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https://issues.apache.org/jira/browse/HADOOP-13545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15958125#comment-15958125
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Giovanni Matteo Fumarola commented on HADOOP-13545:
---------------------------------------------------

Just posted a rebase patch.

Few comments about [[email protected]]'s comments:
1. HSQLDB is used in couple of classes: DBCountPageView, 
DataDrivenDBRecordReader, DBRecordReader. I did run all the tests that involve 
these classes and all of them pass successfully.
[~ajisakaa], [~ozawa] Can you please take a look since from git looks like you 
guys who most recently looked at the DBTests.
2. This Jira is targeting hadoop 2.9.
3. YARN-3663 under YARN-2915 umbrella for Junit tests I need the new version of 
HSQLDB.



> Upgrade HSQLDB to 2.3.4
> -----------------------
>
>                 Key: HADOOP-13545
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13545
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 2.9.0
>            Reporter: Giovanni Matteo Fumarola
>            Priority: Minor
>             Fix For: 2.9.0
>
>         Attachments: HADOOP-13545.v1.patch, HADOOP-13545.v2.patch
>
>
> Upgrade HSQLDB from 2.0.0 to 2.3.4.
> Version 2.3.4 is fully multithreaded and supports high performance 2PL and 
> MVCC (multiversion concurrency control) transaction control models.



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