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. Download your favorite linux distribution at lq iso. How to decode nfs file handle in hpux hewlett packard. Open the cli in the active management node using root privileges, and issue usrsbinexportfs a to flush the nfs cache in each file module. This results in hanging commands and errors such as nfs server not responding, or stale file handle reported in various os command output. Managing nfs and nis, 2nd edition book defines filehandles as follows. Now that its back on, my nfs clients get a stale nfs handle on the nfs share. Temporarily losing network connection to the nfs server some times causes the nfs client mount to go stale. Im giving it a last try it download a few gigs each time, then crashes, but. A typical example occurs when the current directory of a process, running on your client, is removed 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. How to unmount a stale nfs mount that fails to unmount with. 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. Stale nfs file handle if you see in above example that 4 pid are using some files on said mount point.
This happens most often when a dramatic change is made to the file system on the server. When this condition occurs, you typically see the following error. Shalom bryan, its possible the file handle has been left open on the nfs server. A stale nfs file handle can prevent enterprise log manager. 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. I dont have any experiance with vax, but assume that it is like other unixs.
Which version of python are you using and how do you start your processes for testing. 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. Working with file modules that report a stale nfs file handle. It depends on whether the termination was abnormal or not. Solved orphan files stale file handle prevents boot on.
Resolving stale file handle error on linux systems. Now to remove nfs stale file handle error perform following course of action. I am unable to stat the directory where the mount is occurring, and have to take drastic measures to resolve this issue. Contribute to delphixnfsutils development by creating an account on github. Consistently finding the stale nfs file handle problem with docker 0. The value of each symbol is the corresponding integer value. The elm is often configured to use external file shares to store database and storage pool information.
Stale file handle error, when process trying read the file, that other process already had deleted. 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 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. A mount t nfs fails with stale file handle if the server has some stale exports entries for that client example scenario. 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. Getting stale nfs file handle errors after cluster fail. Nfs stale file descriptor and close hewlett packard.
The stale nfs file handle errors can be predictably reproduced. It wont be that useful to find a particular file that was bad but its a load module or mapped file. On these versions, the client can maintain a cache full of stale file data if a file is opened for write. 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. In some cases, nfs will cleanup its data structures after a timeout. To recover from the stale nfs file handle file system state on a file module, you must suspend, reboot, and resume the file module. A files file handle is assigned by an nfs server, and is supposed to be unique on that. 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 where the disk space is. The inode which the filehandle refers to is no longer present on the server. It doesnt appear that these are causing any significant problems, but there are a lot of them. When the server is back and the client then umounts and tries to mount the nfs volume the server might respond with. Nfs stale file handle error and solution knowledge base and. 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.
Where these structures are located are somewhat os dependent. 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. 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. 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. The stale nfs handle indicates that the client has a file open, but the server no longer recognizes the file handle. 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. Most unixs tend to hang the affected process cause nfs is in the kerenl. We use rhel7 along with netapp filers that provide nfs storage. How to resolve nfs stale file handle error ux techno. May 19, 20 the vm fusion vmdk, should work with workstation and esxi is suspended with this issue. Stale nfs file handle in hpux 11v3 hewlett packard. The problem is coming from the nfs caching attributes.
Basically, im trying to tail a log file and send the contents elsewhere in the script here, i call it processor. Sep 25, 2019 stale nfs file handle errors occur in the server output. 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. We have been getting a lot reports recently where some hosts with nas have the hidden. How to decode nfs file handle in hpux thanks for response. Stale nfs file handle is one of nfs nasty things, means there is no way around this, usually. If you run command such as ls or vi you will see an error. You must first install libnfs before you can use this module. One of its mount point called dmp is mounted using nfs on the client machine having hostname client1. 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. It seems like it is loosing the file handle if the file has just been created. The nfs specification is clear about use of file handles after an object be it file or directory has been deleted. If that deleting with inode didnt work maybe you should try repairing your disk with fsck.
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. If you were editing this file, write it to a local file system instead. This can happen if someone, for instance, were to remove the file on the server without the client being aware of. 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. 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.
This module makes available standard errno system symbols. Nfsv3 server is returning stale file handles during mount of a new share red hat customer portal red hat customer portal. Nfs network file system version 3 and 4 sometime nfs can result in weird problems. The names and descriptions are borrowed from linuxincludeerrno. Stale file handle error, when process trying read the file, that other. Try remounting the file system on top of itself or shutting down any client processes that refer to stale file handles. A file or directory that was opened by an nfs client was either removed or replaced on the server. Stale nfs file handle the report is completing with a warning. Ive recently fixed some issues with mysql server that stores its data on nfs, which is not a fully supported scenario, but that is. Solved orphan files stale file handle prevents boot on btrfs sorry for the late reply. If the problem persists, continue with the following steps. And sane clients continue without stale nfs handle. Suppose i have a nfs client who has requested for a particular file from the nfs server. 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.
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. Nov 18, 2017 so you get a stale file handle message because you asked for some nonexistent data. Hello all, i have a small question regarding the nfs file handles. When you perform a cd operation, the shell reevaluates the inode location of whatever destination you give it. So you get a stale file handle message because you asked for some nonexistent data. In other cases, you will need to clean the nfs data structures yourself and restart nfs afterwards. Its using zol zfs for varlibdocker, which may or may not be a contributing factor. In order to solve the problem the nfs caching should be removed by using noac mount option. I have an ongoing problem where i sporadically have nfs mounts that go stale.
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. Every following session that is opened receives stale nfs file handle errors and screwed or no access to the affected directories. So i get the filehandle for that file and i can use it. For example, nfs mounted directories sometimes contain stale file handles. Working with file modules that report a stale nfs file handle ibm. This note helps users understand the cause of the errors, and what to do to correct whatever issue is causing them. The stack trace in the server output log file shows this error. Typically, when this occurs, the nfs client will transparently handle the estale error, and report back that the file no longer exists. Mailing list a libnfs python mailing list is available at. I have a stale nfs handle problem i never ran across a problem like this before.
Resolving stale file handle error on linux systems kba1037. A stale nfs handle occurs when the client is holding a reference to something thats whisked away from under it by another client. If you plan to access multiplemany files you should consider using contextfull handles instead. Standard attempts to umount fails with the ebusy message. Timout issue, we had this a lot at the start, got it fixed, the last upgrade brought it back again. We have significant experience running these types of problems in a distributed computing environment. What are some causes of stale file handles and how can they be prevented. In the following example, a python file create script was run from two clients to a netapp. All the nics in our private network were converted to jumbo frames without effect. Also i tried exporting my home folder which resides on an apfs volume, that worked fine and does not exhibit the above problems. The drawback is that every contextfree handle have to perform their own nfs mount internally. These mount utilize the netapp snapshot backup technology to do backups of the nas mounts. Jan 16, 2020 according to managing nfs and nis, 2nd edition book.
We observed the same performance issues and the same stale file handle errors. 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. Stale file handle means that an open file was deleted. 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. Cant access vagrant folder on vagrant machine stale file. You your script needs to wait til the server send ok.
Stale nfs file handle errors thrown in the server output. Actually stale file handle occurs when nfs server configuration changed but the same as not yet updated to remote client. 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. So your problem is stale nfs file handle, your nfs server or networking went down. Over time these snapshot backups are removed and the mounts then go stale do to them. Status ports 66ab63549afb 55c15482cf09 python srvtextblob 2. 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. Nfsv3 server is returning stale file handles during. According to managing nfs and nis, 2nd edition book. Now you are getting nfs stale file handle error on the client machine client1. Some linux filesystems are not mounted on a block device. Jul 17, 2001 do you know if any changes have been made. Waiting for elm db to start when this issue occurs, mounting of an external share might time out or fail to complete, and a tcpdump reports a stale nfs handle. 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.
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