Gradle build failure due to ParallelProjectExecutionIntegrationTest

ParallelProjectExecutionIntegrationTest Failure

Class org.gradle.integtests.ParallelProjectExecutionIntegrationTest

org.gradle.listener.ListenerNotificationException: Failed to notify action.
  at org.gradle.listener.BroadcastDispatch.dispatch(BroadcastDispatch.java:90)
	at org.gradle.listener.BroadcastDispatch.dispatch(BroadcastDispatch.java:30)
	at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
	at org.gradle.listener.ActionBroadcast.execute(ActionBroadcast.java:24)
	at org.gradle.integtests.fixtures.executer.InProcessGradleExecuter.assertResult(InProcessGradleExecuter.java:110)
	at org.gradle.integtests.fixtures.executer.InProcessGradleExecuter.doRun(InProcessGradleExecuter.java:91)
	at org.gradle.integtests.fixtures.executer.AbstractGradleExecuter.run(AbstractGradleExecuter.java:528)
	at org.gradle.integtests.fixtures.executer.AbstractDelegatingGradleExecuter.doRun(AbstractDelegatingGradleExecuter.java:29)
	at org.gradle.integtests.fixtures.executer.AbstractGradleExecuter.run(AbstractGradleExecuter.java:528)
	at org.gradle.integtests.fixtures.AbstractIntegrationSpec.succeeds(AbstractIntegrationSpec.groovy:101)
	at org.gradle.integtests.fixtures.AbstractIntegrationSpec.run(AbstractIntegrationSpec.groovy:88)
	at org.gradle.integtests.ParallelProjectExecutionIntegrationTest.executes dependency project targets concurrently(ParallelProjectExecutionIntegrationTest.groovy:52)
Caused by: java.lang.AssertionError: Standard error contains an unexpected stack trace:
=====
/:c
java.lang.AssertionError: Timeout waiting for all concurrent requests. Waiting for [:d], received [:c, :b].
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
	at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:77)
	at org.codehaus.groovy.reflection.CachedConstructor.doConstructorInvoke(CachedConstructor.java:71)
	at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrap.callConstructor(ConstructorSite.java:81)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:54)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:182)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:190)
	at org.gradle.test.fixtures.server.http.BlockingHttpServer$CyclicBarrierRequestHandler.handle(BlockingHttpServer.groovy:116)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:326)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
	at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
/:b
java.lang.AssertionError: Timeout waiting for all concurrent requests. Waiting for [:d], received [:c, :b].
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
	at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:77)
	at org.codehaus.groovy.reflection.CachedConstructor.doConstructorInvoke(CachedConstructor.java:71)
	at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrap.callConstructor(ConstructorSite.java:81)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:190)
	at org.gradle.test.fixtures.server.http.BlockingHttpServer$CyclicBarrierRequestHandler.handle(BlockingHttpServer.groovy:116)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:326)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
	at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

=====

	at org.gradle.integtests.fixtures.executer.AbstractGradleExecuter$1.assertNoStackTraces(AbstractGradleExecuter.java:593)
	at org.gradle.integtests.fixtures.executer.AbstractGradleExecuter$1.execute(AbstractGradleExecuter.java:588)
	at org.gradle.integtests.fixtures.executer.AbstractGradleExecuter$1.execute(AbstractGradleExecuter.java:576)
	at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
	at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.listener.BroadcastDispatch.dispatch(BroadcastDispatch.java:81)
	... 11 more