Details
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Bug
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Status: Closed
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Major
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Resolution: Duplicate
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0.18.0, 0.18.1
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None
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None
Description
Exception in thread "Timer thread for monitoring dfs" java.lang.NullPointerException
at org.apache.hadoop.metrics.ganglia.GangliaContext.xdr_string(GangliaContext.java:195)
at org.apache.hadoop.metrics.ganglia.GangliaContext.emitMetric(GangliaContext.java:138)
at org.apache.hadoop.metrics.ganglia.GangliaContext.emitRecord(GangliaContext.java:123)
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(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
It looks like this caused the datanode to hang, though I accidentally killed the datanode before I could dump its stack.
Attachments
Attachments
Issue Links
- duplicates
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HADOOP-3422 Ganglia counter metrics are all reported with the metric name "value", so the counter values can not be seen
- Closed
- relates to
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HADOOP-3422 Ganglia counter metrics are all reported with the metric name "value", so the counter values can not be seen
- Closed