Tried it with resource name and label but the same issue happens. The problem started to happen after the upgrade to 2.0 so we plan to downgrade to 1.12.1 and will check what happens.

I believe this is connected to: https://github.com/jenkinsci/lockable-resources-plugin/issues/24 .

(The strange thing to me is: I've never had problems before with Lockable Resources, till I started working with Generated Jobs - and try to lock 'em.)

Also I upgraded recently to 2.46.1. Before, Lockables worked fine with 2.x versions - not with Generated Jobs though - haven't tried back than. 

Any idea how to solve it? A workaround? 

Workaround: downgrade to ver. 1.11.2 of the plugin.

Now timeout doesn't occur after 1 minute.

Hi,

>I believe this is connected to: https://github.com/jenkinsci/lockable-resources-plugin/issues/24 .

Yes, I've also found this bug but this bug is really old and my problems started after I upgraded to the latest version. I checked the diff between the releases and noticed that the lock queue related methods got some refactoring. Probably a bug was introduced there.

My findings on this issue so far:

This issue is  really weird because we have 3 resource for our 3 different release and this problem only happens with one of them but it happens constantly with that one after the jenkins/plugin upgrade(we also did both). Tried to harmonize  the job configuration for the three release(the faulty one used resource name instead of label and the resource name contained underscore instead of spaces) but the bug still occurs. So I tried to downgrade the plugin but the problem still occurred with labels so I tested it with resource name and it seems like it works(so far). Although I had to revert the changes on the resource name(the job seems to be split the resource name along the spaces so it couldn't find it when space is used. This seems to be another bug in the plugin since as I said the other resources are have this naming convention and the plugin could find it with the label.)

 Br,

Bela

I had only one resource, and no special chars in either resource/label name.

So, the downgrade to 1.11.2 just brought it back to normal.

We had the same problem, with one of our 5 lockable resources. We downgraded to 1.11.2 and updated all configuration using the plugin and everything is working like before.

Also same problem with 2.0, generated jobs.

At first, one job holds the resource, the other one waits, resource is showing as queued.

After a short delay, the second job suddenly starts, the resource itself switches to "unlocked" state, and the second job shows the empty brackets: [].

Now both jobs are running simulataniously and the resource is incorrectly unlocked.

I believe I found a solution for this in the plugin code. In RequiredResourcesProperty.java there is this snippet in the RequiredResourcesProperty constructor. 

this.resourceNames = resourceNames;
this.resourceNamesVar = resourceNamesVar;
this.resourceNumber = resourceNumber;

The label name is set a little further down in the same way. It looks like these are getting set to an empty string when they should be getting set to null. I just added a little type checking and it works for me. 

this.resourceNames = resourceNames;
if (resourceNamesVar.equals("")) {
this.resourceNamesVar = null
} else {
this.resourceNamesVar = resourceNamesVar;
}
if (resourceNumber.equals("")) {
this.resourceNumber = null
} else {
this.resourceNumber = resourceNumber;
}

This fixes the job config issue pointed out by Andreas. 

@abayer: Are you aware of this? We still have this issue in version 2.1

Set up a PR to get that one done.

Code changed in jenkins
User: krull
Path:
src/main/java/org/jenkins/plugins/lockableresources/RequiredResourcesProperty.java
src/test/java/org/jenkins/plugins/lockableresources/BasicIntegrationTest.java
http://jenkins-ci.org/commit/lockable-resources-plugin/1e440bfbbd803400065c062ae6bba9b86a7e45ac
Log:
JENKINS-43574: fix construction of RequiredResourcesProperty

Code changed in jenkins
User: krull
Path:
src/main/java/org/jenkins/plugins/lockableresources/RequiredResourcesProperty.java
http://jenkins-ci.org/commit/lockable-resources-plugin/90bee03e8972183210ca5510f4e276bc8097cdb7
Log:
JENKINS-43574: replace whitespaces with tabs

Code changed in jenkins
User: Antonio Muniz
Path:
src/main/java/org/jenkins/plugins/lockableresources/RequiredResourcesProperty.java
src/test/java/org/jenkins/plugins/lockableresources/BasicIntegrationTest.java
http://jenkins-ci.org/commit/lockable-resources-plugin/67a01b44f4a995955e0888db62f927fcc740697a
Log:
Merge pull request #89 from krulls/master

JENKINS-43574: fix construction of RequiredResourcesProperty

Compare: https://github.com/jenkinsci/lockable-resources-plugin/compare/3b9717e389f7...67a01b44f4a9

Released as 2.2