How to Manually Clear Locks in Jenkins

Problem

Recently I got into a situation where I hit a bug with Jenkins where Jenkinsfile locks were not released if the job was terminated.

I tried:

• Restarting Jenkins
• Reinstalling the plugin
• Removing the locks manually from the top level Jenkins page
• Raising a bug

None of these worked.

I found a solution that involved manually hacking files.

Solution

1. Find the file named:

   org.jenkins.plugins.lockableresources.LockableResourcesManager.xml

   In the /var/jenkins_home​ folder (or wherever Jenkins is installed).

   It will look like this:

    

2. <org.jenkins.plugins.lockableresources.LockableResource>
     <name>cookbook_openshift3_test_lock_1</name>
     <description></description>
     <labels></labels>
     <queueItemId>0</queueItemId>
     <buildExternalizableId>cookbook-openshift3/master#208</buildExternalizableId>
     <queuingStarted>1512325412</queuingStarted>
     <queuedContexts/>
   </org.jenkins.plugins.lockableresources.LockableResource>

   Remove the line in bold containing the buildExternalizableId attribute.

3. Change the queuingStarted item

   <queuingStarted>1512325412</queuingStarted>

   to

   <queuingStarted>0</queuingStarted>

4. Restart Jenkins

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