I can get it back by rebooting them all the clients, but is there a way to get it working again without rebooting. Working with file modules that report a stale nfs file handle. Status ports 66ab63549afb 55c15482cf09 python srvtextblob 2. In some cases, nfs will cleanup its data structures after a timeout. Shalom bryan, its possible the file handle has been left open on the nfs server. A files file handle is assigned by an nfs server, and is supposed to be unique on that. I have a stale nfs handle problem i never ran across a problem like this before. In order to solve the problem the nfs caching should be removed by using noac mount option. Download your favorite linux distribution at lq iso.
Ive been pondering about an efficient way to locate stale nfs files for a few days with out much success and was wondering if there are better approaches to the problem. I am seeing application logs stating read or write operations on an nfs file, or operations on an nfs directory, complete with errno 116 estale. We have significant experience running these types of problems in a distributed computing environment. Consistently finding the stale nfs file handle problem with docker 0. How to unmount a stale nfs mount that fails to unmount with. So, a stale nfs handle occurring on a client after a server reboot, resolved on the client by an unremount of the clients file system is proper behaviour. If you plan to access multiplemany files you should consider using contextfull handles instead. I have an ongoing problem where i sporadically have nfs mounts that go stale. When this condition occurs, you typically see the following error. Oct 09, 2006 these can cause a stale nfs handle in some combinations of nfs version 2 also client to server communications, and processes that have correctly open file handles.
A typical example occurs when the current directory of a process, running on your client, is removed on the server either by a process running on the server or on. The most common cause is when a client changes into a working directory which is then deleted when the client then tries to access something relative to its current directory including. This note helps users understand the cause of the errors, and what to do to correct whatever issue is causing them. This results in hanging commands and errors such as nfs server not responding, or stale file handle reported in various os command output. How to decode nfs file handle in hpux hewlett packard. Most unixs tend to hang the affected process cause nfs is in the kerenl.
Application is running on host1 and these messages are also comming on host1 i want to find out the location of file causing this stale nfs file handle from the above given file handle. Temporarily losing network connection to the nfs server some times causes the nfs client mount to go stale. To recover from the stale nfs file handle file system state on a file module, you must suspend, reboot, and resume the file module. Solved orphan files stale file handle prevents boot on. A typical example occurs when the current directory of a process, running on your client, is removed on the server. If you run command such as ls or vi you will see an error. Nfs stale file handle error and solution knowledge base and. Mailing list a libnfs python mailing list is available at. This results in hanging commands and errors such as nfs server not responding, or stale file handle reported in various os command output df h, mount, ls. This happens most often when a dramatic change is made to the file system on the server. Issue clients mounting nfs filesystems report stale file handles what are some causes of stale file handles and how can they be prevented. Resolving stale file handle error on linux systems. When you perform a cd operation, the shell reevaluates the inode location of whatever destination you give it. According to managing nfs and nis, 2nd edition book.
Stale nfs file handle errors thrown in the server output. On these versions, the client can maintain a cache full of stale file data if a file is opened for write. Try remounting the file system on top of itself or shutting down any client processes that refer to stale file handles. Getting stale nfs file handle errors after cluster fail over this document 3714483 is provided subject to the disclaimer at the end of this document. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Symptom you are getting below error message on your linux unix operating system stale nfs file handle solution try to unmount and mount back the file.
Stale nfs file handle if you see in above example that 4 pid are using some files on said mount point. Im giving it a last try it download a few gigs each time, then crashes, but. It wont be that useful to find a particular file that was bad but its a load module or mapped file. Verify that the state of each affected file module is healthy and that no new stale nfs file handle cims are displayed in the alert log after you resume the file module.
But it can happen with nfs if the file is deleted by the server or a different client, because nfs is stateless and the server doesnt know that clients have a file open. The inode which the filehandle refers to is no longer present on the server. Jan 16, 2020 according to managing nfs and nis, 2nd edition book. A file handle becomes stale whenever the file or directory referenced by the handle is removed by another host, while your client still holds an active reference to the object. The problem is coming from the nfs caching attributes. If you prefer not to reboot like you said, a work around would be to create a new mount point on the client for the mount point with the stale nfs file handle. One virtual machine runnning on xen host experienced stale nfs file handle problems and i cant explain it while there is no nfs mount present. All the nics in our private network were converted to jumbo frames without effect. Sep 25, 2019 stale nfs file handle errors occur in the server output. Open the cli in the active management node using root privileges, and issue usrsbinexportfs a to flush the nfs cache in each file module. It doesnt appear that these are causing any significant problems, but there are a lot of them. Now that its back on, my nfs clients get a stale nfs handle on the nfs share. What are some causes of stale file handles and how can they be prevented. Nfsv3 server is returning stale file handles during.
This cant happen with local files because the kernel doesnt remove the file until all file descriptors are closed. May 19, 20 the vm fusion vmdk, should work with workstation and esxi is suspended with this issue. Getting stale nfs file handle errors after cluster fail. The stale nfs handle indicates that the client has a file open, but the server no longer recognizes the file handle. This can happen if someone, for instance, were to remove the file on the server without the client being aware of. A file or directory that was opened by an nfs client was either removed or replaced on the server. Stale file handle means that an open file was deleted. Typically, when this occurs, the nfs client will transparently handle the estale error, and report back that the file no longer exists. In other cases, you will need to clean the nfs data structures yourself and restart nfs afterwards.
Stale file handle error, when process trying read the file, that other process already had deleted. Now that your shell knows the new inode for the directory and the new inodes for its contents, future requests for its contents will be valid. The value of each symbol is the corresponding integer value. How to decode nfs file handle in hpux thanks for response. I am unable to stat the directory where the mount is occurring, and have to take drastic measures to resolve this issue.
Which version of python are you using and how do you start your processes for testing. Solved orphan files stale file handle prevents boot on btrfs sorry for the late reply. This is expecially a problem on a build server where intermediate builds are reused and when the intermediate builds have stale file handles, causing all builds later to fail. Stale file handle error, when process trying read the file, that other. The nfs specification is clear about use of file handles after an object be it file or directory has been deleted. Resolving stale file handle error on linux systems kba1037. These mount utilize the netapp snapshot backup technology to do backups of the nas mounts. In the following example, a python file create script was run from two clients to a netapp. If you were editing this file, write it to a local file system instead. It depends on whether the termination was abnormal or not. If the problem persists, continue with the following steps. Contribute to delphixnfsutils development by creating an account on github. Such change worses nfs performance, but it ensures that each nfs client is using up to date attributes and can access up to date data. For example nfs mounted directories sometimes contain stale file handles.
It seems like it is loosing the file handle if the file has just been created. Clients mounting nfs filesystems report stale file handles. Working with file modules that report a stale nfs file handle ibm. The only solution is remount the nfs file system in client use below command to remount. Nov 18, 2017 so you get a stale file handle message because you asked for some nonexistent data. I started back programming python again after a hiatus of several years and run into a sticky problem that i cant seem to fix, regardless of how hard i try it it starts with tailing a log file. Every following session that is opened receives stale nfs file handle errors and screwed or no access to the affected directories. Also i tried exporting my home folder which resides on an apfs volume, that worked fine and does not exhibit the above problems. These can cause a stale nfs handle in some combinations of nfs version 2 also client to server communications, and processes that have correctly open file handles. Over time these snapshot backups are removed and the mounts then go stale do to them.
Stale nfs file handle in hpux 11v3 hewlett packard. So your problem is stale nfs file handle, your nfs server or networking went down. I really like the functionality and stability you all have built, and its taken me several months to find my first issue with your library. Nfs stale file handle error and solution knowledge base. Nfsv3 server is returning stale file handles during mount of a new share red hat customer portal red hat customer portal. It is sometimes possible, due to network, environmental, or other issues, for an nfs mount to become disconnected from the server which results in stale nfs file handles. I dont have any experiance with vax, but assume that it is like other unixs. Stale nfs file handle the report is completing with a warning. Now to remove nfs stale file handle error perform following course of action. Acquire and install a recent distribution of linux. We have been getting a lot reports recently where some hosts with nas have the hidden. Ive recently fixed some issues with mysql server that stores its data on nfs, which is not a fully supported scenario, but that is where the disk space is. The stack trace in the server output log file shows this error.
Aug 18, 2008 everything works beautifully, with one exception. A filehandle becomes stale whenever the file or directory referenced by the handle is removed by another host, while your client still holds an active reference to the object. You your script needs to wait til the server send ok. Cant access vagrant folder on vagrant machine stale file handle posted on 15th october 2019 by peejee im currently stuck on a problem for 2 days already. Managing nfs and nis, 2nd edition book defines filehandles as follows.
The drawback is that every contextfree handle have to perform their own nfs mount internally. Standard attempts to umount fails with the ebusy message. Actually stale file handle occurs when nfs server configuration changed but the same as not yet updated to remote client. We observed the same performance issues and the same stale file handle errors. Sporadic stale handles most likely is an internal congestion in the bad linux nfs client, and congestions are most likely in bad suse kernels. The elm is often configured to use external file shares to store database and storage pool information. Jul 17, 2001 do you know if any changes have been made.
The stale nfs file handle error shows up if the images are deleted before the. Its using zol zfs for varlibdocker, which may or may not be a contributing factor. A stale nfs handle occurs when the client is holding a reference to something thats whisked away from under it by another client. For example, nfs mounted directories sometimes contain stale file handles. Suppose i have a nfs client who has requested for a particular file from the nfs server. Basically, im trying to tail a log file and send the contents elsewhere in the script here, i call it processor. If that deleting with inode didnt work maybe you should try repairing your disk with fsck. One of its mount point called dmp is mounted using nfs on the client machine having hostname client1. Hello all, i have a small question regarding the nfs file handles. So you get a stale file handle message because you asked for some nonexistent data.
This can be useful for nfs failover, to ensure that both servers of the failover pair use the same nfs file handles for the shared filesystem thus avoiding stale file handles after failover. The names and descriptions are borrowed from linuxincludeerrno. Stale nfs file handle is one of nfs nasty things, means there is no way around this, usually. A mount t nfs fails with stale file handle if the server has some stale exports entries for that client example scenario. And sane clients continue without stale nfs handle. Where these structures are located are somewhat os dependent. When the server is back and the client then umounts and tries to mount the nfs volume the server might respond with.
Some linux filesystems are not mounted on a block device. Nfs stale file descriptor and close hewlett packard. May 20, 2018 a filehandle becomes stale whenever the file or directory referenced by the handle is removed by another host. A stale nfs file handle can prevent enterprise log manager. So i get the filehandle for that file and i can use it. Cant access vagrant folder on vagrant machine stale file. A reboot of a sane nfs server retains the nfs file handle. Ive recently fixed some issues with mysql server that stores its data on nfs, which is not a fully supported scenario, but that is. Nfs network file system version 3 and 4 sometime nfs can result in weird problems. Timout issue, we had this a lot at the start, got it fixed, the last upgrade brought it back again. The stale nfs file handle errors can be predictably reproduced. You must first install libnfs before you can use this module. This module makes available standard errno system symbols.
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