Tests run: 4, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.723 
sec <<< FAILURE!
testConcurrentMergeGC(org.apache.jackrabbit.mk.store.DefaultRevisionStoreTest) 
 Time elapsed: 0.737 sec  <<< ERROR!
org.apache.jackrabbit.mk.api.MicroKernelException: 
java.lang.RuntimeException: Unexpected error
	at 
org.apache.jackrabbit.mk.core.MicroKernelImpl.merge(MicroKernelImpl.java:504)
	at 
org.apache.jackrabbit.mk.store.DefaultRevisionStoreTest.testConcurrentMergeGC(DefaultRevisionStoreTest.java:184)
	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:597)
	at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
	at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
	at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
	at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
	at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
	at 
org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
	at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
	at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at 
org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
	at 
org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
	at 
org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:172)
	at 
org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:104)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:70)
Caused by: java.lang.RuntimeException: Unexpected error
	at 
org.apache.jackrabbit.mk.store.StoredNodeAsState$3.getNode(StoredNodeAsState.java:176)
	at 
org.apache.jackrabbit.mk.store.StoredNodeAsState.getChildNode(StoredNodeAsState.java:120)
	at 
org.apache.jackrabbit.mk.store.DefaultRevisionStore$3.childNodeChanged(DefaultRevisionStore.java:476)
	at org.apache.jackrabbit.mk.model.AbstractNode.diff(AbstractNode.java:126)
	at 
org.apache.jackrabbit.mk.store.DefaultRevisionStore.compare(DefaultRevisionStore.java:443)
	at org.apache.jackrabbit.mk.model.NodeDelta.<init>(NodeDelta.java:68)
	at 
org.apache.jackrabbit.mk.model.CommitBuilder.mergeNode(CommitBuilder.java:371)
	at 
org.apache.jackrabbit.mk.model.CommitBuilder.mergeTree(CommitBuilder.java:363)
	at 
org.apache.jackrabbit.mk.model.CommitBuilder.doMerge(CommitBuilder.java:216)
	at 
org.apache.jackrabbit.mk.core.MicroKernelImpl.merge(MicroKernelImpl.java:502)
	... 32 more
Caused by: org.apache.jackrabbit.mk.store.NotFoundException: 
0a9706e6ec0320c779cd6f775910826e79c97f58
	at 
org.apache.jackrabbit.mk.persistence.InMemPersistence.readNode(InMemPersistence.java:70)
	at 
org.apache.jackrabbit.mk.store.DefaultRevisionStore.getNode(DefaultRevisionStore.java:341)
	at 
org.apache.jackrabbit.mk.store.StoredNodeAsState$3.getNode(StoredNodeAsState.java:173)
	... 41 more