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

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

Chen Zhang created HDFS-14776:
---------------------------------

             Summary: 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


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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