[Linux-cluster] gfs assertion failed on line 242 of file linux_dio.c

[Matt Brookover]

One GFS node had a kernel panic.  

I copied this from the console:

kernel panic: GFS: Assertion failed on line 242 of file linux_dio.c
gfs:assertion: "buffer_uptodate (bh)"
gfs:time=1139336367
gfs: fsid=CSM_ACN:u_af.3

The first part of the stack trace was logged by syslog:
Feb  7 11:19:27 inception kernel: Panicking because of write error
Feb  7 11:19:27 inception kernel: f41bfef8 f8f4cb72 00000001 c0384e98
00000000 00000246 00000021 f284bdec
Feb  7 11:19:27 inception kernel:        c01297e3 0000000a 00000400
f8f6e169 cccb6da8 cccb6d60 e35a6b8c f284bdec
Feb  7 11:19:27 inception kernel:        f8f308e5 f8f6c07e f8f6bfba
000000f2 00000013 f98ae000 f284bdec f284bd80
Feb  7 11:19:27 inception kernel: Call Trace:   [<f8f4cb72>] gfs_asserti
[gfs] 0x32 (0xf41bfefc)

The rest of the stack trace was was displayed on the console and I
copied it down.  If it would be of use, I can type it in.  

Any ideas what would cause this?

There are 6 nodes in the cluster running Enterprise 3 update 6 and GFS
6.0.2.27.

thanks

Matt

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