kernel: wait timeout, is_access=-1 问题求解

系统是centos6.10，message内容如下：

# grep -1 handshake /var/log/messages

Apr 13 08:38:58 gateway2 kernel: wait timeout, is_access=-1
Apr 13 08:38:58 gateway2 nrpe[17402]: Error: Could not complete SSL handshake. 5
Apr 13 08:38:58 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=17402 duration=10(sec)
--
Apr 13 09:10:49 gateway2 kernel: wait timeout, is_access=-1
Apr 13 09:10:49 gateway2 nrpe[17639]: Error: Could not complete SSL handshake. 5
Apr 13 09:10:49 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=17639 duration=10(sec)
--
Apr 13 09:42:59 gateway2 kernel: wait timeout, is_access=-1
Apr 13 09:42:59 gateway2 nrpe[17823]: Error: Could not complete SSL handshake. 5
Apr 13 09:42:59 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=17823 duration=10(sec)
--
Apr 13 09:44:08 gateway2 kernel: wait timeout, is_access=-1
Apr 13 09:44:08 gateway2 nrpe[17827]: Error: Could not complete SSL handshake. 5
Apr 13 09:44:08 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=17827 duration=10(sec)
--
Apr 13 09:45:09 gateway2 kernel: wait timeout, is_access=-1
Apr 13 09:45:09 gateway2 nrpe[17830]: Error: Could not complete SSL handshake. 5
Apr 13 09:45:09 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=17830 duration=10(sec)
--
Apr 13 10:16:18 gateway2 kernel: wait timeout, is_access=-1
Apr 13 10:16:18 gateway2 nrpe[18077]: Error: Could not complete SSL handshake. 5
Apr 13 10:16:18 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18077 duration=10(sec)
--
Apr 13 10:18:18 gateway2 kernel: wait timeout, is_access=-1
Apr 13 10:18:18 gateway2 nrpe[18087]: Error: Could not complete SSL handshake. 5
Apr 13 10:18:18 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18087 duration=10(sec)
Apr 13 10:18:28 gateway2 kernel: wait timeout, is_access=-1
Apr 13 10:18:28 gateway2 nrpe[18089]: Error: Could not complete SSL handshake. 5
Apr 13 10:18:28 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18089 duration=10(sec)
--
Apr 13 10:50:29 gateway2 kernel: wait timeout, is_access=-1
Apr 13 10:50:29 gateway2 nrpe[18350]: Error: Could not complete SSL handshake. 5
Apr 13 10:50:29 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18350 duration=10(sec)
--
Apr 13 11:21:38 gateway2 kernel: wait timeout, is_access=-1
Apr 13 11:21:38 gateway2 nrpe[18611]: Error: Could not complete SSL handshake. 5
Apr 13 11:21:38 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18611 duration=10(sec)
--
Apr 13 11:22:08 gateway2 kernel: wait timeout, is_access=-1
Apr 13 11:22:08 gateway2 nrpe[18620]: Error: Could not complete SSL handshake. 5
Apr 13 11:22:08 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18620 duration=10(sec)
Apr 13 11:22:12 gateway2 kernel: wait timeout, is_access=-1
Apr 13 11:22:12 gateway2 nrpe[18621]: Error: Could not complete SSL handshake. 5
Apr 13 11:22:12 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18621 duration=10(sec)
--
Apr 13 11:53:48 gateway2 kernel: wait timeout, is_access=-1
Apr 13 11:53:48 gateway2 nrpe[18955]: Error: Could not complete SSL handshake. 5
Apr 13 11:53:48 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18955 duration=10(sec)
--
Apr 13 11:55:39 gateway2 kernel: wait timeout, is_access=-1
Apr 13 11:55:39 gateway2 nrpe[18960]: Error: Could not complete SSL handshake. 5
Apr 13 11:55:39 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18960 duration=10(sec)
--
Apr 13 11:55:58 gateway2 kernel: wait timeout, is_access=-1
Apr 13 11:55:58 gateway2 nrpe[18963]: Error: Could not complete SSL handshake. 5
Apr 13 11:55:58 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=18963 duration=10(sec)
--
Apr 13 12:27:49 gateway2 kernel: wait timeout, is_access=-1
Apr 13 12:27:49 gateway2 nrpe[19191]: Error: Could not complete SSL handshake. 5
Apr 13 12:27:49 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19191 duration=10(sec)
--
Apr 13 12:29:07 gateway2 kernel: wait timeout, is_access=-1
Apr 13 12:29:08 gateway2 nrpe[19195]: Error: Could not complete SSL handshake. 5
Apr 13 12:29:08 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19195 duration=11(sec)
--
Apr 13 12:29:59 gateway2 kernel: wait timeout, is_access=-1
Apr 13 12:29:59 gateway2 nrpe[19199]: Error: Could not complete SSL handshake. 5
Apr 13 12:29:59 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19199 duration=10(sec)
--
Apr 13 13:01:18 gateway2 kernel: wait timeout, is_access=-1
Apr 13 13:01:18 gateway2 nrpe[19389]: Error: Could not complete SSL handshake. 5
Apr 13 13:01:18 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19389 duration=10(sec)
--
Apr 13 13:33:09 gateway2 kernel: wait timeout, is_access=-1
Apr 13 13:33:09 gateway2 nrpe[19596]: Error: Could not complete SSL handshake. 5
Apr 13 13:33:09 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19596 duration=10(sec)
--
Apr 13 13:33:29 gateway2 kernel: wait timeout, is_access=-1
Apr 13 13:33:29 gateway2 nrpe[19600]: Error: Could not complete SSL handshake. 5
Apr 13 13:33:29 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19600 duration=10(sec)
--
Apr 13 14:05:18 gateway2 kernel: wait timeout, is_access=-1
Apr 13 14:05:18 gateway2 nrpe[19793]: Error: Could not complete SSL handshake. 5
Apr 13 14:05:18 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19793 duration=10(sec)
--
Apr 13 14:05:39 gateway2 kernel: wait timeout, is_access=-1
Apr 13 14:05:39 gateway2 nrpe[19795]: Error: Could not complete SSL handshake. 5
Apr 13 14:05:39 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19795 duration=10(sec)
--
Apr 13 14:07:28 gateway2 kernel: wait timeout, is_access=-1
Apr 13 14:07:28 gateway2 nrpe[19801]: Error: Could not complete SSL handshake. 5
Apr 13 14:07:28 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19801 duration=10(sec)
--
Apr 13 14:07:49 gateway2 kernel: wait timeout, is_access=-1
Apr 13 14:07:49 gateway2 nrpe[19803]: Error: Could not complete SSL handshake. 5
Apr 13 14:07:49 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=19803 duration=10(sec)
--
Apr 13 14:37:59 gateway2 kernel: wait timeout, is_access=-1
Apr 13 14:37:59 gateway2 nrpe[20999]: Error: Could not complete SSL handshake. 5
Apr 13 14:37:59 gateway2 xinetd[12991]: EXIT: nrpe status=0 pid=20999 duration=10(sec)