[jira] [Resolved] (HDFS-14776) Log more detail for slow RPC

["Chen Zhang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-14776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chen Zhang resolved HDFS-14776.
-------------------------------
    Resolution: Abandoned

> Log more detail for slow RPC
> ----------------------------
>
>                 Key: HDFS-14776
>                 URL: https://issues.apache.org/jira/browse/HDFS-14776
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Chen Zhang
>            Priority: Major
>
> Current implementation only log process time
> {code:java}
> if ((rpcMetrics.getProcessingSampleCount() > minSampleSize) &&
>     (processingTime > threeSigma)) {
>   LOG.warn("Slow RPC : {} took {} {} to process from client {}",
>       methodName, processingTime, RpcMetrics.TIMEUNIT, call);
>   rpcMetrics.incrSlowRpc();
> }
> {code}
> We need to log more details to help us locate the problem (eg. how long it take to request lock, holding lock, or do other things)



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