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From "Sreeram Venkatasubramanian (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16290) Dump summary of callQueue content; can help debugging
Date Tue, 17 Oct 2017 03:12:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16206949#comment-16206949
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Sreeram Venkatasubramanian commented on HBASE-16290:
----------------------------------------------------

Hi [~chia7712], I have implemented the suggested change for FifoRpcScheduler. FifoRpcScheduler
uses ThreadPoolExecutor. Unlike SimpleRpcScheduler, there seems to be no easy way to unit
test the number of tasks inside ThreadPoolExecutor. Minimum of 1 worker task always runs in
ThreadPoolExecutor and it consumes some tasks from the work queue. So the input number of
tasks does not end up matching with the tasks held by ThreadPoolExecutor (which is lesser
in number). Any suggestions on this ?

> Dump summary of callQueue content; can help debugging
> -----------------------------------------------------
>
>                 Key: HBASE-16290
>                 URL: https://issues.apache.org/jira/browse/HBASE-16290
>             Project: HBase
>          Issue Type: Bug
>          Components: Operability
>    Affects Versions: 2.0.0
>            Reporter: stack
>            Assignee: Sreeram Venkatasubramanian
>              Labels: beginner
>             Fix For: 2.0.0
>
>         Attachments: DebugDump_screenshot.png, HBASE-16290.master.001.patch, HBASE-16290.master.002.patch,
HBASE-16290.master.003.patch, HBASE-16290.master.004.patch, HBASE-16290.master.005.patch,
Sample Summary.txt
>
>
> Being able to get a clue what is in a backedup callQueue could give insight on what is
going on on a jacked server. Just needs to summarize count, sizes, call types. Useful debugging.
In a servlet?



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