This error message as written doesn't exist in the Lustre code anywhere. Checking back in b1_8 it comes from ldlm_expired_completion_wait(), and I see that this string does exist in master, but is split across multiple lines... The other problem is that it is LDLM_DEBUG() now instead of LDLM_ERROR(), since it was changed in http://review.whamcloud.com/2201 (commit 57373a29) "Quiet/cleanup various common console message".
The string "not entering recovery" is visible in all releases, but is still in LDLM_DEBUG() since 2.3.59. If this test enabled D_DLMTRACE at the start, it could consistently find this in the MDS debug log. I also observe that this test is only checking the local console log instead of the MDS console log, so it has probably been broken for multi-node testing for a long time (though I've never seen it in my local node testing either). In a separate patch, could you please fix this to be:
local DLMTRACE=$(do_facet $SINGLEMDS lctl get_param debug)
do_facet $SINGLEMDS lctl set_param debug=+dlmtrace
mkdir $MOUNT1/$tdir ...
:
:
wait $OPENPID
do_facet $SINGLEMDS lctl debug_kernel |
grep "not entering recovery" && error "client not evicted"