[HADOOP-3521] Hadoop mapreduce task metrics, unable to send metrics data.

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.18.0
• Fix Version/s: 0.18.0
• Assignee: Arun Murthy
• Reporter: Eric Yang
• Created: 10/Jun/08 01:23
• Updated: 08/Jul/09 16:52
• Resolved: 24/Jul/08 22:20

Description

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 log:

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)