[Ocfs2-users] OCFS2 Threads using 100% CPU, filesystem operations were frozen

[Michael S. Moody]

I had an instance today on several servers where the load average soared,
and all of my apache processes were in uninterruptible sleep state.

 

I did run scanlocks, and the ps command as requested:

 

On one server some apache processes looked like this:

3345 D    apache2         dlm_wait_for_recovery

 

On another, the output was completely different.

 

Nonetheless, the following threads on one server were using 100% cpu:

 

[o2net]

[o2hb-BC778ACE98]

[dlm_thread]

 

That box needed to be rebooted, and things recovered.

 

The output of scanlocks:

 

forum3 ~ # ./scanlocks

/dev/sdb1  M000000000000000000002b7976e45d

/dev/sdb1  O000000000000000242b4bb00000000

/dev/sdb1  O0000000000000000dd506300000000

/dev/sdb1  O0000000000000000f898b400000000

/dev/sdb1  O0000000000000001b23aa000000000

/dev/sdb1  O000000000000000133e0c200000000

/dev/sdb1  O00000000000000011c6ea100000000

/dev/sdb1  N00000000013fffb30140013c

/dev/sdb1  N000000000039292b016d640d

/dev/sdb1  O0000000000000000f8999e00000000

/dev/sdb1  N000000000042fb6002ff2763

/dev/sdb1  O0000000000000002d5d64300000000

/dev/sdb1  O0000000000000001e639b100000000

/dev/sdb1  O0000000000000000398aa700000000

/dev/sdb1  O0000000000000000c139fd00000000

/dev/sdb1  O00000000000000014df4ab00000000

/dev/sdb1  D0000000000000000815e6ed5b0763f

 

 

forum ~ # ./scanlocks

/dev/sdd1  O0000000000000000dd506300000000

/dev/sdd1  M0000000000000000c102c700000000

/dev/sdd1  M000000000000000039d65600000000

/dev/sdd1  S000000000000000000000200000000

 

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