Seen at: - http://stackoverflow.com/questions/34574084/class-name-in-junit-request-sampler-disappearing-in-jmeter-2-13 The user is using a 3rd party plugin in developer snapshot but this NPE could be avoided and more information given to users. Following stacktrace: 2016/01/03 23:57:51 ERROR - jmeter.gui.GuiPackage: Problem retrieving gui java.lang.NullPointerException at org.apache.jmeter.gui.GuiPackage.getTestElementCheckSum(GuiPackage.java:853) at org.apache.jmeter.gui.GuiPackage.updateCurrentNode(GuiPackage.java:435) at org.apache.jmeter.gui.GuiPackage.getCurrentGui(GuiPackage.java:272) at org.apache.jmeter.gui.action.EditCommand.doAction(EditCommand.java:45) at org.apache.jmeter.gui.action.ActionRouter.performAction(ActionRouter.java:81) at org.apache.jmeter.gui.action.ActionRouter.access$000(ActionRouter.java:40) at org.apache.jmeter.gui.action.ActionRouter$1.run(ActionRouter.java:63) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:694) at java.awt.EventQueue$3.run(EventQueue.java:692) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:703) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Author: pmouawad Date: Sun Jan 3 20:54:29 2016 New Revision: 1722754 URL: http://svn.apache.org/viewvc?rev=1722754&view=rev Log: Bug 58795 - NPE may occur in GuiPackage#getTestElementCheckSum with some 3rd party plugins Fix NPE Avoid computing checksum when undoHistory is disabled Bugzilla Id: 58795 Modified: jmeter/trunk/src/core/org/apache/jmeter/gui/GuiPackage.java jmeter/trunk/xdocs/changes.xml