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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8347) Use base-64 encoding instead of custom encoding for serialized objects
Date Sat, 04 Oct 2014 22:36:33 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14159314#comment-14159314
] 

Hive QA commented on HIVE-8347:
-------------------------------



{color:red}Overall{color}: -1 at least one tests failed

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12672889/HIVE-8347.patch

{color:red}ERROR:{color} -1 due to 1 failed/errored test(s), 6524 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.ql.txn.compactor.TestCompactor.testStatsAfterCompactionPartTbl
{noformat}

Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/1117/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/1117/console
Test logs: http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-TRUNK-Build-1117/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 1 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12672889

> Use base-64 encoding instead of custom encoding for serialized objects
> ----------------------------------------------------------------------
>
>                 Key: HIVE-8347
>                 URL: https://issues.apache.org/jira/browse/HIVE-8347
>             Project: Hive
>          Issue Type: Improvement
>          Components: HCatalog
>    Affects Versions: 0.13.1
>            Reporter: Mariappan Asokan
>         Attachments: HIVE-8347.patch
>
>
> Serialized objects that are shipped via Hadoop {{Configuration}} are encoded using custom
encoding (see {{HCatUtil.encodeBytes()}} and its complement {{HCatUtil.decodeBytes()}}) which
has 100% overhead.  In other words, each byte in the serialized object becomes 2 bytes after
encoding.  Perhaps, this might be one of the reasons for the problem reported in HCATALOG-453.
 The patch for HCATALOG-453 compressed serialized {{InputJobInfo}} objects to solve the problem.
> By using Base64 encoding, the overhead will be reduced to about 33%.  This will alleviate
the problem for all serialized objects.



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