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https://issues.apache.org/jira/browse/HIVE-4927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13720295#comment-13720295
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Hive QA commented on HIVE-4927:
-------------------------------
{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/12594200/HIVE-4927.D11811.3.patch
{color:red}ERROR:{color} -1 due to 2 failed/errored test(s), 2651 tests executed
*Failed tests:*
{noformat}
org.apache.hcatalog.pig.TestHCatLoader.testProjectionsBasic
org.apache.hadoop.hive.cli.TestMinimrCliDriver.testCliDriver_bucketmapjoin6
{noformat}
Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/187/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/187/console
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.CleanupPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests failed with: TestsFailedException: 2 tests failed
{noformat}
This message is automatically generated.
> When we merge two MapJoin MapRedTasks, the TableScanOperator of the second
> one should be removed
> ------------------------------------------------------------------------------------------------
>
> Key: HIVE-4927
> URL: https://issues.apache.org/jira/browse/HIVE-4927
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.12.0
> Reporter: Yin Huai
> Assignee: Yin Huai
> Attachments: HIVE-4927.D11811.1.patch, HIVE-4927.D11811.2.patch,
> HIVE-4927.D11811.3.patch
>
>
> {code}
> set hive.auto.convert.join=true;
> set hive.auto.convert.join.noconditionaltask=true;
> EXPLAIN
> SELECT x1.key AS key FROM src x1 JOIN src1 y1 ON (x1.key = y1.key) JOIN src1
> y2 ON (x1.value = y2.value) GROUP BY x1.key;
> {\code}
> We will get a NPE from MetadataOnlyOptimizer. The reason is that the operator
> tree of the MapRedTask evaluating two MapJoins is
> {code}
> TS1->MapJoin1->TS2->MapJoin2->...
> {\code}
> We should remove the TS2...
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