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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6165) Replication can overrun .META. scans on cluster re-start
Date Mon, 10 Sep 2012 21:58:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13452491#comment-13452491

Jean-Daniel Cryans commented on HBASE-6165:

[~whitingj], originally replication was using the normal handlers and was just deadlocking
the clusters in a different way. ReplicationSink uses the HBase client which can block for
ungodly amounts of time so it would fill up the handlers and the RS would stop serving requests.
HBASE-6550 changed the latter that a bit by setting low timeouts via replication-specific
client-side configuration parameters (if it was using the normal client configurations it
would also affect all the other clients). With HBASE-6165 it's even safer since replication
is sandboxed.
> Replication can overrun .META. scans on cluster re-start
> --------------------------------------------------------
>                 Key: HBASE-6165
>                 URL: https://issues.apache.org/jira/browse/HBASE-6165
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Elliott Clark
>            Assignee: Himanshu Vashishtha
>             Fix For: 0.96.0, 0.94.2
>         Attachments: 6165-v6.txt, HBase-6165-94-v1.patch, HBase-6165-94-v2.patch, HBase-6165-v1.patch,
HBase-6165-v2.patch, HBase-6165-v3.patch, HBase-6165-v4.patch, HBase-6165-v5.patch
> When restarting a large set of regions on a reasonably small cluster the replication
from another cluster tied up every xceiver meaning nothing could be onlined.

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