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https://issues.apache.org/jira/browse/HIVE-13361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15211092#comment-15211092
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Prasanth Jayachandran commented on HIVE-13361:
----------------------------------------------
If the approach looks good I will commit the orc binary file first so that it
will be available for precommit test run.
> Orc concatenation should enforce the compression buffer size
> ------------------------------------------------------------
>
> Key: HIVE-13361
> URL: https://issues.apache.org/jira/browse/HIVE-13361
> Project: Hive
> Issue Type: Bug
> Affects Versions: 1.3.0, 2.0.0, 2.1.0
> Reporter: Yi Zhang
> Assignee: Prasanth Jayachandran
> Priority: Critical
> Attachments: HIVE-13361.1.patch, alltypesorc3xcols
>
>
> With HIVE-11807 buffer size estimation happens by default. This can have
> undesired effect wrt file concatenation. Consider the following table with
> files
> {code}
> testtable
> -- 000000_0 (created before HIVE-11807 which has buffer size 256KB)
> -- 000001_0 (created before HIVE-11807 which has buffer size 256KB)
> -- 000002_0 (created after HIVE-11807 with buffer size chosen as 128KB)
> -- 000003_0 (created after HIVE-11807 with buffer size chosen as 128KB)
> {code}
> If we perform ALTER TABLE .. CONCATENATE on the above table with HIVE-11807,
> then depending on the split arrangement 000000_0 and 000001_0 will be
> concatenated together to new merged file. But this new merged file will have
> 128KB buffer size (estimated buffer size and not requested buffer size).
> Since new ORC writer size does not honor the requested buffer size the new
> merged files will have smaller buffers than the required 256KB making the
> file unreadable. Following exception will be thrown when reading the table
> after concatenation
> {code}
> 2016-03-24T16:26:33,974 ERROR [a9e27a9a-37cb-411d-9708-6c58a4ce34f2 main]:
> CliDriver (SessionState.java:printError(1049)) - Failed with exception
> java.io.IOException:java.lang.IllegalArgumentException: Buffer size too
> small. size = 131072 needed = 153187
> java.io.IOException: java.lang.IllegalArgumentException: Buffer size too
> small. size = 131072 needed = 153187
> at
> org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:513)
> at
> org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:420)
> at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:145)
> at org.apache.hadoop.hive.ql.Driver.getResults(Driver.java:1848)
> at
> org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:256)
> at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:187)
> at
> org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:403)
> at
> org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:782)
> at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:721)
> at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:648)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
> at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
> {code}
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