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From "takeshi.miao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10147) Canary additions
Date Tue, 31 Dec 2013 04:04:10 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13859314#comment-13859314
] 

takeshi.miao commented on HBASE-10147:
--------------------------------------

hi [~gustavoanatoly],
I just refresh my memory to call out there is a simple way to deal with the public _Sink_
API change is...
to add _deprecate_ on this one obsolete methods in it. for example...
{code}
 public interface Sink {
   public void publishReadFailure(HRegionInfo region, Exception e);
   public void publishReadFailure(HRegionInfo region, HColumnDescriptor column, Exception
e);
   @deprecate // this method will removed in the future release
   public void publishReadTiming(HRegionInfo region, HColumnDescriptor column, long msTime);
   public void publishInfo(HRegionInfo region, ServerName serverName);
   public void publishInfoTimeout(HRegionInfo region, ServerName serverName);
 }
{code}

> Canary additions
> ----------------
>
>                 Key: HBASE-10147
>                 URL: https://issues.apache.org/jira/browse/HBASE-10147
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: stack
>            Assignee: Gustavo Anatoly
>         Attachments: HBASE-10147-v2.patch, HBASE-10147.patch, HBASE-10147.patch, HBASE-10147.patch,
HBASE-10147.patch
>
>
> I've been using the canary to quickly identify the dodgy machine in my cluster.  It is
useful for this.  What would  make it better would be:
> + Rather than saying how long it took to get a region after you have gotten the region,
it'd be sweet to log BEFORE you went to get the region the regionname and the server it is
on.  I ask for this because as is, I have to wait for the canary to timeout which can be a
while.
> + Second ask is that when I pass the -t, that when it fails, it says what it failed against
-- what region and hopefully what server location (might be hard).



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