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Hadoop, mail # user - Avoiding Ganglia NPE on EC2


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Avoiding Ganglia NPE on EC2
Stuart Sierra 2009-03-05, 21:53
Hi all,

I'm getting this NPE on Hadoop 0.18.3, using the EC2 contrib scripts:

    Exception in thread "Timer thread for monitoring dfs"
java.lang.NullPointerException
    at org.apache.hadoop.metrics.ganglia.GangliaContext.xdr_string(GangliaContext.java:195)

This is reported as: https://issues.apache.org/jira/browse/HADOOP-4137

What's the easiest workaround?  Switch to another Hadoop version
(which one)?  Or disable Ganglia entirely (how)?

Thanks,
-Stuart
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Mark Kerzner 2009-03-05, 21:55