Zabbix server is not running: the information displayed may not be current

[Alan Lim]

I got the above message every few hours on the dashboard and error will be disappeared after putty in and restart the zabbix-server service.
When the above error happened again, I check on zabbix status (/etc/init.d/zabbix-server status) and discovered an inactive (dead) at the 2nd line below.
zabbix-server.service - Zabbix Server
Loaded: loaded (/lib/systemd/system/zabbix-server.service; enabled; vendor preset: enabled)
Active: inactive (dead) since Mon 2018-06-04 18:57:33 SGT; 15h ago
Process: 22545 ExecStop=/bin/kill -SIGTERM $MAINPID (code=exited, status=0/SUCCESS)
Process: 1144 ExecStart=/usr/sbin/zabbix_server -c $CONFFILE (code=exited, status=0/SUCCESS)
Main PID: 1293 (code=exited, status=0/SUCCESS)
Hence, i also checked on zabbix_serverlog, and seeing a lot the "of type "string" is not suitable for value type "Numeric (unsigned)". And always happened after zabbix-server being restarted.
A few hour later, the above message appeared again.
23029:20180605:230422.136 server #54 started [preprocessing worker #1]
23030:20180605:230422.137 server #55 started [preprocessing worker #2]
23031:20180605:230422.137 server #56 started [preprocessing worker #3]
22980:20180605:230424.928 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "48.298233" of type "string" is not suitable for value type "Numeric (unsigned)"
22982:20180605:230429.957 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "56.798033" of type "string" is not suitable for value type "Numeric (unsigned)"
22980:20180605:230438.019 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "43.981353" of type "string" is not suitable for value type "Numeric (unsigned)"
22983:20180605:230446.096 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "61.435125" of type "string" is not suitable for value type "Numeric (unsigned)"
22981:20180605:230453.136 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "25.065630" of type "string" is not suitable for value type "Numeric (unsigned)"
22982:20180605:230455.137 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "48.524354" of type "string" is not suitable for value type "Numeric (unsigned)"
22983:20180605:230457.157 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "80.979523" of type "string" is not suitable for value type "Numeric (unsigned)"
22981:20180605:230458.162 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "57.087273" of type "string" is not suitable for value type "Numeric (unsigned)"
22981:20180605:230459.170 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "56.797972" of type "string" is not suitable for value type "Numeric (unsigned)"
22980:20180605:230503.233 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "77.858487" of type "string" is not suitable for value type "Numeric (unsigned)"
22999:20180605:230516.633 cannot send list of active checks to "127.0.0.1": host [UbuntuZabbix] not found
22983:20180605:230522.351 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "48.299276" of type "string" is not suitable for value type "Numeric (unsigned)"
22983:20180605:230528.373 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "65.145471" of type "string" is not suitable for value type "Numeric (unsigned)"
22983:20180605:230529.377 error reason for "servername:vfs.fs.size[c:,pfree]" changed: Value "85.759859" of type "string" is not suitable for value type "Numeric (unsigned)"

Please help on this issue as I am not familiar with Zabbix system. Thank you

[Alan Lim]

Hi,
I managed to solve the "Zabbix Server is not running" error and the problem was due to out of memory. Increased VMwareCacheSize to 1024M and the system is running more than 12 hrs without any problem.

By the way, I still see these message in the zabbix_server.log.
22980:20180605:230424.928 error reason for "myserver:vfs.fs.size[c:,pfree]" changed: Value "48.298233" of type "string" is not suitable for value type "Numeric (unsigned)"
22980:20180605:230424.928 error reason for "myserver1:vfs.fs.size[c:,pfree]" changed: Value "48.298233" of type "string" is not suitable for value type "Numeric (unsigned)"

I even tried disabling the filesize discovery in the template and the message still appeared in the log.

Is there a problem with my template setting? or something else?

Thank you in advance.