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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6550) Refactoring ReplicationSink to make it more responsive of cluster health
Date Wed, 15 Aug 2012 02:27:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434761#comment-13434761
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Lars Hofhansl commented on HBASE-6550:
--------------------------------------

Oh yeah, the conf must be cloned (like the first version of the patch.)
"exec" and "con" are my fault :)

                
> Refactoring ReplicationSink to make it more responsive of cluster health
> ------------------------------------------------------------------------
>
>                 Key: HBASE-6550
>                 URL: https://issues.apache.org/jira/browse/HBASE-6550
>             Project: HBase
>          Issue Type: New Feature
>          Components: replication
>            Reporter: Himanshu Vashishtha
>            Assignee: Himanshu Vashishtha
>         Attachments: 6550-havealook.txt, HBase-6550.patch, HBase-6550-v1.patch, HBase-6550-v3.patch
>
>
> ReplicationSink replicates the WALEdits in the local cluster. It uses native HBase client
to insert the mutations. Sometime, it takes a while to process it (may be due to region splitting,
gc pause, etc) and it undergoes the retrial phase. 
> It has two repercussions:
> a) The regionserver handler which is serving the request (till now, a priority handler)
is blocked for this period.
> b) The caller may get timed out and it will retry it anyway, but the handler serving
the ReplicationSink requests is still working.
> Refactoring ReplicationSink to have the following features:
> a) Making it more configurable (have its own number of retrial limit, connection timeout,
etc)
> b) Add a fail fast behavior so that it bails out in case caller is timedout, or any exception
in processing the mutation batch.

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