3.1.2 Matrix Server Administration Guide

Chapter 19: Other Matrix Maintenance 254
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Troubleshoot Matrix Problems
The following situations do not produce specific error messages.
The Server Status Is “Down”
If a server is running but Matrix Server shows it as down, follow these
diagnostic steps:
1. Verify that the server is connected to the network.
2. Verify that the network devices and interfaces are properly configured
on the server.
3. Ensure that the ClusterPulse daemon is running on the server.
4. Verify that the same version of Matrix Server is installed on all servers
in the matrix.
A Running Service Is Considered Down
If Matrix Server indicates that a service is down even though it is running,
the service might not be sending any information to Matrix Server. Matrix
Server will conclude that the service is down even if the TCP connection
succeeds. In particular, if an HTTP server is monitored by a FTP monitor,
the HTTP server is considered down.
Also check the following:
1. Verify that the server is connected to the network.
2. Verify that the network devices and interfaces are properly configured
on the server.
3. Ensure that the ClusterPulse daemon and the service monitor agent
(monitor_agent) are running on the server.
A Virtual Host Is Inaccessible
If a site is inaccessible but Matrix Server indicates that it is okay, verify
that the service is running and that the actual data exists on the server
providing the network interface currently used by the virtual host.