[OAK-187] ConcurrentModificationException during gc run

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.4
• Component/s: mk
• Assignee: Dominique Pfister
• Reporter: Michael Dürig
• Created: 13/Jul/12 15:33
• Updated: 14/Aug/12 09:28
• Resolved: 25/Jul/12 15:19

Description

I sporadically encounter a ConcurrentModificationException when building with -PintegrationTesting. This happens while the JcrTckTest suite runs and is only printed to the console. No tests fail.

Running org.apache.jackrabbit.oak.jcr.JcrTckIT
java.util.ConcurrentModificationException
	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
	at java.util.TreeMap$EntryIterator.next(TreeMap.java:1136)
	at java.util.TreeMap$EntryIterator.next(TreeMap.java:1131)
	at org.apache.jackrabbit.mk.store.DefaultRevisionStore.markBranches(DefaultRevisionStore.java:562)
	at org.apache.jackrabbit.mk.store.DefaultRevisionStore.gc(DefaultRevisionStore.java:498)
	at org.apache.jackrabbit.mk.store.DefaultRevisionStore$2.run(DefaultRevisionStore.java:160)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
	at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:680)
Tests run: 1906, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 65.443 sec