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Posted to common-dev@hadoop.apache.org by "Chris Douglas (JIRA)" <ji...@apache.org> on 2008/11/14 00:44:44 UTC
[jira] Updated: (HADOOP-4137) NPE in GangliaContext.xdr_string
(GangliaContext.java:195)
[ https://issues.apache.org/jira/browse/HADOOP-4137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Douglas updated HADOOP-4137:
----------------------------------
Status: Open (was: Patch Available)
> NPE in GangliaContext.xdr_string (GangliaContext.java:195)
> ----------------------------------------------------------
>
> Key: HADOOP-4137
> URL: https://issues.apache.org/jira/browse/HADOOP-4137
> Project: Hadoop Core
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.18.1, 0.18.0
> Reporter: Michael Bieniosek
> Attachments: hadoop_ganglia_npe-4137.patch, hadoop_ganglia_npe-4137.patch
>
>
> 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.
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