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https://issues.apache.org/jira/browse/HBASE-21126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16720790#comment-16720790
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Hudson commented on HBASE-21126:
--------------------------------
SUCCESS: Integrated in Jenkins build HBase-1.3-IT #509 (See
[https://builds.apache.org/job/HBase-1.3-IT/509/])
HBASE-21126 Configurable number of allowed failures for ZooKeeper Canary
(apurtell: rev 09069df2f8a9cb19ce368a54770d333f0e36fe5d)
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/tool/Canary.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/tool/TestCanaryTool.java
> Add ability for HBase Canary to ignore a configurable number of ZooKeeper
> down nodes
> ------------------------------------------------------------------------------------
>
> Key: HBASE-21126
> URL: https://issues.apache.org/jira/browse/HBASE-21126
> Project: HBase
> Issue Type: Improvement
> Components: canary, Zookeeper
> Affects Versions: 1.0.0, 3.0.0, 2.0.0
> Reporter: David Manning
> Assignee: David Manning
> Priority: Minor
> Fix For: 3.0.0, 1.5.0, 2.2.0
>
> Attachments: HBASE-21126.branch-1.001.patch,
> HBASE-21126.master.001.patch, HBASE-21126.master.002.patch,
> HBASE-21126.master.003.patch, zookeeperCanaryLocalTestValidation.txt
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> When running org.apache.hadoop.hbase.tool.Canary with args -zookeeper
> -treatFailureAsError, the Canary will try to get a znode from each ZooKeeper
> server in the ensemble. If any server is unavailable or unresponsive, the
> canary will exit with a failure code.
> If we use the Canary to gauge server health, and alert accordingly, this can
> be too strict. For example, in a 5-node ZooKeeper cluster, having one node
> down is safe and expected in rolling upgrades/patches.
> This is a request to allow the Canary to take another parameter
> {code:java}
> -permittedZookeeperFailures <N>{code}
> If N=1, in the 5-node ZooKeeper ensemble example, then the Canary will still
> pass if 4 ZooKeeper nodes are reachable, but fail if 3 or fewer are reachable.
> (This is my first Jira posting... sorry if I messed anything up.)
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