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Posted to issues@hbase.apache.org by "Jean-Daniel Cryans (JIRA)" <ji...@apache.org> on 2010/06/16 19:50:23 UTC
[jira] Created: (HBASE-2737) CME in ZKW introduced in HBASE-2694
CME in ZKW introduced in HBASE-2694
-----------------------------------
Key: HBASE-2737
URL: https://issues.apache.org/jira/browse/HBASE-2737
Project: HBase
Issue Type: Bug
Reporter: Jean-Daniel Cryans
Fix For: 0.21.0
Saw this while tail'ing a log for something else:
{code}
2010-06-15 17:30:03,769 ERROR [main-EventThread] zookeeper.ClientCnxn$EventThread(490): Error while calling watcher
java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.process(ZooKeeperWrapper.java:235)
{code}
Looks like the listeners list's iterator is used in an unprotected manner.
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[jira] Assigned: (HBASE-2737) CME in ZKW introduced in HBASE-2694
Posted by "Jean-Daniel Cryans (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2737?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jean-Daniel Cryans reassigned HBASE-2737:
-----------------------------------------
Assignee: Jonathan Gray
Assigning to Jon so that he takes a look.
> CME in ZKW introduced in HBASE-2694
> -----------------------------------
>
> Key: HBASE-2737
> URL: https://issues.apache.org/jira/browse/HBASE-2737
> Project: HBase
> Issue Type: Bug
> Reporter: Jean-Daniel Cryans
> Assignee: Jonathan Gray
> Fix For: 0.21.0
>
>
> Saw this while tail'ing a log for something else:
> {code}
> 2010-06-15 17:30:03,769 ERROR [main-EventThread] zookeeper.ClientCnxn$EventThread(490): Error while calling watcher
> java.util.ConcurrentModificationException
> at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.process(ZooKeeperWrapper.java:235)
> {code}
> Looks like the listeners list's iterator is used in an unprotected manner.
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[jira] Resolved: (HBASE-2737) CME in ZKW introduced in HBASE-2694
Posted by "Jean-Daniel Cryans (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2737?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jean-Daniel Cryans resolved HBASE-2737.
---------------------------------------
Hadoop Flags: [Reviewed]
Resolution: Fixed
I gave it a spin and everything looks fine, committed to trunk. Thanks for the patch Karthik!
> CME in ZKW introduced in HBASE-2694
> -----------------------------------
>
> Key: HBASE-2737
> URL: https://issues.apache.org/jira/browse/HBASE-2737
> Project: HBase
> Issue Type: Bug
> Reporter: Jean-Daniel Cryans
> Assignee: Karthik Ranganathan
> Fix For: 0.21.0
>
> Attachments: HBASE-2737-0.21.patch
>
>
> Saw this while tail'ing a log for something else:
> {code}
> 2010-06-15 17:30:03,769 ERROR [main-EventThread] zookeeper.ClientCnxn$EventThread(490): Error while calling watcher
> java.util.ConcurrentModificationException
> at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.process(ZooKeeperWrapper.java:235)
> {code}
> Looks like the listeners list's iterator is used in an unprotected manner.
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[jira] Updated: (HBASE-2737) CME in ZKW introduced in HBASE-2694
Posted by "Karthik Ranganathan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2737?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karthik Ranganathan updated HBASE-2737:
---------------------------------------
Attachment: HBASE-2737-0.21.patch
Making the register and unregister methods synchronized. Unit tests are passing. This change is so simple I am not putting it up on review board.
> CME in ZKW introduced in HBASE-2694
> -----------------------------------
>
> Key: HBASE-2737
> URL: https://issues.apache.org/jira/browse/HBASE-2737
> Project: HBase
> Issue Type: Bug
> Reporter: Jean-Daniel Cryans
> Assignee: Karthik Ranganathan
> Fix For: 0.21.0
>
> Attachments: HBASE-2737-0.21.patch
>
>
> Saw this while tail'ing a log for something else:
> {code}
> 2010-06-15 17:30:03,769 ERROR [main-EventThread] zookeeper.ClientCnxn$EventThread(490): Error while calling watcher
> java.util.ConcurrentModificationException
> at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.process(ZooKeeperWrapper.java:235)
> {code}
> Looks like the listeners list's iterator is used in an unprotected manner.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Assigned: (HBASE-2737) CME in ZKW introduced in HBASE-2694
Posted by "Karthik Ranganathan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2737?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karthik Ranganathan reassigned HBASE-2737:
------------------------------------------
Assignee: Karthik Ranganathan (was: Jonathan Gray)
> CME in ZKW introduced in HBASE-2694
> -----------------------------------
>
> Key: HBASE-2737
> URL: https://issues.apache.org/jira/browse/HBASE-2737
> Project: HBase
> Issue Type: Bug
> Reporter: Jean-Daniel Cryans
> Assignee: Karthik Ranganathan
> Fix For: 0.21.0
>
>
> Saw this while tail'ing a log for something else:
> {code}
> 2010-06-15 17:30:03,769 ERROR [main-EventThread] zookeeper.ClientCnxn$EventThread(490): Error while calling watcher
> java.util.ConcurrentModificationException
> at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.process(ZooKeeperWrapper.java:235)
> {code}
> Looks like the listeners list's iterator is used in an unprotected manner.
--
This message is automatically generated by JIRA.
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You can reply to this email to add a comment to the issue online.