The same CloudBees Skip plugin WARNING is flooding the logs

1 minute readKnowledge base

Issue

I have seen several times the below Warning message in the logs.

WARNING hudson.ExpressionFactory2$JexlExpression evaluate
Caught exception evaluating: !descriptor.skipGroupsByName.isEmpty() in $JOB_NAME/configure. Reason: java.lang.reflect.InvocationTargetException
java.lang.NullPointerException
	at java.base/java.util.HashMap.putMapEntries(HashMap.java:497)
	at java.base/java.util.HashMap.<init>(HashMap.java:486)
	at com.cloudbees.nectar.plugins.skip.SkipGroup$DescriptorImpl.getSkipGroupsByName(SkipGroup.java:529)
	at com.cloudbees.nectar.plugins.skip.SkipGroupsProperty$DescriptorImpl.getSkipGroupsByName(SkipGroupsProperty.java:119)
    [...]
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Environment

Resolution

This issue is caused by a misconfiguration in the usage of the CloudBees Skip Next Build Plugin. Please, review how to adequately configure the Skip Groups in this official documentation page. Another valuable source of information is this CloudBeesTV video.

Tested product/plugin versions