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From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12071) Separate out thread pool for Master <-> RegionServer communication
Date Thu, 08 Jan 2015 22:21:35 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12071?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nick Dimiduk updated HBASE-12071:
---------------------------------
    Attachment: 0001-HBASE-12071-Separate-out-thread-pool-for-Master-Regi.patch

Attaching what was pushed to master. Only difference from earlier patch is running protoc
to update the generated files after change to RPC.proto. Did the same for the other branches.

> Separate out thread pool for Master <-> RegionServer communication
> ------------------------------------------------------------------
>
>                 Key: HBASE-12071
>                 URL: https://issues.apache.org/jira/browse/HBASE-12071
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0, 1.1.0
>            Reporter: Sudarshan Kadambi
>            Assignee: Stephen Yuan Jiang
>              Labels: reliablity
>             Fix For: 1.0.0, 2.0.0, 1.1.0
>
>         Attachments: 0001-HBASE-12071-Separate-out-thread-pool-for-Master-Regi.patch,
HBASE-12071.v1-branch-1.patch, HBASE-12071.v2-master.patch, HBASE-12071.v2-master.patch, HBASE-12071.v3-master.patch,
HBASE-12071.v4-master.patch, HBASE-12071.v5-master.patch
>
>
> Over in HBASE-12028, there is a discussion about the case of a RegionServer still being
alive despite all its handler threads being dead. One outcome of this is that the Master is
left hanging on the RS for completion of various operations - such as region un-assignment
when a table is disabled. Does it make sense to create a separate thread pool for communication
between the Master and the RS? This addresses not just the case of the RPC handler threads
terminating but also long-running queries or co-processor executions holding up master operations.



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