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At CEA they face Lustre-Client crashes due to ASSERTION(!request->rq_replay) failed.
As a consequence the application is lost and the node needs to be rebooted.
The crashing task stack always looks like :
===========================================
crash_kexec()
panic()
lbug_with_loc()
__ptlrpc_req_finished()
ptlrpc_req_finished()
ll_intent_release()
ll_create_nd()
vfs_create()
do_filp_open()
do_sys_open()
sys_open()
system_call_fastpath()
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It is possible to reproduce this issue very simply, by running on a Lustre client a short program that do an 'open' with the O_CREAT flag, but without specifying the third, mode parameter.
I know that the third parameter is mandatory when using the O_CREAT flag. If it is not given, then arbitrary permissions will be set, depending on the content of the stack.
But in any case it should lead to a client crash. When running the same test on ext4 for instance, the permissions set are non-sense but no crash occurs.
Sebastien.
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