Re: [NFS] Stale NFS file handle error

[Peter Staubach <staubach@redhat.com>]

Tom H wrote:
> Peter Staubach wrote:
>   
>> Are you sure that you don't have two (or more) different NFS
>> clients working in the same directory?
>>
>> The ESTALE error usually occurs when a change is made on the
>> server to something that a client is accessing, perhaps
>> directly on the server or more commonly, by a different NFS
>> client.
>>     
>
> I'm as sure as I can be that the app is not opening the file multiple 
> times, the previous lines of code actually generate the folder and its 
> all sequential. The file names are all deterministic, only 1 process 
> running and nothing else accesses those files on the server. I have 
> checked for things like backup processes.
>
> It happens so infrequently that I get the feeling that its more likely 
> something else.
>
> I guess that I am looking for ways to troubleshoot the problem, maybe 
> with debug tools or whatever the guru nfs people would use...

It sounds like you are only using 1 NFS client?  Do you have
the same file system from the server mounted in more than one
place on this client?

You could try using something like tshark or tcpdump to capture
the network traffic when the error occurs, but I suspect that
if it really only happens infrequently, then you would end up
with gigabytes of capture and may or may not actually be able to
identify the traffic when the problem occurs.

Alternately, when the problem occurs, see if the file being
accessed really does continue to exist and is the same file,
ie. wasn't removed and then a new file with the same name
created in its place.

       ps

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