[Linux-cluster] Kernel panic: GFS: Assertion failed on line 550 of file rgrp.c

[Thai Duong]

Hi all,

My story is a little bit long so your patience is highly appreciated. I have
a 4-node Oracle9iR2 RAC using GFS 6.0 as the cluster file system. Each node
is running RHAS3 Update 6 for Itanium. We have 2 main pools: oracle_u01 to
store the $ORACLE_HOME, and oracle_u02 to store the datafile, controlfile,
redolog...Many thanks to the stabilization of GFS, this production cluster
have been running pretty well. Two days ago, the manager wants to have a
backup cluster with the same configuration except it consits of only one
node. Due to the lack of 64-bit servers, we got a node from the production
cluster out to make it become the 1-node backup cluster. We make new LUNs in
our EMC CX500 SAN, and clone the production's oracle_u01 and oracle_u02 to
them. We are able to mount these pools as GFS file system onto the backup
cluster's node. So far so good until we try to write to oracle_u02. Kernel
panic: GFS: Assertion failed on line 550 of file rgrp.c. It's pretty weird
cauze writing to oracle_u01 just works. They are just the same pool device
containing GFS file system, arent they? We even can not run df against u02!
We can mount and explore it using commands like cd, ls, dir...but not df!

There's no other message in /var/log/message, just the above error. If you
need any other information, please drop me a line! Please help.

Regards,

--Thai Duong
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