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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-6797) Add protection against divide by zero in stats annotation
Date Tue, 01 Apr 2014 18:19:23 GMT

    [ https://issues.apache.org/jira/browse/HIVE-6797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13956846#comment-13956846
] 

Hive QA commented on HIVE-6797:
-------------------------------



{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/12638001/HIVE-6797.2.patch

{color:red}ERROR:{color} -1 due to 2 failed/errored test(s), 5513 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestNegativeMinimrCliDriver.testNegativeCliDriver_mapreduce_stack_trace_hadoop20
org.apache.hcatalog.pig.TestHCatStorerMulti.testStoreBasicTable
{noformat}

Test results: http://bigtop01.cloudera.org:8080/job/PreCommit-HIVE-Build/2068/testReport
Console output: http://bigtop01.cloudera.org:8080/job/PreCommit-HIVE-Build/2068/console

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: 2 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12638001

> Add protection against divide by zero in stats annotation
> ---------------------------------------------------------
>
>                 Key: HIVE-6797
>                 URL: https://issues.apache.org/jira/browse/HIVE-6797
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor, Statistics
>    Affects Versions: 0.13.0
>            Reporter: Prasanth J
>            Assignee: Prasanth J
>             Fix For: 0.13.0
>
>         Attachments: HIVE-6797.1.patch, HIVE-6797.2.patch
>
>
> In stats annotation, the denominator computation in join operator is not protected for
divide by zero exception. It will be an issue when NDV (count distinct) updated by updateStats()
becomes 0. This patch adds protection in updateStats() method to prevent divide-by-zero in
downstream operators.



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