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https://issues.apache.org/jira/browse/HBASE-25839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17338869#comment-17338869
 ] 

ZFabrik commented on HBASE-25839:
---------------------------------

I'm still debugging the problem because now I run into another problem later on 
during the sorting phase:

{code:java}
Error: java.lang.IllegalArgumentException: Invalid key length in KeyValue. 
keyLength=0, KeyValueBytesHex=\x00\x00\x00\x00\x00Lc30f5d93[...], offset=0, 
length=97
        at 
org.apache.hadoop.hbase.KeyValueUtil.checkKeyValueBytes(KeyValueUtil.java:541)
        at org.apache.hadoop.hbase.KeyValue.<init>(KeyValue.java:344)
        at org.apache.hadoop.hbase.KeyValue.create(KeyValue.java:2268)
        at org.apache.hadoop.hbase.KeyValue.create(KeyValue.java:2247)
        at 
org.apache.hadoop.hbase.mapreduce.Import$CellWritableComparable.readFields(Import.java:217)
        at 
org.apache.hadoop.hbase.mapreduce.Import$CellWritableComparable$CellWritableComparator.compare(Import.java:233)
        at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.compare(MapTask.java:1269)
        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$MapOutputBuffer.sortAndSpill(MapTask.java:1602)
        at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1491)
        at 
org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:723)
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:793)
        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)
{code}

However it seems that my suggested fix is kind of working ;-)




> 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
>          Components: mapreduce
>    Affects Versions: 2.2.5
>            Reporter: ZFabrik
>            Priority: Major
>
> 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 
> 423|https://github.com/apache/hbase/blob/f76a601273e834267b55c0cda12474590283fd4c/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/Import.java#L423]
>  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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