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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13196) UDFLike: reduce Regex NFA sizes
Date Thu, 03 Mar 2016 20:47:18 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15178592#comment-15178592
] 

Hive QA commented on HIVE-13196:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12790892/HIVE-13196.1.patch

{color:red}ERROR:{color} -1 due to no test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 9 failed/errored test(s), 9781 tests executed
*Failed tests:*
{noformat}
TestSparkCliDriver-groupby3_map.q-sample2.q-auto_join14.q-and-12-more - did not produce a
TEST-*.xml file
TestSparkCliDriver-groupby_map_ppr_multi_distinct.q-table_access_keys_stats.q-groupby4_noskew.q-and-12-more
- did not produce a TEST-*.xml file
TestSparkCliDriver-join_rc.q-insert1.q-vectorized_rcfile_columnar.q-and-12-more - did not
produce a TEST-*.xml file
TestSparkCliDriver-ppd_join4.q-join9.q-ppd_join3.q-and-12-more - did not produce a TEST-*.xml
file
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.org.apache.hadoop.hive.cli.TestMiniTezCliDriver
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver_cbo_semijoin
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver_update_where_partitioned
org.apache.hadoop.hive.cli.TestNegativeCliDriver.testNegativeCliDriver_authorization_uri_import
org.apache.hive.jdbc.TestSSL.testSSLVersion
{noformat}

Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/7155/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/7155/console
Test logs: http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-TRUNK-Build-7155/

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: 9 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12790892 - PreCommit-HIVE-TRUNK-Build

> UDFLike: reduce Regex NFA sizes
> -------------------------------
>
>                 Key: HIVE-13196
>                 URL: https://issues.apache.org/jira/browse/HIVE-13196
>             Project: Hive
>          Issue Type: Improvement
>          Components: UDF
>    Affects Versions: 1.3.0, 1.2.1, 2.0.0, 2.1.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Minor
>         Attachments: HIVE-13196.1.patch
>
>
> The NFAs built from complex regexes in UDFLike are extremely complex and spend a lot
of time doing simple expression matching with no backtracking.
> Prevent NFA -> DFA explosion by using reluctant regex matches instead of greedy matches.



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