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https://issues.apache.org/jira/browse/HBASE-14557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14946352#comment-14946352
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ramkrishna.s.vasudevan commented on HBASE-14557:
------------------------------------------------
bq.So, we back out the above?
NoTagsKeyValue can be used in the HFileReader path but in the WAL side may be
we not use it.
bq.To every KV? Lets not if we can avoid it.
Then on the WAL side we should allow the tag parsing to happening per KV.
> 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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