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From "Ryan Rawson" <ryano...@gmail.com>
Subject Re: Review Request: [rest] publish endpoint and statistics into ZooKeeper
Date Mon, 18 Oct 2010 22:49:42 GMT

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This is an automatically generated e-mail. To reply, visit:
http://review.cloudera.org/r/1039/#review1565
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Ship it!


- Ryan


On 2010-10-18 14:46:30, Andrew Purtell wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://review.cloudera.org/r/1039/
> -----------------------------------------------------------
> 
> (Updated 2010-10-18 14:46:30)
> 
> 
> Review request for hbase.
> 
> 
> Summary
> -------
> 
> This change allows the REST interface to publish its endpoint and metrics, currently
only requests/sec, into ZooKeeper. By default a permanent znode tree is created as needed
at /hbase/rest/status and Stargate instances create ephemeral children of this with names
in the format <host>:<port>. The ephemeral znodes contain JSON serialized information
about the instance, e.g.
> 
>   {"connector":{"host":"restserver.example.com","port":"8080"},"statistics":{"requests":"13"}}
> 
> The function of Stargate itself is not affected, except for one significant change: now
if the ZooKeeper service is lost, the Stargate instances will abort along with the rest of
HBase.
> 
> 
> This addresses bug HBASE-3119.
>     http://issues.apache.org/jira/browse/HBASE-3119
> 
> 
> Diffs
> -----
> 
>   src/main/java/org/apache/hadoop/hbase/HConstants.java 71c3e7b 
>   src/main/java/org/apache/hadoop/hbase/rest/Main.java 368b4b4 
>   src/main/java/org/apache/hadoop/hbase/rest/RESTServlet.java ed92857 
>   src/main/java/org/apache/hadoop/hbase/rest/metrics/RESTMetrics.java 284bbc5 
> 
> Diff: http://review.cloudera.org/r/1039/diff
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Andrew
> 
>


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