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https://issues.apache.org/jira/browse/HBASE-14557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14945321#comment-14945321
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Jerry He commented on HBASE-14557:
----------------------------------
Yes. [~ram_krish]
The Cells in the WALEdit can be KeyValue or NoTagsKeyValue depending on whether
they have tag when written by the server. Right?
Then we will have problem setting the OutputValueClass to either of the two
classes.
> MapReduce WALPlayer issue with NoTagsKeyValue
> ---------------------------------------------
>
> Key: HBASE-14557
> URL: https://issues.apache.org/jira/browse/HBASE-14557
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Jerry He
>
> Running MapReduce WALPlayer to convert WAL info HFiles:
> {noformat}
> 15/10/05 20:28:08 INFO mapred.JobClient: Task Id :
> attempt_201508031611_0029_m_000000_0, Status : FAILED
> java.io.IOException: Type mismatch in value from map: expected
> org.apache.hadoop.hbase.KeyValue, recieved
> org.apache.hadoop.hbase.NoTagsKeyValue
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:997)
> at
> org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:689)
> at
> org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)
> at
> org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)
> at
> org.apache.hadoop.hbase.mapreduce.WALPlayer$WALKeyValueMapper.map(WALPlayer.java:111)
> at
> org.apache.hadoop.hbase.mapreduce.WALPlayer$WALKeyValueMapper.map(WALPlayer.java:96)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:140)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:751)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:368)
> at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
> at
> java.security.AccessController.doPrivileged(AccessController.java:369)
> at javax.security.auth.Subject.doAs(Subject.java:572)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1502)
> at org.apache.hadoop.mapred.Child.main(Child.java:249)
> {noformat}
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