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Posted to dev@orc.apache.org by 章逸群 <gu...@gmail.com> on 2021/08/24 16:26:03 UTC
Do we need to adjust the minimum Hadoop version
Hi All.
I am writing a test example of mapreduce using orc.
NullPointerException during runtime.
java.lang.Exception: java.lang.NullPointerException
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:403)
Caused by: java.lang.NullPointerException
at org.apache.orc.mapred.OrcKey.readFields(OrcKey.java:57)
at org.apache.hadoop.io.WritableComparator.compare(WritableComparator.java:129)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.compare(MapTask.java:1248)
at org.apache.hadoop.util.QuickSort.fix(QuickSort.java:35)
at org.apache.hadoop.util.QuickSort.sortInternal(QuickSort.java:87)
at org.apache.hadoop.util.QuickSort.sort(QuickSort.java:63)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1582)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1467)
at org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:699)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:769)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)
at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:235)
The variable key inside OrcKey is not init. Analysis revealed a bug in
hadoop-common that was fixed in version 2.5.0.
https://issues.apache.org/jira/browse/HADOOP-10686
https://github.com/apache/hadoop/commit/fc7c8f9bf2588fd25f8b457ee4a9b444e619519c
Do we need to change min.hadoop.version to the ORC-mapreduce module ?
Is there a remedy for this?
Best,
Yiqun Zhang
Re: Do we need to adjust the minimum Hadoop version
Posted by Dongjoon Hyun <do...@gmail.com>.
Thank you for sending out the email.
Moreover, the current min hadoop version (2.2.0) looks too old and
unreasonable to me.
<min.hadoop.version>2.2.0</min.hadoop.version>
For Apache ORC 1.7.0, I'm +1 to bump the minimum hadoop version to higher
versions.
Bests,
Dongjoon.
On Tue, Aug 24, 2021 at 1:43 PM 章逸群 <gu...@gmail.com> wrote:
> Hi All.
>
>
> I am writing a test example of mapreduce using orc.
>
> NullPointerException during runtime.
>
> java.lang.Exception: java.lang.NullPointerException
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:403)
> Caused by: java.lang.NullPointerException
> at org.apache.orc.mapred.OrcKey.readFields(OrcKey.java:57)
> at org.apache.hadoop.io
> .WritableComparator.compare(WritableComparator.java:129)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.compare(MapTask.java:1248)
> at org.apache.hadoop.util.QuickSort.fix(QuickSort.java:35)
> at org.apache.hadoop.util.QuickSort.sortInternal(QuickSort.java:87)
> at org.apache.hadoop.util.QuickSort.sort(QuickSort.java:63)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1582)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1467)
> at
> org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:699)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:769)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:235)
>
> The variable key inside OrcKey is not init. Analysis revealed a bug in
> hadoop-common that was fixed in version 2.5.0.
> https://issues.apache.org/jira/browse/HADOOP-10686
>
> https://github.com/apache/hadoop/commit/fc7c8f9bf2588fd25f8b457ee4a9b444e619519c
>
> Do we need to change min.hadoop.version to the ORC-mapreduce module ?
> Is there a remedy for this?
>
>
> Best,
>
> Yiqun Zhang
>