How to stop Jenkins log from becoming huge?

Question

Recently my jenkins.log has started getting very large, very quickly, full of exceptions about DNS resolution. I attempted to use logrotate, but the log file grows too quick

Answer 1

You can disable the logging of these DNS errors by adjusting the logging settings within Jenkins.

From the Jenkins web interface go to:

 Manage Jenkins -> System Log -> Log Levels (on the left)

Add the following entry:

Name: javax.jmdns

Level: off

This way you can keep the Multicast DNS feature but without all the logging data.