Found this in logs
2010-07-13 15:02:35] T [common.c:429:pl_inode_get] locks-home0:
Allocating new pl inode
[2010-07-13 15:02:35] T [posix.c:1454:posix_janitor_thread_proc]
posix-home0: janitor: closing file fd=165
[2010-07-13 15:02:35] T [posix.c:988:pl_release] locks-home0: Releasing
all locks with fd 0x631a00
[2010-07-13 15:02:35] T [posix.c:1454:posix_janitor_thread_proc]
posix-home0: janitor: closing file fd=173
[2010-07-13 15:02:35] T [posix.c:988:pl_release] locks-home0: Releasing
all locks with fd 0x672b50
[2010-07-13 15:02:35] T [posix.c:1454:posix_janitor_thread_proc]
posix-home0: janitor: closing file fd=175
[2010-07-13 15:02:35] T [server-protocol.c:1465:server_unlink_cbk]
threads-home0: 1401526: UNLINK_CBK 3145811/dovecot.index.backup.tmp
(3145825)
[2010-07-13 15:02:35] T [posix.c:988:pl_release] locks-home0: Releasing
all locks with fd 0x67f280
[2010-07-13 15:02:35] T [posix.c:1454:posix_janitor_thread_proc]
posix-home0: janitor: closing file fd=142
[2010-07-13 15:02:35] T [server-protocol.c:2471:server_lookup_cbk]
brick-home0: 710020: LOOKUP
/d/di/t/te/testpop4/258728/dbox/mailboxes/INBOX/dbox-Mails/dovecot.index.backup.tmp
(0) ==> -1 (No such file or directory)
[2010-07-13 15:02:35] D [inode.c:927:inode_path] threads-home0/inode: no
dentry for non-root inode 3145826
pending frames:
frame : type(1) op(LINK)

patchset: v3.0.5
signal received: 11
time of crash: 2010-07-13 15:02:35
configuration details:
argp 1
backtrace 1
dlfcn 1
fdatasync 1
libpthread 1
llistxattr 1
setfsid 1
spinlock 1
epoll.h 1
xattr.h 1
st_atim.tv_nsec 1
package-string: glusterfs 3.0.5
[2010-07-13 15:02:35] T [posix.c:988:pl_release] locks-home0: Releasing
all locks with fd 0x7eff5c021030
/lib64/libc.so.6[0x3326e302d0]
/usr/lib64/glusterfs/3.0.5/xlator/protocol/server.so(server_link_cbk+0x12a)[0x7eff6ab4917d]
[2010-07-13 15:02:35] T [posix.c:1454:posix_janitor_thread_proc]
posix-home0: janitor: closing file fd=165
/usr/lib64/glusterfs/3.0.5/xlator/performance/io-threads.so(iot_link_cbk+0xdf)[0x7eff6ad712b0]
/usr/lib64/libglusterfs.so.0[0x3e7ac1cbc7]
/usr/lib64/glusterfs/3.0.5/xlator/storage/posix.so(posix_link+0x8e9)[0x7eff6b19a4d3]
/usr/lib64/libglusterfs.so.0(default_link+0x17a)[0x3e7ac1cd61]
/usr/lib64/glusterfs/3.0.5/xlator/performance/io-threads.so(iot_link_wrapper+0x17a)[0x7eff6ad71445]
/usr/lib64/libglusterfs.so.0[0x3e7ac32ac3]
/usr/lib64/libglusterfs.so.0(call_resume+0xc1)[0x3e7ac38bca]
/usr/lib64/glusterfs/3.0.5/xlator/performance/io-threads.so(iot_worker_unordered+0x39)[0x7eff6ad74d0d]
/lib64/libpthread.so.0[0x3327a06617]
/lib64/libc.so.6(clone+0x6d)[0x3326ed3c2d]

*** This bug has been marked as a duplicate of bug 1003 ***