We are monitoring SSH agents. If Session Chanel cannot be closed for some reasons during closing Session Chanel,
Poller is trying to close Session Chanel many times until ZabbixServer process is restarted.

Too many trials for the closure cause high cpu usage and enlarging the zabbix_server.log file where lots of
error messages for the failure of Session Chanel close are recorded.

For avoiding high cpu usage and enlarging the zabbix_server.log file, Poller should be more intelligent not to
try to close Session Chanel many times. It would be advised that the trial should not be done if the
return code is not LIBSSH2_ERROR_EAGAIN.