[jira] [Assigned] (HBASE-14703) update the per-region stats twice for the call on return

["Heng Chen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-14703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Heng Chen reassigned HBASE-14703:
---------------------------------

    Assignee: Heng Chen

> update the per-region stats twice for the call on return
> --------------------------------------------------------
>
>                 Key: HBASE-14703
>                 URL: https://issues.apache.org/jira/browse/HBASE-14703
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Heng Chen
>            Assignee: Heng Chen
>         Attachments: HBASE-14703.patch
>
>
> In {{AsyncProcess.SingleServerRequestRunnable}}, it seems we update serverStatistics twice.
> The first one is that we wrapper {{RetryingCallable}}  by {{StatsTrackingRpcRetryingCaller}}, and do serverStatistics update when we call {{callWithRetries}} and {{callWithoutRetries}}. Relates code like below:
> {code}
>   @Override
>   public T callWithRetries(RetryingCallable<T> callable, int callTimeout)
>       throws IOException, RuntimeException {
>     T result = delegate.callWithRetries(callable, callTimeout);
>     return updateStatsAndUnwrap(result, callable);
>   }
>   @Override
>   public T callWithoutRetries(RetryingCallable<T> callable, int callTimeout)
>       throws IOException, RuntimeException {
>     T result = delegate.callWithRetries(callable, callTimeout);
>     return updateStatsAndUnwrap(result, callable);
>   }
> {code}
> The secondary one is after we get response, in {{receiveMultiAction}}, we do update again. 
> {code}
> // update the stats about the region, if its a user table. We don't want to slow down
> // updates to meta tables, especially from internal updates (master, etc).
> if (AsyncProcess.this.connection.getStatisticsTracker() != null) {
>   result = ResultStatsUtil.updateStats(result,
>   AsyncProcess.this.connection.getStatisticsTracker(), server, regionName);
> }
> {code}
> It seems that {{StatsTrackingRpcRetryingCaller}} is NOT necessary,  remove it?



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)