Hello hbase users,
I have a requirement to migrate data between CDH4 and CDH5. To migrate data
from CDH4 to CDH5, I am using export -> distcp -> import hbase tools and its
very well. But the same doesn't work from CDH5 to CDH4. In mapreduce task logs,
I see below exception.
java.lang.NegativeArraySizeException
at org.apache.hadoop.hbase.client.Result.readFields(Result.java:464)
at
org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:73)
at
org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:44)
at
org.apache.hadoop.io.SequenceFile$Reader.deserializeValue(SequenceFile.java:2180)
at
org.apache.hadoop.io.SequenceFile$Reader.getCurrentValue(SequenceFile.java:2153)
at
org.apache.hadoop.mapreduce.lib.input.SequenceFileRecordReader.nextKeyValue(SequenceFileRecordReader.java:74)
at
org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:458)
at
org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:76)
at
org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:85)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:139)
at org.apache.hadoop.mapred.MapTask.runNewMapper
Has any one tried copying data from CDH5 (0.98) to CDH (0.92) ?? Any advice is
appreciated. Thanks.
- arun
