[Gluster-users] gnfs split brain when 1 server in 3x1 down (high load) - help request

[Ravishankar N]

Attached the wrong patch by mistake in my previous mail. Sending the 
correct one now.

-Ravi


On 15/04/20 2:05 pm, Ravishankar N wrote:
>
> On 10/04/20 2:06 am, Erik Jacobson wrote:
>> Once again thanks for sticking with us. Here is a reply from Scott
>> Titus. If you have something for us to try, we'd love it. The code had
>> your patch applied when gdb was run:
>>
>>
>> Here is the addr2line output for those addresses.  Very interesting 
>> command, of
>> which I was not aware.
>>
>> [root at leader3 ~]# addr2line -f 
>> -e/usr/lib64/glusterfs/7.2/xlator/cluster/
>> afr.so 0x6f735
>> afr_lookup_metadata_heal_check
>> afr-common.c:2803
>> [root at leader3 ~]# addr2line -f 
>> -e/usr/lib64/glusterfs/7.2/xlator/cluster/
>> afr.so 0x6f0b9
>> afr_lookup_done
>> afr-common.c:2455
>> [root at leader3 ~]# addr2line -f 
>> -e/usr/lib64/glusterfs/7.2/xlator/cluster/
>> afr.so 0x5c701
>> afr_inode_event_gen_reset
>> afr-common.c:755
>>
> Right, so afr_lookup_done() is resetting the event gen to zero. This 
> looks like a race between lookup and inode refresh code paths. We made 
> some changes to the event generation logic in AFR. Can you apply the 
> attached patch and see if it fixes the split-brain issue? It should 
> apply cleanly on glusterfs-7.4.
>
> Thanks,
> Ravi
>
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