Fix for 'jenkins dead but pid file exists' error

Here is the Fix for error jenkins dead but pid file exists. You see this error when you check Jenkins service status. One important thing to note that you won’t find this error while starting the Jenkins service.

[root@localhost vagrant]# /etc/init.d/jenkins start
Starting Jenkins                                           [  OK  ]
[root@localhost vagrant]# /etc/init.d/jenkins status
jenkins dead but pid file exists

#Fix1:

This issue can happen if Jenkins’s user does not have enough permission on /var/log/jenkins and /var/cache/jenkins . Permission issue usually happens when you change Jenkins user from default.

First find your Jenkins user:

CentOS/RedHat:

[root@localhost vagrant]# cat /etc/sysconfig/jenkins | grep JENKINS_USER
JENKINS_USER="jarvis"

Debian/Ubuntu:

[root@localhost vagrant]# cat /etc/default/jenkins | grep JENKINS_USER
JENKINS_USER="jarvis"

Now make all files and directories under /var/log/jenkins and /var/cache/jenkins owned by the Jenkins user.

chown -R jarvis. {/var/log/jenkins/,/var/cache/jenkins/}

Then give proper permission for all files and directories.

find {/var/cache/jenkins,/var/log/jenkins} -type f -exec chmod 644 {} \;
find {/var/cache/jenkins,/var/log/jenkins} -type d -exec chmod 755 {} \;

Jenkins should be fine now.

[root@localhost vagrant]# /etc/init.d/jenkins start
Starting Jenkins                                           [  OK  ]
[root@localhost vagrant]# /etc/init.d/jenkins status
jenkins (pid  9049) is running...

#Fix1:

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