[jira] [Commented] (HBASE-14922) Delayed flush doesn't work causing flush storms.

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-14922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15038670#comment-15038670 ] 

Hadoop QA commented on HBASE-14922:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12775629/HBASE-14922-v1.patch
  against master branch at commit a154ecda00d9d9a58e83d322dae7ffd3518b633c.
  ATTACHMENT ID: 12775629

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 4 new or modified tests.

    {color:green}+1 hadoop versions{color}. The patch compiles with all supported hadoop versions (2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.6.1 2.7.0 2.7.1)

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of javac compiler warnings.

    {color:green}+1 protoc{color}.  The applied patch does not increase the total number of protoc compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

                {color:red}-1 checkstyle{color}.  The applied patch generated new checkstyle errors. Check build console for list of new errors.

    {color:green}+1 findbugs{color}.  The patch does not introduce any  new Findbugs (version 2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

  {color:green}+1 site{color}.  The mvn post-site goal succeeds with this patch.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .
        {color:green}+1 core zombie tests -- no zombies!{color}.

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/16760//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/16760//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/16760//artifact/patchprocess/checkstyle-aggregate.html

                Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/16760//console

This message is automatically generated.

> Delayed flush doesn't work causing flush storms.
> ------------------------------------------------
>
>                 Key: HBASE-14922
>                 URL: https://issues.apache.org/jira/browse/HBASE-14922
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 2.0.0, 1.2.0, 1.1.2
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>
>         Attachments: HBASE-14922-v1.patch, HBASE-14922.patch
>
>
> Starting all regionservers at the same time will mean that most PeriodicMemstoreFlusher's will be running at the same time. So all of these threads will queue flushes at about the same time.
> This was supposed to be mitigated by Delayed. However that isn't nearly enough. This results in the immediate filling up and then draining of the flush queues every hour.



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