Troubleshooting & Optimizing mod_jk
Issue
- There are errors in the mod_jk.log file such as:
Tomcat is down or refused connection
[error] ajp\_send\_request::jk\_ajp\_common.c (1585): (node2) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=110)
[error] ajp\_send\_request::jk\_ajp\_common.c (1467): (node2) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=111)
[error] ajp_send_request::jk_ajp_common.c (1630): (node2) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=113)
- There are apparent hangs where the webpage will just sit there and not respond or error out.
- mod_jk is operating very slowly
- Web requests are freezing, hanging, or very slow to respond
Environment
- Red Hat JBoss Enterprise Application Platform (EAP)
- 5.x
- 6.x
- Red Hat JBoss Enterprise Web Server (EWS)
- mod_jk 1.2.x
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