[
https://issues.apache.org/jira/browse/HBASE-12071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14267170#comment-14267170
]
Stephen Yuan Jiang commented on HBASE-12071:
--------------------------------------------
[~ndimiduk] To answer your comments, I increased the queues count to 2 to make
it more scalable; this is an arbitrary number, ideally it should be tunable,
but I am not going far for now.
The major goal is to make admin requests using priorityExecutor - I stepped
through the code in debugger and verified the results by running relevant Unit
Tests. So funcational-wise, it works as expected. Since I have not run system
tests (stress tests), whether this change solves customers problem is unknown.
We will run system tests in a late cycle to see the results. At least it will
not get worse comparing to pre-change.
> 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: 2.0.0, 1.1.0
>
> Attachments: 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
