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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13996) Add write sniffing in canary
Date Fri, 21 Aug 2015 20:45:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14707428#comment-14707428
] 

Hadoop QA commented on HBASE-13996:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12751701/HBASE-13996-v004.diff
  against master branch at commit bcef28eefaf192b0ad48c8011f98b8e944340da5.
  ATTACHMENT ID: 12751701

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

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {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 2.7.0)

    {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:red}-1 javadoc{color}.  The javadoc tool appears to have generated 2 warning messages.

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the total number
of checkstyle 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:red}-1 core tests{color}.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.regionserver.TestSplitTransactionOnCluster

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/15204//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/15204//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/15204//artifact/patchprocess/checkstyle-aggregate.html

  Javadoc warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/15204//artifact/patchprocess/patchJavadocWarnings.txt
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/15204//console

This message is automatically generated.

> Add write sniffing in canary
> ----------------------------
>
>                 Key: HBASE-13996
>                 URL: https://issues.apache.org/jira/browse/HBASE-13996
>             Project: HBase
>          Issue Type: Improvement
>          Components: canary
>    Affects Versions: 0.98.13, 1.1.0.1
>            Reporter: Liu Shaohui
>            Assignee: Liu Shaohui
>             Fix For: 2.0.0, 1.3.0, 0.98.15
>
>         Attachments: HBASE-13996-v001.diff, HBASE-13996-v002.diff, HBASE-13996-v003.diff,
HBASE-13996-v004.diff
>
>
> Currently the canary tool only sniff the read operations, it's hard to finding the problem
in write path. 
> To support the write sniffing, we create a system table named '_canary_'  in the canary
tool. And the tool will make sure that the region number is large than the number of the regionserver
and the regions will be distributed onto all regionservers.
> Periodically, the tool will put data to these regions to calculate the write availability
of HBase and send alerts if needed.



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