title: no active checks on server [192.168.100.100:10051]: host [scidb601] not found
body: <p>The Server zabbix_agentd.conf</p>
  
  <p>Server=127.0.0.1,192.168.100.100</p>
  
  <pre><code>### Option: ListenPort
  #   Agent will listen on this port for connections from the server.
  #
  # Mandatory: no
  # Range: 1024-32767
  # Default:
  # ListenPort=10050
  
  
  ### Option: ListenIP
  #   List of comma delimited IP addresses that the agent should listen on.
  #   First IP address is sent to Zabbix server if connecting to it to retrieve list of active checks.
  #
  # Mandatory: no
  # Default:
  # ListenIP=0.0.0.0
  
  ### Option: StartAgents
  #   Number of pre-forked instances of zabbix_agentd that process passive checks.
  #   If set to 0, disables passive checks and the agent will not listen on any TCP port.
  #
  # Mandatory: no
  # Range: 0-100
  # Default:
   StartAgents=8
  
  ##### Active checks related
  
  ### Option: ServerActive
  #   List of comma delimited IP:port (or hostname:port) pairs of Zabbix servers for active checks.
  #   If port is not specified, default port is used.
  #   IPv6 addresses must be enclosed in square brackets if port for that host is specified.
  #   If port is not specified, square brackets for IPv6 addresses are optional.
  #   If this parameter is not specified, active checks are disabled.
  #   Example: ServerActive=127.0.0.1:20051,zabbix.domain,[::1]:30051,::1,[12fc::1]
  #
  # Mandatory: no
  # Default:
  # ServerActive=
  
  ServerActive=192.168.100.100:10051
  
  ### Option: Hostname
  #   Unique, case sensitive hostname.
  #   Required for active checks and must match hostname as configured on the server.
  #   Value is acquired from HostnameItem if undefined.
  #
  # Mandatory: no
  # Default:
  # Hostname=
  
  Hostname=scidb601
  </code></pre>
  
  <p>The Client zabbix_agentd.conf</p>
  
  <pre><code>        Server=192.168.100.100
          ### Option: ListenPort
          #   Agent will listen on this port for connections from the server.
          #
          # Mandatory: no
          # Range: 1024-32767
          # Default:
          # ListenPort=10050
          ### Option: ListenIP
          #   List of comma delimited IP addresses that the agent should listen on.
          #   First IP address is sent to Zabbix server if connecting to it to retrieve list of active checks.
          #
          # Mandatory: no
          # Default:
          # ListenIP=0.0.0.0
          ### Option: StartAgents
          #   Number of pre-forked instances of zabbix_agentd that process passive checks.
          #   If set to 0, disables passive checks and the agent will not listen on any TCP port.
          #
          # Mandatory: no
          # Range: 0-100
          # Default:
          # StartAgents=3
          ##### Active checks related
          ### Option: ServerActive
          #   List of comma delimited IP:port (or hostname:port) pairs of Zabbix servers for active checks.
          #   If port is not specified, default port is used.
          #   IPv6 addresses must be enclosed in square brackets if port for that host is specified.
          #   If port is not specified, square brackets for IPv6 addresses are optional.
          #   If this parameter is not specified, active checks are disabled.
          #   Example: ServerActive=127.0.0.1:20051,zabbix.domain,[::1]:30051,::1,[12fc::1]
          #
          # Mandatory: no
          # Default:
          # ServerActive=
          ServerActive=192.168.100.100
          ### Option: Hostname
          #   Unique, case sensitive hostname.
          #   Required for active checks and must match hostname as configured on the server.
          #   Value is acquired from HostnameItem if undefined.
          #
          # Mandatory: no
          # Default:
          # Hostname=
          Hostname=scidb601
  
  **
  </code></pre>
  
  <p>The zabbix_server.log shows: 
  cannot send list of active checks to [192.168.100.96]: host [scidb601] not found</p>
  
  <pre><code>And in mysql database, there is a host="scidb601" and user="zabbix".
  
  
  I can not visit the page which adds a host. 
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/nMgNX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nMgNX.png" alt="enter image description here"></a></p>
  
  <p>Please help me! Thanks a lot!</p>
  
  <p><a href="https://i.stack.imgur.com/l2vFE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/l2vFE.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/DyZkV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DyZkV.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/sjFwq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sjFwq.png" alt="enter image description here"></a></p>
  
  <pre><code>[root@scidb601 ~]# service mysqld status
  mysqld (pid 22917) is running...
  </code></pre>
  
  <p>Mysql error log:</p>
  
  <pre><code>150814 20:46:41 [ERROR] Native table 'performance_schema'.'file_summary_by_event_name' has the wrong structure
  150814 20:46:41 [ERROR] Native table 'performance_schema'.'file_summary_by_instance' has the wrong structure
  150814 20:46:41 [ERROR] Native table 'performance_schema'.'mutex_instances' has the wrong structure
  150814 20:46:41 [ERROR] Native table 'performance_schema'.'rwlock_instances' has the wrong structure
  150814 20:46:41 [ERROR] Native table 'performance_schema'.'cond_instances' has the wrong structure
  150814 20:46:41 [ERROR] Native table 'performance_schema'.'file_instances' has the wrong structure
  150814 20:46:41 [Note] /usr/libexec/mysqld: ready for connections.
  Version: '5.5.44-cll-lve'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MySQL Community Server (GPL) by Atomicorp
  </code></pre>