Hello, 

I receive the following error every hour (12:05:00, 13:05:00 etc.) in jenkins.log:

--------jenkins.log--------

2019-07-18 13:05:00.949+0000 [id=161] SEVERE n.u.l.h.p.g.GitParameterDefinition#getDefaultParameterValue: [ EMPTY_JOB_NAME ] Unexpected error!
java.lang.NullPointerException
at net.uaznia.lukanus.hudson.plugins.gitparameter.jobs.JobWrapperFactory.createJobWrapper(JobWrapperFactory.java:15)
at net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterDefinition$DescriptorImpl.doFillValueItems(GitParameterDefinition.java:603)
at net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterDefinition.getDefaultParameterValue(GitParameterDefinition.java:151)
at hudson.plugins.git.util.GitUtils.addEnvironmentContributingActionsValues(GitUtils.java:329)
at hudson.plugins.git.util.GitUtils.getPollEnvironment(GitUtils.java:306)
at hudson.plugins.git.GitSCM.compareRemoteRevisionWithImpl(GitSCM.java:693)
at hudson.plugins.git.GitSCM.compareRemoteRevisionWith(GitSCM.java:668)
at hudson.scm.SCM.compareRemoteRevisionWith(SCM.java:400)
at hudson.scm.SCM.poll(SCM.java:417)
at hudson.model.AbstractProject._poll(AbstractProject.java:1390)
at hudson.model.AbstractProject.poll(AbstractProject.java:1293)
at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:603)
at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:649)
at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:119)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2019-07-18 13:05:00.950+0000 [id=161] SEVERE n.u.l.h.p.g.GitParameterDefinition#getDefaultParameterValue: [ EMPTY_JOB_NAME ] Unexpected error!
java.lang.NullPointerException
at net.uaznia.lukanus.hudson.plugins.gitparameter.jobs.JobWrapperFactory.createJobWrapper(JobWrapperFactory.java:15)
at net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterDefinition$DescriptorImpl.doFillValueItems(GitParameterDefinition.java:603)
at net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterDefinition.getDefaultParameterValue(GitParameterDefinition.java:151)
at hudson.plugins.git.util.GitUtils.addEnvironmentContributingActionsValues(GitUtils.java:329)
at hudson.plugins.git.util.GitUtils.getPollEnvironment(GitUtils.java:306)
at hudson.plugins.git.GitSCM.compareRemoteRevisionWithImpl(GitSCM.java:699)
at hudson.plugins.git.GitSCM.compareRemoteRevisionWith(GitSCM.java:668)
at hudson.scm.SCM.compareRemoteRevisionWith(SCM.java:400)
at hudson.scm.SCM.poll(SCM.java:417)
at hudson.model.AbstractProject._poll(AbstractProject.java:1390)
at hudson.model.AbstractProject.poll(AbstractProject.java:1293)
at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:603)
at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:649)
at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:119)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

--------jenkins.log--------

I am trying to understand what causes it. I can't find an issue with any of my jobs. I listed all job names and I couldn't find any of it to be empty or looking suspicious. 

I set via the UI > log extended logging (ALL) for following loggers:

hudson

net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterDefinition

java

Then I checked the related log from the UI, but I could not find any additional hints. 

In the log there is nothing related right before and right after the exception, that could point me to the root cause. 

I was able to find only issue "JENKINS-46216" which looks similar to mine, but it doesn't help me to understand my issue. 

Would anyone knows what could be causing this exception or how to further investigate it?

Thanks!