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From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8321) Log split worker should heartbeat to avoid timeout
Date Mon, 15 Apr 2013 18:26:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13631980#comment-13631980
] 

Jeffrey Zhong commented on HBASE-8321:
--------------------------------------

The semantics of the existing heartbeat is progress heart beat, if we got a slow worker we
can re-assigne the work to others. It also guards the scenario when a splitlogworker dies.
After the patch, it seems to me we lose both functionalities. Even when splitworker dies,
do still we get heart beats from the chore?

Thanks,
-Jeffrey
                
> Log split worker should heartbeat to avoid timeout
> --------------------------------------------------
>
>                 Key: HBASE-8321
>                 URL: https://issues.apache.org/jira/browse/HBASE-8321
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>         Attachments: trunk-8321_v1.patch
>
>
> Currently, hlog splitter could spend quite sometime to split a log in case any HDFS issue
and recoverLease/retry opening is needed.  If distributed log split manager times out the
log worker, other log worker to take over will run into the same issue.
> Ideally, we should not need a timeout monitor.  Since we have a timeout monitor for DSL
now, the worker should heartbeat to avoid wrong/unneeded timeouts.

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