SYMPTOMS
Some PSA background tasks keep fail with error message 'PEM node is unmanageble, host_id = $id'.CAUSE
PSA management node was unable to contact an agent installed on the host $id during the last communication attempt. This can be caused by network, hardware or software issues.RESOLUTION
Follow these steps to investigate the issue:1. Look-up the host by id
* Go to 'Top > System Director > Monitoring Manager'
* Select Host as a component type
* Click Next to see the list of all hosts registered in the system with their corresponding ids 2. Make sure that ports 8352/tcp and 8354/tcp are not filtered for communication between the host and the management node.
3. Make sure that the PSA agent on the host is up and running, restart if unsure:
on Windows, execute the following commands from the command prompt (Start->Run->cmd.exe) as local administrator:
net stop pem
net start pem on Linux, run as root:
/etc/init.d/pem restart Note: if using Virtuozzo, make sure you execute these commands inside a VPS, not on the hardware node itself
Note: using Windows clustering for MS Exchange back ends, make sure the cluster group (virtual server) is up and running and check PSA Agent on the active node. For verifying a cluster state one may use cluadmin (GUI) or cluster (console) utilities.
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