[Pacemaker] why crmd can not be finished?

[ch huang]

i try to stop the corosync ,but it seems crmd blocked by something ?
# /etc/init.d/corosync stop
Signaling Corosync Cluster Engine (corosync) to terminate: [  OK  ]
Waiting for corosync services to
unload:........................................
 ......................................................

info in log

Jun 05 10:14:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:15:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:15:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:16:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:16:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:17:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:17:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:18:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:18:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:19:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:19:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:20:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:20:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:21:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:21:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:22:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:22:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:23:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:23:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:24:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:24:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:25:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:25:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:26:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:26:40 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
Jun 05 10:27:10 corosync [pcmk  ] notice: pcmk_shutdown: Still waiting for
crmd (pid=2992, seq=6) to terminate...
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