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I am trying to debug how the ssh-slaves is behaving but the Jenkins documentation from https://wiki.jenkins-ci.org/display/JENKINS/Logging is extremely incomplete.
I added a new logger and added:
Still the new log added is not updated at all.
Also, I found no information on how to enable logging for everything, empty, start or what?
Update: I tried to add -Djava.util.logging.loglevel=FINE to the command line starting Jenkins but to my surprise it did not had any effect on the JENKINS_LOG but it did had an effect on the log you can check on the GUI.
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Being able to debug a Jenkins plugins is a valuable addition to your development skills—it can help you understand what is going on with your own plugin while you are developing it, and it can also help you to resolve issues in other plugins or Jenkins itself.
I've taken a look in /var/log/jenkins/ as the documentation suggests, however the only file in that folder is a config file. Also, per the documentation, I have double checked the /etc/default/jenkins as well as the /etc/sysconfig/jenkins directories.
If you want to want to monitor all the Jenkins instances, then you need to install filebeat in all the instances and ships the application log to logstash. Here, we will ship the application logs of one Jenkins instance only. Below is the filebeat. yml to monitor jenkins log file.
To view logs from a specific action exposed by Jenkins, or a plugin not typically monitored, you can add a logger under Manage Jenkins -> System Log -> Add new log recorder. To add a new logger you will be asked to provide it a name and choose a function to monitor. You'll also have the ability to change the verbosity.
I know this is a bit late and doesn't resolve your root prolem, but I found I could enable logging by not adding a '.' (dot) at the end of the logger name. So, add
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