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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(Hashtable.java:514)	at groovy.lang.Binding.setVariable(Binding.java:77)	at groovy.lang.Script.setProperty(Script.java:66)	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.setGroovyObjectProperty(ScriptBytecodeAdapter.java:528)	at Script1.run(Script1.groovy:1)	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:650)	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:636)	at hudson.plugins.groovy.SystemGroovy.perform(SystemGroovy.java:87)	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:782)	at hudson.model.Build$BuildExecution.build(Build.java:199)	at hudson.model.Build$BuildExecution.doRun(Build.java:160)	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:567)	at hudson.model.Run.execute(Run.java:1665)	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)	at hudson.model.ResourceController.execute(ResourceController.java:88)	at hudson.model.Executor.run(Executor.java:246)