I have a error very strange in my nagios installation, after upgrade of operative system from Ubuntu 14.04 to 16.04, appear in syslog the message:
Error: queue recv error. but only when exit the ssh session.
my sysctl.conf has the next configuration:
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kernel.msgmnb = 262144000
kernel.msgmax = 262144000
kernel.shmmax = 4294967295
kernel.shmall = 268435456
kernel.msgmni = 512000
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------ Message Queues --------
key msqid owner perms used-bytes messages
0x26000002 2359296 nagios 600 7825408 7642
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------ Message Queues --------
key msqid owner perms used-bytes messages
0x26000002 2359296 nagios 600 0 0
And the messages in syslog are the next when I perform a logoff ssh from system:
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Sep 9 17:15:01 nagios_server systemd[1]: Stopping User Manager for UID 1000...
Sep 9 17:15:01 nagios_server systemd[2568]: Reached target Shutdown.
Sep 9 17:15:01 nagios_server systemd[2568]: Stopped target Default.
Sep 9 17:15:01 nagios_server systemd[2568]: Stopped target Basic System.
Sep 9 17:15:01 nagios_server systemd[2568]: Stopped target Paths.
Sep 9 17:15:01 nagios_server systemd[2568]: Stopped target Timers.
Sep 9 17:15:01 nagios_server systemd[2568]: Stopped target Sockets.
Sep 9 17:15:01 nagios_server systemd[2568]: Starting Exit the Session...
Sep 9 17:15:01 nagios_server systemd[2568]: Received SIGRTMIN+24 from PID 2855 (kill).
Sep 9 17:15:01 nagios_server systemd[1]: Stopped User Manager for UID 1000.
Sep 9 17:15:01 nagios_server systemd[1]: Removed slice User Slice of nagios.
Sep 9 17:15:01 nagios_server ndo2db: Error: queue recv error.
Sep 9 17:15:03 nagios_server ndo2db: message repeated 102984 times: [ Error: queue recv error.]
Thanks.