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From Ted Yu <yuzhih...@gmail.com>
Subject Re: mapreduce get error while update HBase
Date Fri, 21 Oct 2016 18:21:31 GMT
Can you give us more information so that we can match the line numbers in
the stack trace with actual code ?

release of hbase
hadoop version

If you can show snippet of related code, that would be nice.

Thanks

On Fri, Oct 21, 2016 at 11:16 AM, 乔彦克 <qyanke@gmail.com> wrote:

> Hi, all
>
>     I use mapreduce to update HBase data, got this error just now, and
> I have no idea why this happened.
>
> below is the error log:
>
>         2016-10-22 01:14:49,047 WARN [main]
> org.apache.hadoop.mapred.YarnChild: Exception running child :
> java.lang.RuntimeException: java.lang.NullPointerException
>         at org.apache.hadoop.hbase.client.RpcRetryingCaller.
> callWithoutRetries(RpcRetryingCaller.java:208)
>         at org.apache.hadoop.hbase.client.ClientScanner.call(
> ClientScanner.java:314)
>         at org.apache.hadoop.hbase.client.ClientScanner.
> loadCache(ClientScanner.java:397)
>         at org.apache.hadoop.hbase.client.ClientScanner.next(
> ClientScanner.java:358)
>         at org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl.
> nextKeyValue(TableRecordReaderImpl.java:220)
>         at org.apache.hadoop.hbase.mapreduce.TableRecordReader.
> nextKeyValue(TableRecordReader.java:151)
>         at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.
> nextKeyValue(MapTask.java:556)
>         at org.apache.hadoop.mapreduce.task.MapContextImpl.
> nextKeyValue(MapContextImpl.java:80)
>         at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.
> nextKeyValue(WrappedMapper.java:91)
>         at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
>         at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
>         at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
>         at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:415)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(
> UserGroupInformation.java:1671)
>         at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> Caused by: java.lang.NullPointerException
>         at org.apache.hadoop.hbase.client.RpcRetryingCaller.
> callWithoutRetries(RpcRetryingCaller.java:199)
>         ... 16 more
>
> Any reply is appreciated.
>
>
> Best regards
>
> Qiao Yanke
>

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