Steps: 1. Create JMeter test script with default Backend Listener. 2. Set correct graphiteHost,graphitePort,rootMetricsPrefix and samplersList. 3. Change useRegexpForSamplersList to true. 4. Run the test script. Result: We can see exception like below: 2016/11/29 11:01:19 WARN - jmeter.engine.StandardJMeterEngine: Error encountered during shutdown of org.apache.jmeter.visualizers.backend.BackendListener@2b1f1961 java.lang.IllegalStateException: Failed calling teardownTest at org.apache.jmeter.visualizers.backend.BackendListener.testEnded(BackendListener.java:384) at org.apache.jmeter.visualizers.backend.BackendListener.testEnded(BackendListener.java:392) at org.apache.jmeter.engine.StandardJMeterEngine.notifyTestListenersOfEnd(StandardJMeterEngine.java:216) at org.apache.jmeter.engine.StandardJMeterEngine.run(StandardJMeterEngine.java:437) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NullPointerException at org.apache.jmeter.visualizers.backend.graphite.GraphiteBackendListenerClient.teardownTest(GraphiteBackendListenerClient.java:327) at org.apache.jmeter.visualizers.backend.BackendListener.testEnded(BackendListener.java:382) ... 4 more This is issue should be bring with the Bug 59099 fixed at 9 month ago. Bug 59099 - Backend listener : Add the possibility to consider samplersList as a Regular Expression I fixed this issue by changing code temporary. org.apache.jmeter.visualizers.backend.graphite.GraphiteBackendListenerClient move line 304 "samplersToFilter = new HashSet<>();" after line 301
mistake! Move line 304 "samplersToFilter = new HashSet<>();" after line 299
Thanks for your contribution. I chose a slightly different approach by checking for null instead of initialising the collection, though. Date: Tue Nov 29 20:10:27 2016 New Revision: 1771952 URL: http://svn.apache.org/viewvc?rev=1771952&view=rev Log: JMeter Graphite Backend Listener throws exception when test ends and useRegexpForSamplersList is set to true. Based on patch by Liu XP (liu_xp2003 at sina.com) Bugzilla Id: 60428 Modified: jmeter/trunk/src/components/org/apache/jmeter/visualizers/backend/graphite/GraphiteBackendListenerClient.java jmeter/trunk/xdocs/changes.xml