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https://issues.apache.org/jira/browse/HBASE-13996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14708181#comment-14708181
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Hudson commented on HBASE-13996:
--------------------------------
FAILURE: Integrated in HBase-0.98 #1095 (See
[https://builds.apache.org/job/HBase-0.98/1095/])
HBASE-13996 Add write sniffing in canary (Liu Shaohui) (apurtell: rev
216dbbc2fd16cd5ce0b1aaaaddc4e5bdf634e32e)
* hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
*
hbase-server/src/main/jamon/org/apache/hadoop/hbase/tmpl/master/MasterStatusTmpl.jamon
* src/main/asciidoc/_chapters/ops_mgt.adoc
* hbase-server/src/main/java/org/apache/hadoop/hbase/tool/Canary.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java
> 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, 0.98.14, 1.2.0, 1.3.0
>
> Attachments: HBASE-13996-0.98.patch, HBASE-13996-branch-1.patch,
> 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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