I updated my hudson from 1.236 to 1.240. The hudson.war runs under jdk 1.6 in
jboss 4.2 but the jobs execute under jdk jrockit-R27.5.0-jdk1.5.0_14.

Since updating, all my jobs now fail with an UnsupportedOperationException.

ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.UnsupportedOperationException
at java.util.Collections$UnmodifiableCollection.addAll(Collections.java:1028)
at hudson.plugins.tasks.util.ParserResult.addModules(ParserResult.java:202)
at hudson.plugins.tasks.TasksReporter.perform(TasksReporter.java:178)
at hudson.plugins.tasks.TasksReporter.perform(TasksReporter.java:32)
at
hudson.plugins.tasks.util.HealthAwareMavenReporter.postExecute(HealthAwareMavenReporter.java:124)
at
hudson.maven.MavenModuleSetBuild$Builder.postExecute(MavenModuleSetBuild.java:597)
at hudson.maven.MavenBuilder$Adapter.postExecute(MavenBuilder.java:256)
at
hudson.maven.agent.PluginManagerInterceptor$1MojoIntercepterImpl.callPost(PluginManagerInterceptor.java:147)
at
hudson.maven.agent.PluginManagerInterceptor.executeMojo(PluginManagerInterceptor.java:160)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:480)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:459)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
at
org.apache.maven.lifecycle.LifecycleExecutorInterceptor.execute(LifecycleExecutorInterceptor.java:42)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:333)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:126)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:282)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at hudson.maven.agent.Main.launch(Main.java:133)
at hudson.maven.MavenBuilder.call(MavenBuilder.java:135)
at hudson.maven.MavenModuleSetBuild$Builder.call(MavenModuleSetBuild.java:536)
at hudson.maven.MavenModuleSetBuild$Builder.call(MavenModuleSetBuild.java:482)
at hudson.remoting.UserRequest.perform(UserRequest.java:69)
at hudson.remoting.UserRequest.perform(UserRequest.java:23)
at hudson.remoting.Request$2.run(Request.java:206)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)