My platform is OS X 10.5.6 running Java 1.5.0_16 and Maven 2.0.9.  When I run Maven for a build I get no failures in the unit tests but I get numerous errors which leads to a build failure.  The command line was simply

mvn clean install

The end of the JUnit report is:

=====================
Results :

Tests in error:
  testTaskMultipleActors(org.drools.process.workitem.wsht.WSHumanTaskHandlerTest)
  testTaskFail(org.drools.process.workitem.wsht.WSHumanTaskHandlerTest)
  testTaskSkip(org.drools.process.workitem.wsht.WSHumanTaskHandlerTest)
  testTaskAbortSkippable(org.drools.process.workitem.wsht.WSHumanTaskHandlerTest)
  testTaskAbortNotSkippable(org.drools.process.workitem.wsht.WSHumanTaskHandlerTest)
  testTaskData(org.drools.process.workitem.wsht.WSHumanTaskHandlerTest)
  testAddRemoveComment(org.drools.task.service.TaskServiceCommentsAndAttachmentsTest)
  testAddRemoveAttachment(org.drools.task.service.TaskServiceCommentsAndAttachmentsTest)
  testLifeCycle(org.drools.task.service.TaskLifeCycleTest)
  testLifeCycleMultipleTasks(org.drools.task.service.TaskLifeCycleTest)
  testNewTaskWithNoPotentialOwners(org.drools.task.service.TaskServiceLifeCycleTest)
  testNewTaskWithSinglePotentialOwner(org.drools.task.service.TaskServiceLifeCycleTest)
  testNewTaskWithContent(org.drools.task.service.TaskServiceLifeCycleTest)
  testClaimWithMultiplePotentialOwners(org.drools.task.service.TaskServiceLifeCycleTest)
  testStartFromReadyStateWithPotentialOwner(org.drools.task.service.TaskServiceLifeCycle\
Test)
  testStartFromReadyStateWithIncorrectPotentialOwner(org.drools.task.service.TaskService\
LifeCycleTest)
  testStartFromReserved(org.drools.task.service.TaskServiceLifeCycleTest)
  testStartFromReservedWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycleTes\
t)
  testStop(org.drools.task.service.TaskServiceLifeCycleTest)
  testStopWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycleTest)
  testReleaseFromInprogress(org.drools.task.service.TaskServiceLifeCycleTest)
  testReleaseFromReserved(org.drools.task.service.TaskServiceLifeCycleTest)
  testReleaseWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycleTest)
  testSuspendFromReady(org.drools.task.service.TaskServiceLifeCycleTest)
  testSuspendFromReserved(org.drools.task.service.TaskServiceLifeCycleTest)
  testSuspendFromReservedWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycleT\
est)
  testResumeFromReady(org.drools.task.service.TaskServiceLifeCycleTest)
  testResumeFromReserved(org.drools.task.service.TaskServiceLifeCycleTest)
  testResumeFromReservedWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycleTe\
st)
  testSkipFromReady(org.drools.task.service.TaskServiceLifeCycleTest)
  testSkipFromReserved(org.drools.task.service.TaskServiceLifeCycleTest)
  testDelegateFromReady(org.drools.task.service.TaskServiceLifeCycleTest)
  testDelegateFromReserved(org.drools.task.service.TaskServiceLifeCycleTest)
  testDelegateFromReservedWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycle\
Test)
  testForwardFromReady(org.drools.task.service.TaskServiceLifeCycleTest)
  testForwardFromReserved(org.drools.task.service.TaskServiceLifeCycleTest)
  testForwardFromReservedWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycleT\
est)
  testComplete(org.drools.task.service.TaskServiceLifeCycleTest)
  testCompleteWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycleTest)
  testCompleteWithContent(org.drools.task.service.TaskServiceLifeCycleTest)
  testFail(org.drools.task.service.TaskServiceLifeCycleTest)
  testFailWithIncorrectUser(org.drools.task.service.TaskServiceLifeCycleTest)
  testFailWithContent(org.drools.task.service.TaskServiceLifeCycleTest)
  testSendWithStartandEndDeadline(org.drools.task.service.IcalTest)
  testSendWithStartDeadline(org.drools.task.service.IcalTest)
  testSendWithEndDeadline(org.drools.task.service.IcalTest)
  testSendWithNoDeadline(org.drools.task.service.IcalTest)
  testClaimEvent(org.drools.task.service.TaskServiceEventMessagingTest)
  testDelayedEmailNotificationOnDeadline(org.drools.task.service.TaskServiceDeadlinesTes\
t)
  testDelayedReassignmentOnDeadline(org.drools.task.service.TaskServiceDeadlinesTest)
  testTasksOwnedQueryWithI18N(org.drools.task.service.TaskServiceTest)
  testPeopleAssignmentQueries(org.drools.task.service.TaskServiceTest)

Tests run: 58, Failures: 0, Errors: 52, Skipped: 0
=====================
Looking at the trace I see a number of exceptions that look similar.  Does the following exception indicate a root cause that may resolve this issue?  Or do the above errors indicate another problem? 

Thanks!
=====================
...
Jan 27, 2009 7:57:17 PM org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: schema export complete
Exception in thread "Thread-5" java.lang.RuntimeException: Server Exception with class c\
lass org.drools.task.service.MinaTaskServer using port 9123
        at org.drools.task.service.BaseMinaServer.run(BaseMinaServer.java:38)
        at java.lang.Thread.run(Thread.java:613)
Caused by: java.net.BindException: Address already in use
        at sun.nio.ch.Net.bind(Native Method)
        at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
        at org.apache.mina.transport.socket.nio.NioSocketAcceptor.open(NioSocketAcceptor\
.java:235)
        at org.apache.mina.transport.socket.nio.NioSocketAcceptor.open(NioSocketAcceptor\
.java:48)
        at org.apache.mina.core.polling.AbstractPollingIoAcceptor.registerHandles(Abstra\
ctPollingIoAcceptor.java:485)
        at org.apache.mina.core.polling.AbstractPollingIoAcceptor.access$200(AbstractPol\
lingIoAcceptor.java:67)
        at org.apache.mina.core.polling.AbstractPollingIoAcceptor$Worker.run(AbstractPol\
lingIoAcceptor.java:385)
        at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:5\
1)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.jav\
a:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:67\
5)
        ... 1 more
Jan 27, 2009 7:57:18 PM org.hibernate.impl.SessionFactoryImpl close
[...]
[ stack trace above repeated 4 more times]
INFO: Mapping collection: org.drools.task.Notification.descriptions -> I18NText
Jan 27, 2009 7:57:26 PM org.hibernate.cfg.annotations.CollectionBinder bindOneToManySeco\
ndPass
Tests run: 7, Failures: 0, Errors: 6, Skipped: 0, Time elapsed: 14.42 sec <<< FAILURE!
Running org.drools.task.service.TaskServiceCommentsAndAttachmentsTest
[... more intermittent exceptions with stack traces ...]