Iam getting this error
A = load '/a/part-m-0000' using
org.apache.pig.piggybank.storage.SequenceFileLoader();
org.apache.pig.backend.BackendException: ERROR 0: Unable to translate class
org.apache.hadoop.io.NullWritable to a Pig datatype
at
org.apache.pig.piggybank.storage.SequenceFileLoader.setKeyType(SequenceFileLoader.java:81)
at
org.apache.pig.piggybank.storage.SequenceFileLoader.getNext(SequenceFileLoader.java:138)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigRecordReader.nextKeyValue(PigRecordReader.java:211)
at
org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:484)
at
org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:76)
at
org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:85)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:139)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:673)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:331)
at org.apache.hadoop.mapred.Child$4.run(Child.java:268)
at java.security.AccessController.doPrivileged(Native Method)
On Tue, May 20, 2014 at 5:41 AM, Pradeep Gollakota <pradeep...@gmail.com>wrote:
> You can use the SequenceFileLoader from the piggybank.
>
>
> http://pig.apache.org/docs/r0.12.0/api/org/apache/pig/piggybank/storage/SequenceFileLoader.html
>
>
> On Tue, May 20, 2014 at 2:46 AM, abhishek dodda
> <abhishek.dod...@gmail.com>wrote:
>
> > Hi All,
> >
> > I have trouble building code for this project.
> >
> > https://github.com/kevinweil/elephant-bird
> >
> > can some one tell how to read sequence files in pig.
> >
> > --
> > Thanks,
> > Abhishek
> >
>
--
Thanks,
Abhishek
2018509769
