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JBoss AS 7 Configuration, Deployment, and Administration by Francesco Marchioni

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Troubleshooting mod_cluster

Installing mod_cluster requires just a few steps on the httpd side to get working; however, just in case you cannot get ahead with it, you can find some clues by allowing a verbose output on the administration console:

AllowDisplay On

When setting this directive, you can get some information about the single modules loaded into httpd:

Troubleshooting mod_cluster

Should you find any module that exhibits an OK in the display page, you have at least a clue to investigate.

One more possible cause of errors is advertising messages that could potentially hit a firewall. Remember that advertisement messages use UDP port 23364 and multicast address 224.0.1.105. ...

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