NullpointerException in instrumented class

[Mike Rosseel]

Hi,

I'm trying to run my junit classes using emma (great tool by the way).

When I put the non-instrumented classes in front of the classpath, all is fine and the unit tests run. When putting the instrumented ones in front, junit gives this:

    [junit]     Caused an ERROR
    [junit] null
    [junit] java.lang.reflect.InvocationTargetException
    [junit]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [junit]     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcces
sorImpl.java:39)
    [junit]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMet
hodAccessorImpl.java:25)
    [junit] Caused by: java.lang.ExceptionInInitializerError
    [junit]     at java.lang.Class.forName0(Native Method)
    [junit]     at java.lang.Class.forName(Class.java:141)
    [junit]     at org.apache.log4j.Logger.class$(Logger.java:25)
    [junit]     at org.apache.log4j.Logger.<clinit>(Logger.java:25)
    [junit]     at be.realsoftware.ivs.algo.ols.OrdinaryLeastSquaresTest.<clinit
>(OrdinaryLeastSquaresTest.java:26)
    [junit]     at java.lang.Class.forName0(Native Method)
    [junit]     at java.lang.Class.forName(Class.java:141)
    [junit]     at be.realsoftware.ivs.algo.ols.OlsSuite.suite(OlsSuite.java:29)

    [junit]     at be.realsoftware.ivs.algo.AlgoSuite.suite(AlgoSuite.java:33)
    [junit]     at be.realsoftware.ivs.IVSSuite.suite(Unknown Source)
    [junit]     ... 7 more
    [junit] Caused by: java.lang.NullPointerException
    [junit]     at org.apache.log4j.Level.<init>(Level.java)
    [junit]     at org.apache.log4j.Priority.<clinit>(Priority.java:37)
    [junit]     ... 17 more

The offending line is the following (Logger is a standard log4j 1.2.8 class) :

/** logger */
  private static final Logger logger = Logger.getLogger(OrdinaryLeastSquaresTest.class);

I guess it's some kind of reflection thing. Has anyone experienced this before, is it a bug, ...

greetings,
Mike

[Vlad Roubtsov]

Mike,

This seems to be an issue similar to the one already reported to me by a Trilogy user. I am certain it is related to classloading when you use emmarun or when you let junit (and ANT) do their (very incorrectly coded, I am afraid http://discuss.develop.com/archives/wa.exe?A2=ind0302&L=ADVANCED-JAVA&P=R16312&I=-3\) testcase classloading. It will be a high priority issue to address once I am done with the house move mentioned earlier in this forum.

If you are using the offline instrumentation mode (seems like you are according to your post), try the following:

- try forking <junit> (fork="true")

If this does not help, submit a bug report to the tracker that contains your exact <junit> invocation and attach the result of running "ant -debug ...".