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 quickly even to be rotated, and just eats up all my disk space, which then causes various services to fail because they cannot write files anymore.

How do I avoid that?

answer：

This seems to be due to DNS multicast as explained here: https://issues.jenkins-ci.org/browse/JENKINS-25369

Workaround: add -Dhudson.DNSMultiCast.disabled=true to JAVA_ARGS.

PS: I'm answering my own question here on Stack Overflow because I couldn't find the answer on Google easily, and it will be useful to other people running Jenkins.

# 我

# vi  /etc/init.d/jenkins

#PARAMS="--logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war --daemon --argumentsRealm.passwd.user=jenkinsPassword --argumentsRealm.roles.user=jenkinsAdmin"

#避免dns错误，产生大量log

PARAMS="-Dhudson.DNSMultiCast.disabled=true --logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war --daemon --argumentsRealm.passwd.user=jenkinsPassword --argumentsRealm.roles.user=jenkinsAdmin"