NPE in JolokiaConnectionWrapper.extractStatus --------------------------------------------- Key: JBIDE-25674 URL: https://issues.jboss.org/browse/JBIDE-25674 Project: Tools (JBoss Tools) Issue Type: Bug Components: jmx Reporter: Aurélien Pupier {noformat} !ENTRY org.eclipse.core.jobs 4 2 2018-01-29 15:56:34.020 !MESSAGE An internal error occurred during: "Connect Job". !STACK 0 java.lang.NullPointerException at org.jboss.tools.jmx.jolokia.JolokiaConnectionWrapper.extractStatus(JolokiaConnectionWrapper.java:340) at org.jboss.tools.jmx.jolokia.JolokiaConnectionWrapper.verifyServerReachable(JolokiaConnectionWrapper.java:324) at org.jboss.tools.jmx.jolokia.JolokiaConnectionWrapper.connect(JolokiaConnectionWrapper.java:113) at org.jboss.tools.jmx.core.ConnectJob.run(ConnectJob.java:29) at org.jboss.tools.jmx.ui.internal.actions.DoubleClickAction$1.run(DoubleClickAction.java:71) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56) {noformat} I put a breakpoint in org.jboss.tools.jmx.jolokia.JolokiaConnectionWrapper.verifyServerReachable() to see which exception it was and it is a "503 Service Unavailable" in this case the "response" is null 2 possibilities: - it is normal that it is null in this case Jboss Tools need to handle this case - it is not normal that it is null and in this case, it needs to be reported upstream (even if a null check might nice as a workaround for now)