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Chukwa >> mail # dev >> ShuffleInput is not under the "mapred" context since Hadoop 1.0 metrics2


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ShuffleInput is not under the "mapred" context since Hadoop 1.0 metrics2
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)
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