hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hive QA (Jira)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-23349) ACID: Concurrent MERGE INSERT operations produce duplicates
Date Fri, 08 May 2020 15:15:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-23349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17102658#comment-17102658
] 

Hive QA commented on HIVE-23349:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/13002360/HIVE-23349.6.patch

{color:green}SUCCESS:{color} +1 due to 2 test(s) being added or modified.

{color:green}SUCCESS:{color} +1 due to 17246 tests passed

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/22205/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/22205/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-22205/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}

This message is automatically generated.

ATTACHMENT ID: 13002360 - PreCommit-HIVE-Build

> ACID: Concurrent MERGE INSERT operations produce duplicates
> -----------------------------------------------------------
>
>                 Key: HIVE-23349
>                 URL: https://issues.apache.org/jira/browse/HIVE-23349
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>            Reporter: Denys Kuzmenko
>            Assignee: Denys Kuzmenko
>            Priority: Major
>         Attachments: HIVE-23349.1.patch, HIVE-23349.2.patch, HIVE-23349.3.patch, HIVE-23349.4.patch,
HIVE-23349.5.patch, HIVE-23349.6.patch
>
>
> 2 concurrent MERGE INSERT operations generate duplicates due to lack of locking. 
> MERGE INSERT is treated as regular INSERT, it acquires SHARED_READ lock that doesn't
prevent other INSERTs. We should use EXCLUSIVE lock here or EXCL_WRITE if hive.txn.write.xlock=false;
> {code}
> create table target (a int, b int) stored as orc TBLPROPERTIES ('transactional'='true')");
> insert into target values (1,2), (3,4)
> create table source (a int, b int)
> {code}
> execute in parallel:
> {code}
> insert into source values (5,6), (7,8)
> {code}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

Mime
View raw message