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https://issues.apache.org/jira/browse/HIVE-2417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13094287#comment-13094287
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He Yongqiang commented on HIVE-2417:
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Good catch, this is a regression introduced in HIVE-2396.
Can you make the testcase more easy to reproduce the problem? I mean if without
the change in this diff, should get an error or incorrect results when running
with that testcase.
1. remove this "+set
mapred.output.compression.codec=org.apache.hadoop.io.compress.BZip2Codec;",
2. tgt_rc_merge_test only contains one file, so the 'alter table
tgt_rc_merge_test concatenate;' will basically do nothing. Can you make sure
this table at least contains 2 files? You can upload 2 gzip compressed rcfile
if there is not.
> Merging of compressed rcfiles fails to write the valuebuffer part correctly
> ---------------------------------------------------------------------------
>
> Key: HIVE-2417
> URL: https://issues.apache.org/jira/browse/HIVE-2417
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Krishna Kumar
> Assignee: Krishna Kumar
> Attachments: HIVE-2417.v0.patch
>
>
> The blockmerge task does not create proper rc files when merging compressed
> rc files as the valuebuffer writing is incorrect.
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