ZFabrik created HBASE-25839:
-------------------------------
Summary: Bulk Import fails with java.io.IOException: Type mismatch
in value from map
Key: HBASE-25839
URL: https://issues.apache.org/jira/browse/HBASE-25839
Project: HBase
Issue Type: Bug
Affects Versions: 2.2.5
Reporter: ZFabrik
Bulk Import with {{-Dimport.bulk.output=/HFILES
-Dimport.bulk.hasLargeResult=true}} always results in
{noformat}
Error: java.io.IOException: Type mismatch in value from map: expected
org.apache.hadoop.hbase.util.MapReduceExtendedCell, received
org.apache.hadoop.hbase.IndividualBytesFieldCell
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1077)
at
org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:715)
at
org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)
at
org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)
at
org.apache.hadoop.hbase.mapreduce.Import$CellSortImporter.map(Import.java:423)
at
org.apache.hadoop.hbase.mapreduce.Import$CellSortImporter.map(Import.java:394)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
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:175)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1844)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:169)
{noformat}
The Problem is that in
{{org.apache.hadoop.hbase.mapreduce.Import.CellSortImporter#map}} the {{Cell}}
coming from {{value.rawCells()}} (which is of type
{{org.apache.hadoop.hbase.IndividualBytesFieldCell}}) is directly written to
the context without wrapping it into {{MapReduceExtendedCell}} (like it happens
at {{CellImporter#map}}.
IMHO
[line|https://github.com/apache/hbase/blob/f76a601273e834267b55c0cda12474590283fd4c/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/Import.java#L315]
must look like this:
{code:java}
context.write(new CellWritableComparable(ret), new
MapReduceExtendedCell(ret));
{code}
Furthermore it seems to me that this is also wrong in all subsequent versions
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