System rebooted unexpectedly, vmcore created
Issue
- The system rebooted unexpectedly with no errors in the logs, vmcore was collected by the hung_task_panic parameter.
- A few processes were stuck with following call traces
crash> foreach 13205 13276 bt
PID: 13205 TASK: ffff880822ba5540 CPU: 7 COMMAND: "java"
#0 [ffff8808239c1c58] schedule at ffffffff8150e0e2
#1 [ffff8808239c1d20] sym_wq_wait at ffffffffa04da983 [symev_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#2 [ffff8808239c1db0] symap_uc_uevent at ffffffffa0364714 [symap_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#3 [ffff8808239c1df0] symap_event_cb at ffffffffa0361a41 [symap_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#4 [ffff8808239c1e50] symev_deliver at ffffffffa04d01fa [symev_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#5 [ffff8808239c1e80] symev_filp_event at ffffffffa04d4dea [symev_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#6 [ffff8808239c1f00] symev_flush_null at ffffffffa04d51d7 [symev_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#7 [ffff8808239c1f20] filp_close at ffffffff8117e08c
#8 [ffff8808239c1f50] sys_close at ffffffff8117e185
#9 [ffff8808239c1f80] system_call_fastpath at ffffffff8100b072
PID: 13276 TASK: ffff880765210aa0 CPU: 7 COMMAND: "java"
#0 [ffff88076515bc58] schedule at ffffffff8150e0e2
#1 [ffff88076515bd20] sym_wq_wait at ffffffffa04da983 [symev_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#2 [ffff88076515bdb0] symap_uc_uevent at ffffffffa0364714 [symap_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#3 [ffff88076515bdf0] symap_event_cb at ffffffffa0361a41 [symap_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#4 [ffff88076515be50] symev_deliver at ffffffffa04d01fa [symev_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#5 [ffff88076515be80] symev_filp_event at ffffffffa04d4dea [symev_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#6 [ffff88076515bf00] symev_flush_null at ffffffffa04d51d7 [symev_rh_ES_6_2.6.32_131.0.15.el6_x86_64]
#7 [ffff88076515bf20] filp_close at ffffffff8117e08c
#8 [ffff88076515bf50] sys_close at ffffffff8117e185
#9 [ffff88076515bf80] system_call_fastpath at ffffffff8100b072
Environment
- Red Hat Enterprise Linux 6
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