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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3521) Hadoop mapreduce task metrics, unable to send metrics data.
Date Tue, 10 Jun 2008 01:25:44 GMT
Hadoop mapreduce task metrics, unable to send metrics data.

                 Key: HADOOP-3521
                 URL: https://issues.apache.org/jira/browse/HADOOP-3521
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred
    Affects Versions: 0.18.0
            Reporter: Eric Yang

Found the following new metrics in tasktracker:

mapTaskSlots (short)
reduceTaskSlots (short)
tasks_failed_timeout (int)
tasks_failed_ping (int)

After configuring Simon to match the new metrics, this error was thrown in the task tracker

Exception in thread "Timer thread for monitoring mapred" java.lang.ClassCastException: java.lang.Long
        at com.yahoo.simon.hadoop.metrics.Client.sendBlurb(Client.java:266)
        at com.yahoo.simon.hadoop.metrics.SimonContext.emitRecord(SimonContext.java:160)
        at org.apache.hadoop.metrics.spi.AbstractMetricsContext.emitRecords(AbstractMetricsContext.java:304)
        at org.apache.hadoop.metrics.spi.AbstractMetricsContext.timerEvent(AbstractMetricsContext.java:290)
        at org.apache.hadoop.metrics.spi.AbstractMetricsContext.access$000(AbstractMetricsContext.java:50)
        at org.apache.hadoop.metrics.spi.AbstractMetricsContext$1.run(AbstractMetricsContext.java:249)
        at java.util.TimerThread.mainLoop(Timer.java:512)
        at java.util.TimerThread.run(Timer.java:462)

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