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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

Solutions on the web

via GitHub by tfoote
, 1 year ago
via Jenkins JIRA by Oliver Gondža, 1 year ago
via Jenkins JIRA by Oliver Gondža, 1 year ago
via Oracle Community by 398631, 1 year ago
via Google Groups by Attila Barbocz, 2 years ago
This exception has no message.
via GitHub by colddew
, 2 years ago
java.lang.NullPointerException: 	at java.util.Hashtable.put(	at groovy.lang.Binding.setVariable(	at groovy.lang.Script.setProperty(	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.setGroovyObjectProperty(	at	at groovy.lang.GroovyShell.evaluate(	at groovy.lang.GroovyShell.evaluate(	at hudson.plugins.groovy.SystemGroovy.perform(	at hudson.tasks.BuildStepMonitor$1.perform(	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(	at hudson.model.Build$	at hudson.model.Build$BuildExecution.doRun(	at hudson.model.AbstractBuild$	at hudson.model.Run.execute(	at	at hudson.model.ResourceController.execute(	at