[Ocfs2-users] ocfs2-related hang

[Eric Jones]

Hello,

We think we've seen this issue a few times now and I wonder if anyone 
out there has any insight as to what's going on.

We have a large (40+) cluster accessing an OCFS2 v 1.2.1 filesystem.  
All nodes are Fedora Core 4 (kernel 2.6.13-1.1532_FC4smp).  One node is 
x86_64, the rest are i686.

On the affected node (the x86_64 host), we tried to start the Sun grid 
Engine dbwriter service.  All the related processes entered a permanent 
"D" state.  All root logins received a syslog message saying:

kernel: Kernel BUG at "/root/dnld/ocfs2/ocfs2-1.2.1/fs/ocfs2/file.c":787
kernel: invalid operand: 0000 [1] SMP

I've attached a syslog fragment with the full stack trace.

We were able to log into the box and reboot it.  The dbwriter then 
started normally.

Does anyone have suggestions on how to avoid this problem going forward?

-- 
Eric Jones                  ejones at jimmy dot harvard dot edu
System Adminstrator         Department of Biostatistics & Computational Biology
617-632-2447                Dana-Farber Cancer Institute

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