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From Stack <st...@duboce.net>
Subject Re: bug in backport? How to work around?
Date Wed, 02 Mar 2011 04:44:36 GMT
Did you try comparing 0.90.20100924 to 0.90.1 to see if changes? Does
your hbase have 'HBASE-3392  Update backport of InputSampler to
reflect MAPREDUCE-1820'?  If not, want to apply it -- or just fast
forward your install to 0.90.1?

St.Ack

On Tue, Mar 1, 2011 at 8:38 PM, Geoff Hendrey <ghendrey@decarta.com> wrote:
> I am using HBase 0.89.20100924. I get a NullPointerException from
> org.apache.hadoop.hbase.mapreduce.hadoopbackport.InputSampler:
>
>
>
>     [exec] Exception in thread "main" java.lang.NullPointerException
>
>    [exec]     at
> org.apache.hadoop.mapreduce.lib.input.SequenceFileRecordReader.nextKeyVa
> lue(SequenceFileRecordReader.java:67)
>
>     [exec]     at
> org.apache.hadoop.hbase.mapreduce.hadoopbackport.InputSampler$RandomSamp
> ler.getSample(InputSampler.java:219)
>
>     [exec]     at
> org.apache.hadoop.hbase.mapreduce.hadoopbackport.InputSampler.writeParti
> tionFile(InputSampler.java:314)
>
>
>
> I saw a post claiming that this is because of a bug in InputSampler in
> which initialize has not been called on the SequenceFileRecordReader.
> This seems plausible, from looking at the source in
> hbase-0.89.20100924-src.tar.gz. Any advice would be appreciated since
> this is blocking me from using the TotalOrderingPartitioner.
>
>
>
> -geoff
>
>
>
>
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>
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>

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