Hi all,

Trying to upgrade Hadoop to 1.0.x, we found that the shuffleInput metric (for each reduce task) is not under the “mapred” context, according to the following implementation in ReduceTask.java. Currently, the ShuffleInput metric is under “default” context, since it is not set explicitly.

Consequently, we cannot have “Hadoop_mapred_shuffleInput” directory under repos/*/ folder.

{
final MetricsRegistry registry = new MetricsRegistry("shuffleInput");
      final MetricMutableCounterLong inputBytes           registry.newCounter("shuffle_input_bytes", "", 0L);
      final MetricMutableCounterInt failedFetches           registry.newCounter("shuffle_failed_fetches", "", 0);
      final MetricMutableCounterInt successFetches           registry.newCounter("shuffle_success_fetches", "", 0);
      private volatile int threadsBusy = 0;

      @SuppressWarnings("deprecation")
      ShuffleClientInstrumentation(JobConf conf) {
        registry.tag("user", "User name", conf.getUser())
                .tag("jobName", "Job name", conf.getJobName())
                .tag("jobId", "Job ID", ReduceTask.this.getJobID().toString())
                .tag("taskId", "Task ID", getTaskID().toString())
                .tag("sessionId", "Session ID", conf.getSessionId());
      }
}

Thank you && Best Regards,
Grace （Huang Jie)
---------------------------------------------------------------------
SSG PRC Cloud Computing
Intel Asia-Pacific Research & Development Ltd.
No. 880 Zi Xing Road
Shanghai, PRC, 200241
Phone: (86-21) 61166031

Aha.  Do you have a proposed fix for the problem?

--Ari

On Mon, Jul 16, 2012 at 10:16 PM, Huang, Jie <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> Trying to upgrade Hadoop to 1.0.x, we found that the shuffleInput metric (for each reduce task) is not under the “mapred” context, according to the following implementation in ReduceTask.java. Currently, the ShuffleInput metric is under “default” context, since it is not set explicitly.
>
> Consequently, we cannot have “Hadoop_mapred_shuffleInput” directory under repos/*/ folder.
--
Ari Rabkin [EMAIL PROTECTED]
Princeton Computer Science Department

We'd better to do the modification in Hadoop side, like:

{
 final MetricsRegistry registry = new MetricsRegistry("shuffleInput");
      final MetricMutableCounterLong inputBytes           registry.newCounter("shuffle_input_bytes", "", 0L);
      final MetricMutableCounterInt failedFetches           registry.newCounter("shuffle_failed_fetches", "", 0);
      final MetricMutableCounterInt successFetches           registry.newCounter("shuffle_success_fetches", "", 0);
      private volatile int threadsBusy = 0;

      @SuppressWarnings("deprecation")
      ShuffleClientInstrumentation(JobConf conf) {
        registry.setContext("mapred")   <<< fix point
.tag("user", "User name", conf.getUser())
                .tag("jobName", "Job name", conf.getJobName())
                .tag("jobId", "Job ID", ReduceTask.this.getJobID().toString())
                .tag("taskId", "Task ID", getTaskID().toString())
                .tag("sessionId", "Session ID", conf.getSessionId());
      }
}

Thank you && Best Regards,
Grace （Huang Jie)
-----Original Message-----
From: Ariel Rabkin [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 17, 2012 10:33 AM
To: [EMAIL PROTECTED]
Subject: Re: ShuffleInput is not under the "mapred" context since Hadoop 1.0 metrics2

Aha.  Do you have a proposed fix for the problem?

--Ari

On Mon, Jul 16, 2012 at 10:16 PM, Huang, Jie <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> Trying to upgrade Hadoop to 1.0.x, we found that the shuffleInput metric (for each reduce task) is not under the “mapred” context, according to the following implementation in ReduceTask.java. Currently, the ShuffleInput metric is under “default” context, since it is not set explicitly.
>
> Consequently, we cannot have “Hadoop_mapred_shuffleInput” directory under repos/*/ folder.
--
Ari Rabkin [EMAIL PROTECTED]
Princeton Computer Science Department