You are viewing a plain text version of this content. The canonical link for it is here.

Posted to common-issues@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2013/09/04 19:28:51 UTC

[jira] [Commented] (HADOOP-9932) Name node crashes due to improper synchronization in RetryCache

    [ https://issues.apache.org/jira/browse/HADOOP-9932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757995#comment-13757995 ] 

Kihwal Lee commented on HADOOP-9932:
------------------------------------

I've moved this jira to hadoop common.
                
> Name node crashes due to improper synchronization in RetryCache
> ---------------------------------------------------------------
>
>                 Key: HADOOP-9932
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9932
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Kihwal Lee
>            Priority: Blocker
>
> In LightWeightCache#evictExpiredEntries(), the precondition check can fail. [~patwhitey2007] ran a HA failover test and it occurred while the SBN was catching up with edits during a transition to active. This caused NN to terminate.
> Here is my theory: If an RPC handler calls waitForCompletion() and it happens to remove the head of the queue in get(), it will race with evictExpiredEntries() frrom put().

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira