You are viewing a plain text version of this content. The canonical link for it is here.
Posted to oak-dev@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2012/07/13 17:33:34 UTC
[jira] [Created] (OAK-187) ConcurrentModificationException during
gc run
Michael Dürig created OAK-187:
---------------------------------
Summary: ConcurrentModificationException during gc run
Key: OAK-187
URL: https://issues.apache.org/jira/browse/OAK-187
Project: Jackrabbit Oak
Issue Type: Bug
Components: mk
Reporter: Michael Dürig
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.
{code}
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$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
Tests run: 1906, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 65.443 sec
{code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Resolved] (OAK-187) ConcurrentModificationException during
gc run
Posted by "Dominique Pfister (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/OAK-187?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dominique Pfister resolved OAK-187.
-----------------------------------
Resolution: Fixed
Assignee: Dominique Pfister
Fixed in revision 1365621.
> ConcurrentModificationException during gc run
> ---------------------------------------------
>
> Key: OAK-187
> URL: https://issues.apache.org/jira/browse/OAK-187
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: mk
> Reporter: Michael Dürig
> Assignee: Dominique Pfister
>
> I sporadically encounter a {{ConcurrentModificationException}} when building with {{-PintegrationTesting}}. This happens while the {{JcrTckTest}} suite runs and is only printed to the console. No tests fail.
> {code}
> Running org.apache.jackrabbit.oak.jcr.JcrTckIT
> java.util.ConcurrentModificationException
> at java.util.TreeMap$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$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:680)
> Tests run: 1906, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 65.443 sec
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Commented] (OAK-187) ConcurrentModificationException during
gc run
Posted by "Michael Dürig (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/OAK-187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13422340#comment-13422340 ]
Michael Dürig commented on OAK-187:
-----------------------------------
I suspect this is an issue with concurrent access to the {{branches}} map in {{DefaultRevisionStore}}: when a new branch is added/removed while {{markBranches}} iterates over the entry set this exception is likely to occur.
> ConcurrentModificationException during gc run
> ---------------------------------------------
>
> Key: OAK-187
> URL: https://issues.apache.org/jira/browse/OAK-187
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: mk
> Reporter: Michael Dürig
>
> I sporadically encounter a {{ConcurrentModificationException}} when building with {{-PintegrationTesting}}. This happens while the {{JcrTckTest}} suite runs and is only printed to the console. No tests fail.
> {code}
> Running org.apache.jackrabbit.oak.jcr.JcrTckIT
> java.util.ConcurrentModificationException
> at java.util.TreeMap$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$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:680)
> Tests run: 1906, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 65.443 sec
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Commented] (OAK-187) ConcurrentModificationException during
gc run
Posted by "Julian Reschke (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/OAK-187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420730#comment-13420730 ]
Julian Reschke commented on OAK-187:
------------------------------------
Saw that today as well.
> ConcurrentModificationException during gc run
> ---------------------------------------------
>
> Key: OAK-187
> URL: https://issues.apache.org/jira/browse/OAK-187
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: mk
> Reporter: Michael Dürig
>
> I sporadically encounter a {{ConcurrentModificationException}} when building with {{-PintegrationTesting}}. This happens while the {{JcrTckTest}} suite runs and is only printed to the console. No tests fail.
> {code}
> Running org.apache.jackrabbit.oak.jcr.JcrTckIT
> java.util.ConcurrentModificationException
> at java.util.TreeMap$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
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira