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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 Jenkins JIRA by Marco Clemencic, 1 year ago
via Jenkins JIRA by Marco Clemencic, 2 years ago
via by Unknown author, 2 years ago
via Stack Overflow by demaniak
, 2 years ago
This exception has no message.
java.lang.NullPointerException at java.util.Hashtable.put( at groovy.lang.Binding.setVariable( at groovy.lang.GroovyShell.setVariable( at hudson.plugins.groovy.SystemGroovy.perform( at hudson.plugins.groovy.GroovyTokenMacro.evaluate( at org.jenkinsci.plugins.tokenmacro.DataBoundTokenMacro.evaluate( at org.jenkinsci.plugins.tokenmacro.TokenMacro.expand( at org.jenkinsci.plugins.tokenmacro.TokenMacro.expand( at org.jenkinsci.plugins.buildnamesetter.BuildNameSetter.setDisplayName( at org.jenkinsci.plugins.buildnamesetter.BuildNameSetter.setUp( at hudson.model.Build$BuildExecution.doRun( at hudson.model.AbstractBuild$ at hudson.model.Run.execute( at at hudson.model.ResourceController.execute( at