[Gluster-users] File operation failure on simple distributed volume

[yonex]

Hi Rafi,

Thanks for your response. OK, I think it is possible to capture debug
logs, since the error seems to be reproduced a few times per day. I
will try that. However, so I want to avoid redundant debug outputs if
possible, is there a way to enable debug log only on specific client
nodes?

Regards

Yonex

2016-12-13 23:33 GMT+09:00 Mohammed Rafi K C <rkavunga at redhat.com>:
> Hi Yonex,
>
> Is this consistently reproducible ? if so, Can you enable debug log [1]
> and check for any message similar to [2]. Basically you can even search
> for "EOF on socket".
>
> You can set your log level back to default (INFO) after capturing for
> some time.
>
>
> [1] : gluster volume set <volname> diagnostics.brick-log-level DEBUG and
> gluster volume set <volname> diagnostics.client-log-level DEBUG
>
> [2] : http://pastebin.com/xn8QHXWa
>
>
> Regards
>
> Rafi KC
>
> On 12/12/2016 09:35 PM, yonex wrote:
>> Hi,
>>
>> When my application moves a file from it's local disk to FUSE-mounted
>> GlusterFS volume, the client outputs many warnings and errors not
>> always but occasionally. The volume is a simple distributed volume.
>>
>> A sample of logs pasted: http://pastebin.com/axkTCRJX
>>
>> It seems to come from something like a network disconnection
>> ("Transport endpoint is not connected") at a glance, but other
>> networking applications on the same machine don't observe such a
>> thing. So I guess there may be a problem somewhere in GlusterFS stack.
>>
>> It ended in failing to rename a file, logging PHP Warning like below:
>>
>>     PHP Warning:  rename(/glusterfs01/db1/stack/f0/13a9a2f0): failed
>> to open stream: Input/output error in [snipped].php on line 278
>>     PHP Warning:
>> rename(/var/stack/13a9a2f0,/glusterfs01/db1/stack/f0/13a9a2f0):
>> Input/output error in [snipped].php on line 278
>>
>> Conditions:
>>
>> - GlusterFS 3.8.5 installed via yum CentOS-Gluster-3.8.repo
>> - Volume info and status pasted: http://pastebin.com/JPt2KeD8
>> - Client machines' OS: Scientific Linux 6 or CentOS 6.
>> - Server machines' OS: CentOS 6.
>> - Kernel version is 2.6.32-642.6.2.el6.x86_64 on all machines.
>> - The number of connected FUSE clients is 260.
>> - No firewall between connected machines.
>> - Neither remounting volumes nor rebooting client machines take effect.
>> - It is caused by not only rename() but also copy() and filesize() operation.
>> - No outputs in brick logs when it happens.
>>
>> Any ideas? I'd appreciate any help.
>>
>> Regards.
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>