how Randomly test case fails – Forked JVM exits abnormally.

 

Questions


I have suite of Junit tests which passes every time I run locally. I have setup a job to run the suite, hudson uses ANT to invoke the tests.This suite was passing in the hudson machine for quite some time. But from last 3 days one test fails some times (randomly). And We have not changed to code. The error is :

Error Message

Forked Java VM exited abnormally. Please note the time in the report does not reflect the time until the VM exit.

Stacktrace

junit.framework.AssertionFailedError: Forked Java VM exited abnormally. Please note the time in the report does not reflect the time until the VM exit.

I couldn’t find proper answer on google. I checked here

but it doesn’t seem to help.

Hudson machine details :
Windows 2003 Server
Java 1.6.0.29

 

 

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Answer

Do you still have access to the console log for the failed Hudson build? If the JVM is exiting ‘unexpectedly’ you may find a JVM bug is causing it to crash, which would not appear in the JUnit logs (which I assume is where you’ve got the error message/stack trace from), but probably would do in the output from Ant.

Alternatively:

  • Which version of Ant are you running? I have heard of a bug pre-Ant 1.7.1 that caused System.exit() to be called under some circumstances.
  • You may want to check that your code is not catching any exceptions that it shouldn’t be (e.g. catch Throwable).

ant,hudson,java,junit,jvm

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