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https://issues.apache.org/jira/browse/HIVE-15114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15674829#comment-15674829
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Hive QA commented on HIVE-15114:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12839426/HIVE-15114.3.patch
{color:green}SUCCESS:{color} +1 due to 2 test(s) being added or modified.
{color:red}ERROR:{color} -1 due to 6 failed/errored test(s), 10670 tests
executed
*Failed tests:*
{noformat}
TestSparkCliDriver - did not produce a TEST-*.xml file (likely timed out)
(batchId=105)
[auto_join30.q,timestamp_null.q,date_udf.q,join16.q,groupby_ppr.q,bucketmapjoin7.q,smb_mapjoin_18.q,join19.q,vector_varchar_4.q,union6.q,cbo_subq_in.q,vectorization_part.q,sample8.q,vectorized_timestamp_funcs.q,join_star.q]
TestSparkCliDriver - did not produce a TEST-*.xml file (likely timed out)
(batchId=115)
[timestamp_lazy.q,union29.q,runtime_skewjoin_mapjoin_spark.q,auto_join22.q,union8.q,groupby5_map.q,stats0.q,auto_join29.q,groupby6.q,merge1.q,mapjoin_distinct.q,vector_decimal_mapjoin.q,sample5.q,multi_insert_move_tasks_share_dependencies.q,join_array.q]
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[orc_ppd_schema_evol_3a]
(batchId=133)
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[transform_ppr2]
(batchId=133)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[join_acid_non_acid]
(batchId=150)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[union_fast_stats]
(batchId=145)
{noformat}
Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/2172/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/2172/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-2172/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
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: 6 tests failed
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12839426 - PreCommit-HIVE-Build
> Remove extra MoveTask operators
> -------------------------------
>
> Key: HIVE-15114
> URL: https://issues.apache.org/jira/browse/HIVE-15114
> Project: Hive
> Issue Type: Sub-task
> Components: Hive
> Affects Versions: 2.1.0
> Reporter: Sahil Takiar
> Assignee: Sergio Peña
> Attachments: HIVE-15114.3.patch, HIVE-15114.WIP.1.patch,
> HIVE-15114.WIP.2.patch
>
>
> When running simple insert queries (e.g. {{INSERT INTO TABLE ... VALUES
> ...}}) there an extraneous {{MoveTask}s is created.
> This is problematic when the scratch directory is on S3 since renames require
> copying the entire dataset.
> For simple queries (like the one above), there are two MoveTasks. The first
> one moves the output data from one file in the scratch directory to another
> file in the scratch directory. The second MoveTask moves the data from the
> scratch directory to its final table location.
> The first MoveTask should not be necessary. The goal of this JIRA it to
> remove it. This should help improve performance when running on S3.
> It seems that the first Move might be caused by a dependency resolution
> problem in the optimizer, where a dependent task doesn't get properly removed
> when the task it depends on is filtered by a condition resolver.
> A dummy {{MoveTask}} is added in the
> {{GenMapRedUtils.createMRWorkForMergingFiles}} method. This method creates a
> conditional task which launches a job to merge tasks at the end of the file.
> At the end of the conditional job there is a MoveTask.
> Even though Hive decides that the conditional merge job is no needed, it
> seems the MoveTask is still added to the plan.
> Seems this extra {{MoveTask}} may have been added intentionally. Not sure why
> yet. The {{ConditionalResolverMergeFiles}} says that one of three tasks will
> be returned: move task only, merge task only, merge task followed by a move
> task.
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