locks, the second is the access share. Even the OS (SLE15.2) is the same with kernel 5.3.18, and using strerror(errno) produces a seg fault on NFS4. Under our NFS4-Installation I always get into this condition, Edit: I guess it is updating itself on restart of VSCode, and updating from the internet and not the modified package version. However it takes an extremely long time to untar the downloaded package For dpkg -l | grep nfs-kernel-server I meant run that on the server, if you have access to it. Since the application may move on at a later point and open new . I would like to debug, but our sys-admin is not able to. Capacity 261853184 (63929 file blocks * 4096), 78376960 (19135 blocks) avail. Therefore, exit () is never called. @arglog I was just about to say the same. It worked after installing nightly version of remote SSH extension and checking "Lockfiles In Tmp". thank you. Did neanderthals need vitamin C from the diet? Features: not specified in POSIX, but widely available on various Unix systems LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 3.16 000/294] 3.16.50-rc1 review [PATCH 3.16 000/294] 3.16.50-rc1 review to your account. fcntl.flock(open()) does work, or at least does not fail. Reset the values manually in the aforementioned config file for STORAGE_DATADIR & STORAGE_DATADIR_UPLOAD. i get a lot of "[Errno 9] Bad file descriptor". Linux/UNIX system programming training courses Any suggestion regarding this problem would be really helpful. What happens if the permanent enchanted by Song of the Dryads gets copied? Sign in Sorry I should have bumped the version number to prevent that. Server Fault is a question and answer site for system and network administrators. The others are required by Kubernetes: --PACKAGES: - vim - htop - tmux - kubelet - kubeadm - kubectl - kubernetes-cni - docker.io Mount NFS folder on /var/lib/awx/projects. But there is no output. Below is my namelist: &nhyd_model config_init_case = 7 config_start_time='2019-8-16_00:00:00' / &dimensions config_nvertlevels=41 config_nsoillevels=4 config_nfglevels=38 config_nfgsoillevels=4 / &data_sources LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [RFC][PATCH 0/9] File descriptor hot-unplug support @ 2009-04-11 12:01 Eric W. Biederman 2009-04-11 12:03 ` [RFC][PATCH 1/9] mm: Introduce remap_file_mappings Eric W. Biederman ` (11 more replies) 0 siblings, 12 replies; 99+ messages in thread From: Eric W. Biederman @ 2009-04-11 12:01 UTC (permalink / raw Yes, I ran the test script on the remote machine. Solution Use the following command to mount NFS: ii nfs-common 1:1.2.8-6ubuntu1.2 amd64 NFS support files common to client and server. Attached you'll find some screenshots of informations I collected about the CID chain and logs. privacy statement. It was hard to test though because it kept updating itself before I could test it and I kept forgetting that there were hanging processes on the remote from previous attempts. http://git.linux-nfs.org/?p=steved/cthon04.git;a=blob;f=lock/tlock.c;h=8c837a87976d17c58a25c9bd08d9f935e4521402;hb=HEAD#l835. Thanks/ LIKITH.S Share 356 views Related Questions Related Tags If it doesn't help, then please change nfsvers=4 to nfsvers=3, it should help. I think I read that flock should be supported on NFSv4. dgaudet 22 Sep 1998 18:06:03 -0000 With over 10 pre-installed distros to choose from, the worry-free installation life is here! By clicking Sign up for GitHub, you agree to our terms of service and to your account. that I teach, look here. Moreover, there are two types of locks. File descriptor obtained using open() cannot be used in flock() call when the file is on NFS mount. Since Linux 2.6.37, the kernel supports a compatibility mode that allows flock() locks . All jobs that try to create a project lock in this folder will fail with: awx/main/tasks.py", line 1865, in acquire_lock fcntl.flock(self.lock_fd, fcntl.LOCK_EX | fcntl.LOCK_NB) OSError: [Errno 9] Bad file descriptor. The manual page flock(2) had been out of date for a long time, but has since been updated to say (emphasis mine):. I didn't know if I should post this here or in a new issue, so apologies if it is in the wrong spot? Use the following command to open a network socket file descriptor. The same code works on other flavors of unix (solaris and HPUX) . When I try to set lock on the file using the fcntl it fails with Permission denied. I'm using Mac OS High Sierra 10.13, and I'm facing some issues sharing a folder through NFS. Only after uninstalling and re-installing the extension can I successfully connect to the server again. I don't have the access to the server hosting the NFS directory. If found to be negative, that indicates error or a "no value" condition. But no change: /proc/fs/nfs/exports remains empty and the client reports the same . checked the values matching in the web gui as well. NFS details In Linux kernels up to 2.6.11, flock () does not lock files over NFS (i.e., the scope of locks was limited to the local system). You could change the path in the script to somewhere in /tmp to test. Previous message (by thread): [OpenWrt-Devel] Fwd: OpenWRT Build Process broken on recent Debian NFS Next message (by thread): [OpenWrt-Devel] Fwd: OpenWRT Build Process broken on recent Debian NFS . fork(2), IBM's technical support site for all IBM products and services including self help and the ability to engage with IBM support engineers. 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Making statements based on opinion; back them up with references or personal experience. An attempt to lock the file using one of these file descriptors may be denied by a lock that the calling process has already placed via another file descriptor. Thanks in advance vmware-53.log CID Chain.zip Exchange Server 1.vmx 0 Kudos A process may hold only one type of lock (shared or exclusive) on a file. This is an fragment of the code I am using. You signed in with another tab or window. my_user belongs to admin . Well I can add a setting to put the lock in /tmp. https://github.com/ansible/awx/blob/4.0.0/awx/main/tasks.py#L1853. The problem is that it can't use flock on its lock files. But few files are showing this error Bad exchange descriptor Please let me know how to remove these files 3. Connect and share knowledge within a single location that is structured and easy to search. Can someone tell me the output of dpkg -l | grep nfs-common so I can use exactly the same version of the client code? Hi I am trying to install the docker-image of V2.0.0p9 on my docker-swarm setup with NFS for volumes. rev2022.12.11.43106. Yes. Asking for help, clarification, or responding to other answers. One downside is that this would not be safe when the home folder is mapped to two different machines, and vscode connects to those two machines simultaneously. Can I use user-based kerberos authentication with NFSv4? Resend (apologies, tried to send it to -users by mistake initially). I would like to clarify. File descriptor obtained using os.open() cannot be used in fcntl.flock() call when the file is on NFS mount. Sorry, I have to find time to set up an NFS drive and do some experimentation. To learn more, see our tips on writing great answers. Sign in A file descriptor is a unique number used to access a data resource. I use Windows Services for Unix 3 to activate the client. 127.0.0.1:/datadrive/shared on /mnt/shared type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1,local_lock=none,addr=127.0.0.1). with "Install from VSIX" command), Try again, this will keep the lock in /tmp, let me know whether it works. You cooperate by requesting the lock before doing the operation, and then by releasing the lock after you're done. The configuration: Built-in firewall is disabled and there is no third party firewall installed. how to do the experiment using the code in the Gist? vfat-0.04 file system spanning 1 partitions. touch resp.txt ( flock -e 200 curl 'someurl' -H 'someHeader' > resp.txt ) 200< resp.txt to place the lock on the file opened as read only. If the FD_CLOEXEC bit is not set, the file descriptor will remain open across an execve (2) . Already on GitHub? You can disable extensions.autoUpdate temporarily to prevent it from overwriting the vsix. I know, while I am doing this, an external process can update the fileName. Not clear if I have to find another locking solution entirely or what. https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-ssh-nightly, Make sure you uninstall the stable version before using the nightly version. What properties should my fictional HEAT rounds have to punch through heavy armor and ERA? I executed "exportfs -ra" on the host. Currently, only one such flag is defined: FD_CLOEXEC, the close-on-exec flag. Could @dawnmy and @saeedizadi also provide the information please? log: 2021-09-08T09:04:27.477115169Z ### PREPARE POSTFIX (Hostname: 19d7bab954cc, Relay host . Flock is the name of both a kernel level system call and a command line utility. macOS (OS X) can be setup as an NFS client to access shared files on the network. Our file locking is based on https://gist.github.com/przemoc/571091 if you care to do any experimentation yourself. Mine looks like. BSD locks (flock) The simplest and most common file locks are provided by flock (2). First of all you must determine disk device with vmkfs tool: ~ # vmkfstools -P /altbootbank. To get locking to work with nfs v4 and v3 you need to use byte range locking which is available as fcntl or lockf functions. SHARE COMMENTS I get the f. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. In Python, file descriptors are integers (positive) that identify the kernel's open files kept in a table of files. fcntl.flock(os.open()) does not work on NFS mount. That shouldn't be related to this. Thanks/ LIKITH.S Share 367 views Related Questions Related Tags We'll discuss it below. The vars.yml file The vars.yml file just keeps a list of the packages I want to install on each node. Maybe this is the reason that I was not able to open a folder after the connection was established. Unable to send; errno = Bad file descriptor $ syslog Oct 17 21:56:28 Estebans-MacBook-Pro-2 rpc.lockd[215] : can't contact statd, 100024 RPC: Timed out . Because I need to map this file on disk using mmap (), which requires a file descriptor. The idea is to avoid the file being written while a process is still reading it. 220325 17:01:45 41080 ssi_XrdSsiCtaServiceProvider: pid:41080 tid:139722695624832 XrdSsiCtaServiceProvider::Init(): cta::exception::Exception In BackendVFS::lockHelper(): Failed, to flock file /cta-store/ctaObjectStore/.AgentRegister-cta-objectstore-initialize-tpm102.desy.de-14808-20220325-12:05:30-0-0.lock: Bad file descriptor, BackendVFS::ScopedLock * BackendVFS::lockHelper(const std::string& name, int type, uint64_t timeout_us) {. I tried, Install it (e.g. Raw Receiving error "flock: 11: Bad file descriptor" on 7.4. Clone: 36% done.Failed to clone disk : Bad file descriptor (589833). The best answers are voted up and rise to the top, Not the answer you're looking for? And maybe dpkg -l | grep nfs-kernel-server if you have access to the server. It was updated form NFS3 to NFS4. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. The functionality is provided by an additional (external to nfs protocol) lock manager. Since Linux 2.6.12, NFS clients support flock () locks by emulating them as fcntl (2) byte-range locks on the entire file. Help us identify new roles for community members. You can open a new issue with some details. Is it appropriate to ignore emails from a student asking obvious questions? Can add that I am seeing this error on an Ubuntu 14.04.5 LTS server, which is mounting the home directory using nfs version 4.0. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The file is created in the specified NFS "path" . When I try to set lock on the file using the fcntl it fails with Permission denied. I would like to use a semaphore to avoid modifications on this file until I am done with it. You could set up a situatiion where one instance of the script acquires a lock and sleeps for a bit then a second instance of the script tries to acquire the lock and fails nicely with no weird error messages. I was able to mount with version 4.0 and it still works. I wonder whether it works because I am technically sharing to the same machine, maybe it takes some shortcut when it knows the drive is really local. Should I exit and re-enter EU with my EU passport or is it ok? HTML rendering created 2021-08-27 Could not establish SSH connection: flock: 99: Input/output error. And here is a test script is you can try running against your NFS $HOME. Thanks! Though the later one is what you're looking for, the POSIX API doesn't expose it, thus are not available for linux and unix. I was running dpkg -l | grep nfs-kernel-server on the remote machine, not on my local laptop. Hi all, I am observing an interesting issue with the OpenWRT build process when The nfs-client is a windows machine running NT Server. On the client I'd doing: Code: # mount -t nfs 10.100.100.12:/3wm storage mount: 10.100.100.12:/3wm failed, reason given by server: Permission denied mount: mounting 10.100.100.12:/3wm on storage failed: Bad file descriptor. We have tested the same code on both versions for nfsv3 and it fails with below error on RHEL 7.4 for nfs share. Now I am trying on 14.04 with 1:1.2.8-6ubuntu1.2 and it still seems fine. Disclaimer: Python is not my domain of expertise, I'm just a newbie hacking. It's the operation that is protected by the lock, not (necessarily) the lock file itself. This means that fcntl (2) and flock () locks do interact with one another over NFS. Can you provide more information about. What the exact command should I use? Finding the original ODE using a solution. So I set up an NFS drive for testing and I am able to use vscode remote on that drive with no issues , Can you run mount and share the line for the NFS drive? Linuxbrew / brew Public archive Notifications Fork 247 Star 2.6k Code Issues Pull requests Actions Wiki Security Insights Can't do anything -- "bad file descriptor" in lock.sh #314 Closed ( flock -x -n 100 || exit 55; sleep 100; ) 100> /tmp/foo.txt Now if you execute the above line in one terminal it will sleep for 100 seconds. Turning the sco machine into an nfs server instead of a client. I think the application's expectation is that it fail rather than returning a decimal-string-only service entity. A BSD lock and an Open file description lock is associated with a file object, while a POSIX record lock is associated with an [i-node, pid] pair. NFSv4 with Kerberos - idmap stops working after ~35 minutes, Parallel MPI_File_open failed on NFSv4 but ran on NFSv3. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. You could try running that script, and replace the /var/lock/ path with a path that is inside your user directory on the NFS drive I'm using NFS4. Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? @pmgurman Were you able to open folders on the remote machine and successfully re-connect to the remote for multiple times? 16 comments droundy commented on Oct 26, 2016 added a commit that referenced this issue added a commit to engine-flutter-autoroll/flutter that referenced this issue on Oct 17, 2018 mentioned this issue on Oct 17, 2018 Have a question about this project? Hi @roblourens Locks . author of We can probably live with that. Environment With advanced shells (bash, ksh93, zsh), the following can be done: Summary File descriptor obtained using open() cannot be used in flock() call when the file is on NFS mount. Same OS, same nfs-common version, same mount details. @roblourens Well occasionally send you account related emails. The only hint when I do print("%d",error) is 9 which should be "wrong file descriptor". maintainer of the mount:nfsmount failed: Bad file descriptor xiao.liang 15 years ago Hi, I have encoutered a problem when mount a nfs filesystem. Could not establish SSH connection to remote using Remote - SSH, Have to kill the vscode-server process for each SSH-connect [RHEL/CentOS 6.10] NFSv4. Already on GitHub? chown(2), The nfs server's ip is 192.168.1.6 and busybox version is 1.1.3. It should be run on the remote where the NFS drive is. Job fails because a file lock cannot be created on NFS folder. I was connecting to a remote machine using SSH-Remote. we have brought the pool online after scrubbing. You have answered my question. flockfile(3), NFS is the common for file sharing on NAS server and Linux / UNIX systems like, HP-UX, Solaris, Mac OS X, and others. This issue is particularly known for DataDomain storage. All the must configure features in busybox and kernel is turn on. Thanks for contributing an answer to Server Fault! For details of in-depth I was able to download the docker-image from the customer portal and upload it to my registry. privacy statement. . This means that you will be able to override the lock if you don't cooperate. I tried bash lockable_script_boilerplate.sh but got nothing in the output. And if you know the name of the command to mount the nfs drive, that would be helpful as well. This probably is not the "remote" machine that you are connecting to, that is the NFS client. great! This program was working perfectly until stop doing so. Did you run the test script on the remote machine? Bad file descriptor. @roblourens nightly version for me also working, thanks. Check the code of the locking test used by nfs developers (including myself) to validate client/server behavior independent of protocol version. Bad exchange descriptor : not able to remove files under zpool Hi , One of my zone went down and when i booted it up i could see the pool in degraded state with some check sum errors . fcntl(2), Since Linux 2.6.12, NFS clients support flock() locks by emulating them as byte-range locks on the entire file. The latter is simply a way to manage the systems calls from shell scripts or the command line. This problem started happening with NDK r21. fileName is supposed to be a valid existing file, I am reading a fileName and making a copy, editing some few parts. Any update on. lslocks(8), Copyright and license for this manual page. syscalls(2), The flock command works on file descriptors, not files. The following command will allow you to open a file descriptor in /etc/fstab. It works for the first time. @roblourens Forgive my ignorance, but where would I find the nightly? However, after the connection, it failed to open a folder on the server, showing the same error (flock: 99 Input/output error). [OpenWrt-Devel] Fwd: OpenWRT Build Process broken on recent Debian NFS Anton Ivanov anton.ivanov at cambridgegreys.com Sun Nov 12 02:41:39 EST 2017. And kernel's config CONFIG_NFS_FS, Open BackendVFS ObjectStore files in R/W mode when obtaining exclusive locks, (How one can reproduce the issue - this is very important). Can several CRTs be wired in parallel to one oscilloscope circuit? The text was updated successfully, but these errors were encountered: "Bad file descriptor" when trying to lock file on NFS mount. fsck(8), Closing File Descriptors. Here were my steps: Firstly edited the config.php in /var/www/fog/commons and reset the tftp password there and in the web gui interface. Some specific storages don't support flock () file locking with their NFS implementation so the workaround is to disable flock () on the mount with nolock parameter. Common errors we get with file descriptor limits: a) Fatal Error Unable to create lock file: Bad file descriptor (9) b) Too many open files (24) c) Unable to lock file I) Check default limit: $ ulimit -a default will be 1024. check global limit: $ cat /proc/sys/fs/file-max /usr/xxx -access=hostname I ran exportfs -av and /etc/xtab looks fine. Would like to stay longer than 90 days. because I had started working with an integer file descriptor instead of a file pointer. *br> /br> in the sudo mount -t dir. by Michael Kerrisk, Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Fix File reading failed-VLC could not open the file (Bad file descriptor)-file reading failed vlc. LIKE &. I found it updates to 0.44.2 after I connecting to the server. It fails with the following message: showmount: Cannot retrieve info from host: 192.168.16.51: RPC failed:: RPC: Unable to send; errno = Bad file descriptor I have done the following config on the server: /etc/exports /var/nfs 192.168.x.x/255.255.255. Subsequent flock() calls on an already locked file will convert an existing lock to the new lock mode. Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! Why do I do that? They are generally non-negative values. However it looks like the code is written to handle the case where all 100 iterations fail The Linux Programming Interface, dbopen(3), NFS v3 doesn't have a locking support on the protocol level. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How can you know the sky Rose saw when the Titanic sunk? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The main error is in flock () which still says "bad file descriptor" I am using open (), write () etc. Locking of CTA object store files fails on NFS mount. I was able to connect to the remote server. Do you have any ideas what is happening? . Check our new training course. Is this an at-all realistic configuration for a DHC-2 Beaver? Or your local laptop. cvs commit: apache-2./apache-nspr/os/win32 modules.c util_win32.c. Oh, I see. On another hand, NFS v4 has locking as a part of the spec. The mount command shows me the following about the mount, (rw,sec=sys,addr=x.x.x.x,clientaddr=0.0.0.0). Where does the idea of selling dragon parts come from? If my answer solved your question, please mark it as accepted answer Ready to optimize your JavaScript with Rust? The only difference, is the file system where the fileNames are located. I get the following from dpkg -l | grep nfs-common lockf(3), On macOS, the output-sync feature tries to lock the output file, but the file locking APIs don't work on a pipe. Which could be reason. Thanks! Any suggestion regarding this problem would be really helpful. *PATCH 000/104] virtiofs daemon [all] @ 2019-12-12 16:37 Dr. David Alan Gilbert (git) 2019-12-12 16:37 ` [PATCH 001/104] virtiofsd: Pull in upstream headers Dr. David Alan Gilbert (git) ` (106 more replies) 0 siblings, 107 replies; 307+ messages in thread From: Dr. David Alan Gilbert (git) @ 2019-12-12 16:37 UTC (permalink / raw) To: qemu-devel, stefanha, vgoyal From: "Dr. David Alan Gilbert . cryptsetup(8), *RFC PATCH 0/7] crypto: x86 - fix RCU stalls @ 2022-10-06 22:31 Robert Elliott 2022-10-06 22:31 ` [RFC PATCH 1/7] rcu: correct CONFIG_EXT_RCU_CPU_STALL_TIMEOUT descriptions Robert Elliott ` (7 more replies) 0 siblings, 8 replies; 125+ messages in thread From: Robert Elliott @ 2022-10-06 22:31 UTC (permalink / raw) To: herbert, davem . *br> Sumake the installation by typing umount -l /etc/fstab. This means that fcntl(2) and flock() locks do interact with one another over NFS. Moreover the hardcoded file descriptor may already be used. I also reproduced the connection several times and there was no error. Would that work? Linux debugging, tracing, profiling & perf. Can really only tell you that the lock failed or succeeded but not why. system msg for write_line failure: Bad file descriptor I am wondering if anyone has any experience on how to solve this issue. Therefore you need to take decision on the return code of flock as below. I'm happy to help out. Attached is a test script which shows the difference is run on both RHEL versions. It works with a Centos 7.6 server using nfs version 4.1 with the same home directory. analysis. NAME | SYNOPSIS | DESCRIPTION | RETURNVALUE | ERRORS | CONFORMINGTO | NOTES | SEEALSO | COLOPHON, Pages that refer to this page: The file is created in the specified NFS "path" . ret->set(::open(path.c_str(), flag), path); - int fd=::open(path.c_str(), O_RDONLY | O_CREAT, S_IRWXU | S_IRGRP | S_IROTH); + int fd=::open(path.c_str(), flag | O_CREAT, S_IRWXU | S_IRGRP | S_IROTH). Originally locks were in /var/lock but on some systems users do not have write access to /var/lock. My issue was slightly different. It only takes a minute to sign up. Apple: Issues sharing folder through NFS - RPC: Unable to send; errno = Bad file descriptor or Program not registeredHelpful? You signed in with another tab or window. vim, htop, and tmux are my favorite packages to install on each machine I need to manage. I have a .bash_profile file that is normally read. What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. Some shells do not support file descriptors larger than 9. CONFIG_FEATURE_MOUNT_NFS is set to y. FLOCK(2) Linux Programmer's Manual FLOCK(2), Linux 2021-03-22 FLOCK(2). I got a pop-up window showing Could not establish connection to "xxxx.yyyy.zzz". Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. Uninstall the ssh extension Download this, change extension .vsix remote-ssh-.44.1.zip . @roblourens Thanks. This works for me. data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKAAAAB4CAYAAAB1ovlvAAAAAXNSR0IArs4c6QAAAnpJREFUeF7t17Fpw1AARdFv7WJN4EVcawrPJZeeR3u4kiGQkCYJaXxBHLUSPHT/AaHTvu . signal(7), Please support me on Patreon: . I had to move the openwrt tree to a local filesystem to be able to compile. To solve this problem, here are the steps to increase this limit. Try: flock -e myfile.lock ls The number is the file descriptor of the usage alternativ: ( flock -e 200 ls ) 200>myfile.lock See the man page. Instead, one could use fcntl (2) byte-range locking, which does work over NFS, given a sufficiently recent version of Linux and a server which supports locking. 2 comments patrikbeno commented on May 20, 2019 AWX version: 4.0.0 AWX install method: kubernetes Ansible version: ansible-2.8.-1.el7.ans.noarch 1 awxbot added state:needs_triage type:bug labels on May 20, 2019 You should alter it to report the errno reason for the failure as it might indicate a more fundamental issue with your locking -- such as trying to open a file you dont have permission to or doesn't exist. Do you know which NFS you are using? You're trying to compile in an NFS mounted directory, right? Can confirm that above script causes the original error on the 'exlock_now || exit 1' line (and severs my ssh connection). GitHub This repository has been archived by the owner. You could try running that script, and replace the, What the exact command should I use? This is more reliable on some filesystems, Ansible version: ansible-2.8.0-1.el7.ans.noarch. Dual EU/US Citizen entered EU on US Passport. I hope someone can help. getrlimit(2), The command is missing. By clicking Sign up for GitHub, you agree to our terms of service and Does illicit payments qualify as transaction costs? If I disconnect from the server and re-connect again, I got the same error. Network File System (NFS), a distributed file system protocol developed by Sun Microsystems. with Creative Commons CC-BY-SA You can see this by using strace, that's how I discovered it. I mean, the "server" in this case is the file server that hosts your NFS directory. UNIX Linux Unix POSIX [ ] I/O POSIX UNIXLinux Any workaround? UUID: 0xxxxxe. nfs(5), I just checked the manpage of flock, in the NOTES section comes the important part: You only opened the file for reading, which is the reason why the flock call fails. You will probably get the same error, I just want to verify that the simplest possible case produces the same result. I must read the man page. Using this VSIX extension I successfully connected to the remote machine and opened project folders. They assist in performing various functions related to files. Destination disk format: VMFS thick Cloning disk 'Exchange Server 1-000001.vmdk'. Re: NFS stale file descriptor and close () The OS will definitely close and release the file descriptors when exit () is called, however, this application must continue running after close () has been called file from a disconnected mountpoint. The same code works on other flavors of unix (solaris and HPUX) . Linux man-pages project. There is no output for dpkg -l | grep nfs-kernel-server. sudo netstat -an | grep socket *br>. NFS flock functionality appears to have changed between RHEL 7.3 and 7.4. The text was updated successfully, but these errors were encountered: Hi @roblourens , yes I'm using the NFS file system. File system label (if any): Mode: private. Well you should not get this input/output error. proc(5), My /etc/exports looks like this. But maybe the lockfiles should just be stored in /var/lock. You should print the errno (as suggested by others) to see why the lock request had failed. Note. @roblourens One side effect I am seeing of remote.SSH.lockfilesInTmp is that when I start a terminal on the remote machine it does not load my bash settings from my home folder, i.e. If the FD_CLOEXEC bit is set, the file descriptor will automatically be closed during a successful execve (2). Tomorrow's nightly build of the ssh extension will have the setting remote.SSH.lockfilesInTmp that you can set to do the same thing. Next if you run the code on another terminal it will immediately return to prompt. I'm suffering this issue so much. Why do quantum objects slow down when volume increases? @pmgurman How did you prevent the extension keeping updating itself? It is now read-only. flock does advisory locking, which is a cooperative locking scheme. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company. Japanese girlfriend visiting me in Canada - questions at border control? (If the execve (2) fails, the file descriptor is left open.) tmpfiles.d(5), In my case, I don't believe its the nfs host, because I can use the extension to go to a different computer that mounts the same home directory. I don't know why this code is not working under NFS4, using NFS3 works perfectly. Sorry, should have double-checked before posting. Have a question about this project? flock(1), You may also want to include errno.h in the list of includes too to make sure you reach for the correct variable. Gradle captures the output of ndk-build (probably using a pipe), and I see the errors with either Android Studio or running ./gradlew at the CLI, but only if I configure gradle to pass -jN . @roblourens I've tried different settings in the /etc/exports file. Use lockf instead of flock. It also means that in order to place an exclusive lock, the file must be opened for writing. this? (ro,no_subtree_check) /etc/hosts.allow portmap: 192.168.x.x/255.255.255. I assume that /var/lock is not an NFS drive for you correct? Well occasionally send you account related emails. One is the byte range locks, the second is the access share. Even the OS (SLE15.2) is the same with kernel 5.3.18, and using strerror(errno) produces a seg fault on NFS4. Under our NFS4-Installation I always get into this condition, Edit: I guess it is updating itself on restart of VSCode, and updating from the internet and not the modified package version. However it takes an extremely long time to untar the downloaded package For dpkg -l | grep nfs-kernel-server I meant run that on the server, if you have access to it. Since the application may move on at a later point and open new . I would like to debug, but our sys-admin is not able to. Capacity 261853184 (63929 file blocks * 4096), 78376960 (19135 blocks) avail. Therefore, exit () is never called. @arglog I was just about to say the same. It worked after installing nightly version of remote SSH extension and checking "Lockfiles In Tmp". thank you. Did neanderthals need vitamin C from the diet? Features: not specified in POSIX, but widely available on various Unix systems LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 3.16 000/294] 3.16.50-rc1 review [PATCH 3.16 000/294] 3.16.50-rc1 review to your account. fcntl.flock(open()) does work, or at least does not fail. Reset the values manually in the aforementioned config file for STORAGE_DATADIR & STORAGE_DATADIR_UPLOAD. i get a lot of "[Errno 9] Bad file descriptor". Linux/UNIX system programming training courses Any suggestion regarding this problem would be really helpful. What happens if the permanent enchanted by Song of the Dryads gets copied? Sign in Sorry I should have bumped the version number to prevent that. Server Fault is a question and answer site for system and network administrators. The others are required by Kubernetes: --PACKAGES: - vim - htop - tmux - kubelet - kubeadm - kubectl - kubernetes-cni - docker.io Mount NFS folder on /var/lib/awx/projects. But there is no output. Below is my namelist: &nhyd_model config_init_case = 7 config_start_time='2019-8-16_00:00:00' / &dimensions config_nvertlevels=41 config_nsoillevels=4 config_nfglevels=38 config_nfgsoillevels=4 / &data_sources LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [RFC][PATCH 0/9] File descriptor hot-unplug support @ 2009-04-11 12:01 Eric W. Biederman 2009-04-11 12:03 ` [RFC][PATCH 1/9] mm: Introduce remap_file_mappings Eric W. Biederman ` (11 more replies) 0 siblings, 12 replies; 99+ messages in thread From: Eric W. Biederman @ 2009-04-11 12:01 UTC (permalink / raw Yes, I ran the test script on the remote machine. Solution Use the following command to mount NFS: ii nfs-common 1:1.2.8-6ubuntu1.2 amd64 NFS support files common to client and server. Attached you'll find some screenshots of informations I collected about the CID chain and logs. privacy statement. It was hard to test though because it kept updating itself before I could test it and I kept forgetting that there were hanging processes on the remote from previous attempts. http://git.linux-nfs.org/?p=steved/cthon04.git;a=blob;f=lock/tlock.c;h=8c837a87976d17c58a25c9bd08d9f935e4521402;hb=HEAD#l835. Thanks/ LIKITH.S Share 356 views Related Questions Related Tags If it doesn't help, then please change nfsvers=4 to nfsvers=3, it should help. I think I read that flock should be supported on NFSv4. dgaudet 22 Sep 1998 18:06:03 -0000 With over 10 pre-installed distros to choose from, the worry-free installation life is here! By clicking Sign up for GitHub, you agree to our terms of service and to your account. that I teach, look here. Moreover, there are two types of locks. File descriptor obtained using open() cannot be used in flock() call when the file is on NFS mount. Since Linux 2.6.37, the kernel supports a compatibility mode that allows flock() locks . All jobs that try to create a project lock in this folder will fail with: awx/main/tasks.py", line 1865, in acquire_lock fcntl.flock(self.lock_fd, fcntl.LOCK_EX | fcntl.LOCK_NB) OSError: [Errno 9] Bad file descriptor. The manual page flock(2) had been out of date for a long time, but has since been updated to say (emphasis mine):. I didn't know if I should post this here or in a new issue, so apologies if it is in the wrong spot? Use the following command to open a network socket file descriptor. The same code works on other flavors of unix (solaris and HPUX) . When I try to set lock on the file using the fcntl it fails with Permission denied. I'm using Mac OS High Sierra 10.13, and I'm facing some issues sharing a folder through NFS. Only after uninstalling and re-installing the extension can I successfully connect to the server again. I don't have the access to the server hosting the NFS directory. If found to be negative, that indicates error or a "no value" condition. But no change: /proc/fs/nfs/exports remains empty and the client reports the same . checked the values matching in the web gui as well. NFS details In Linux kernels up to 2.6.11, flock () does not lock files over NFS (i.e., the scope of locks was limited to the local system). You could change the path in the script to somewhere in /tmp to test. Previous message (by thread): [OpenWrt-Devel] Fwd: OpenWRT Build Process broken on recent Debian NFS Next message (by thread): [OpenWrt-Devel] Fwd: OpenWRT Build Process broken on recent Debian NFS . fork(2), IBM's technical support site for all IBM products and services including self help and the ability to engage with IBM support engineers. 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