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From "Petar Tahchiev" <paranoia...@gmail.com>
Subject Problem with Cactus and Ant
Date Sun, 28 Oct 2007 18:10:13 GMT
Hi guys,

my name is Petar Tahchiev and I am one of the developers of Jakarta Cactus.
I have a really strange problem, when using Ant > 1.6.5.
When trying to execute my cactus tasks, I invoke actually the JunitTask, I
get the
following exception:
-----------------------------------------------------------------------------
/home/peter/bin/workspace/TestCactus/build.xml:93:
java.lang.NullPointerException
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(
DispatchUtils.java:115)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java
:1329)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(
DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
        at org.apache.tools.ant.Main.runBuild(Main.java:758)
        at org.apache.tools.ant.Main.startAnt(Main.java:217)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: java.lang.NullPointerException
        at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeInVM(
JUnitTask.java:1272)
        at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(
JUnitTask.java:823)
        at org.apache.cactus.integration.ant.CactusTask.executeInContainer(
CactusTask.java:453)
        at org.apache.cactus.integration.ant.CactusTask.execute(
CactusTask.java:204)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java
:288)
        at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(
DispatchUtils.java:105)
        ... 11 more
--- Nested Exception ---
java.lang.NullPointerException
        at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeInVM(
JUnitTask.java:1272)
        at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(
JUnitTask.java:823)
        at org.apache.cactus.integration.ant.CactusTask.executeInContainer(
CactusTask.java:453)
        at org.apache.cactus.integration.ant.CactusTask.execute(
CactusTask.java:204)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java
:288)
        at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(
DispatchUtils.java:105)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java
:1329)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(
DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
        at org.apache.tools.ant.Main.runBuild(Main.java:758)
        at org.apache.tools.ant.Main.startAnt(Main.java:217)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)

Total time: 8 seconds
------------------------------------------------------------------------------------------------

However, if I downgrade to Ant 1.6.5 I don't get this exception and
everything passes
smoothly. Looking at the source code of the task, on line 1272 here is what
we see:

runner = delegate.newJUnitTestRunner(test, test.getHaltonerror(),
                                         test.getFiltertrace(),
                                         test.getHaltonfailure(), false,
                                         true, classLoader);
so it turns out that delegate is null !!!
In Ant 1.6.5. there seems that this "delegate" object is missing. Also when
we look on line 799
we see that delegate is explicitly nullified:
------------------------------------------------

 delegate = null;

------------------------------------------------

????

Does these thoughts make any sense, and if yes, how can I resolve my
problems.

Thank you.

-- 
Regards, Petar!
Karlovo, Bulgaria.

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