Netbeans Profiler: Connecting to the target vm forever

Question

I am trying to attach the Netbeans profiler to my Java project but it get stucked with Connecting to the target vm.

I found this old bug report but that is already fixed. My version is 7.1.2 with Java 1.7.0_04 on windows 7.

I tried to disable the firewall and start Netbeans as administrator but still i got the same problem.

A bit strange is that calibration works fine.

I have the feeling it's a problem with Java 7. Because if I have look into profiler\lib\deployed there is no jdk17 folder. Only jdk16 and jdk15.

Any thoughts?

Answer 1

I found out the profiler works if I attach it dynamically. Therefor you have to start the application first (with a break point). Then you click Profile > Attach Profiler... In the top select your project and attach a local dynamical profiler. If you already created the wrong one you can change it at the bottom of the Attach Profiler dialog. Now select the running process and that's it.

Answer 2

I had the same problem using NetBeans 8.0.2 to profile a junit test in a multi-module maven project.

I worked around it by extracting the test into a standalone maven project and adding the other modules as dependencies.

The reason it doesn't work in the multi-module project is that when clicking Profile Test File NetBeans generates an incorrect command line. E.g. in the multi-module project, it produces:

cd C:\test; "JAVA_HOME=C:\\Program Files\\Java\\jdk1.8.0_40" cmd /c "\"\"C:\\Program Files\\NetBeans 8.0.2\\java\\maven\\bin\\mvn.bat\" -Dtest=PerfTest -DforkMode=once -Dmaven.surefire.debug=${exec.args} -Dexec.args= -Dmaven.ext.class.path=\"C:\\Program Files\\NetBeans 8.0.2\\java\\maven-nblib\\netbeans-eventspy.jar\" -Dfile.encoding=UTF-8 surefire:test\""

whereas it should be:

cd C:\test; "JAVA_HOME=C:\\Program Files\\Java\\jdk1.8.0_40" cmd /c "\"\"C:\\Program Files\\NetBeans 8.0.2\\java\\maven\\bin\\mvn.bat\" -Dtest=PerfTest -DforkMode=once -Dmaven.surefire.debug=${exec.args} -Dexec.args=\"-agentpath:\\\"C:/Program Files/NetBeans 8.0.2/profiler/lib/deployed/jdk16/windows-amd64/profilerinterface.dll\\\"=\\\"C:\\Program Files\\NetBeans 8.0.2\\profiler\\lib\\\",5140,10 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=C:\\Users\\foo\\AppData\\Local\\NetBeans\\Cache\\8.0.2\\mavencachedirs\\2029222463\\org-netbeans-modules-profiler  \" -Dmaven.ext.class.path=\"C:\\Program Files\\NetBeans 8.0.2\\java\\maven-nblib\\netbeans-eventspy.jar\" -Dfile.encoding=UTF-8 surefire:test\""

TL;DR - the -Dexec.args= argument is empty in the multi-module project.