Hi Derrick!
On Thu, 28 Feb 2013, Derrick Brashear wrote:
start with FileLog on the fileserver and see what errors for B (or D
or...) at around the time it breaks.
Unfortunately nothing jumps out. A colleague managed to pinpoint a
failure to a period of five minutes, but nothing was logged on the
fileserver. The only remotely suspicious message(s) are of the type
Feb 28 14:45:03 vmfs05 fileserver[4346]: FindClient: stillborn client
ac460e20(e8d98fa0); conn ac406ba0 (host XX.XX.XX.XX:7001) had client
a718bf0(e8d98fa0)
but according to older posts this is a harmless, informative message.
Additionally, I have seen these messages for years, and they did not
coincide with the pinpointed incident.
Maybe jacking up the loglevel might help?
Stephan
Derrick
On Feb 28, 2013, at 9:39, Stephan Wonczak <[email protected]> wrote:
Hi all!
for the past few weeks, we are struck with a very weird behavior regarding
cache updates of AFS clients. It looks like sometimes the callback does not
work and one client is stuck with an older version of the file in question.
Example:
Write to file 'foo' on client A every five minutes.
Clients B,C and D dutifully update their caches and see the updates
After some time, suddenly Client B dows not see the updates any more, while
clients C and D continue working fine.
A 'fs flush foo' on client B corrects the problem.
Other files are *NOT* affected and are updated fine on Client B.
This behavior is not really repeatable, though, sometimes it is client D that
stops working, or any other client.
When taking into account that the clients I am talking about here are web
servers, you can imagine that this behavior is less than desirable.
Now for the versions:
Clients are a mix of 1.4.x and 1.6.x (mainly 1.6.1-1.el5 and 1.4.12-el5, with
other versions thrown into the mix).
Servers are version 1.4.11-el5.
OS on both clients and server is RHEL5
It might be a coincidence, but we became aware of this problem shortly after
updating a bunch of clients to 1.6.1-1.el5.
Any ideas on how to go about debugging this?
Dipl. Chem. Dr. Stephan Wonczak
Regionales Rechenzentrum der Universitaet zu Koeln (RRZK)
Universitaet zu Koeln, Weyertal 121, 50931 Koeln
Tel: +49/(0)221/470-89583, Fax: +49/(0)221/470-89625
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Dipl. Chem. Dr. Stephan Wonczak
Regionales Rechenzentrum der Universitaet zu Koeln (RRZK)
Universitaet zu Koeln, Weyertal 121, 50931 Koeln
Tel: +49/(0)221/470-89583, Fax: +49/(0)221/470-89625
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OpenAFS-info mailing list
[email protected]
https://lists.openafs.org/mailman/listinfo/openafs-info
