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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17887) TestAcidGuarantees fails frequently
Date Fri, 12 May 2017 07:28:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16007736#comment-16007736
] 

Anoop Sam John commented on HBASE-17887:
----------------------------------------

IMO the best fix for this is this way.  We should have been getting not one scanner but N
scanners from the memstore. Yes the API says that way but impl makes one Scanner consisting
of snapshot scaner and active segment scanner.  When the update scanner op happen with updating
one new file, ONLY the corresponding snapshot scanner should get removed. Pls think over.


Pls update the Jira title and desc.

> TestAcidGuarantees fails frequently
> -----------------------------------
>
>                 Key: HBASE-17887
>                 URL: https://issues.apache.org/jira/browse/HBASE-17887
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 2.0.0
>            Reporter: Umesh Agashe
>            Assignee: Chia-Ping Tsai
>            Priority: Blocker
>             Fix For: 2.0.0, 1.4.0, 1.2.6, 1.3.2, 1.4.1
>
>         Attachments: HBASE-17887.branch-1.v0.patch, HBASE-17887.branch-1.v1.patch, HBASE-17887.branch-1.v1.patch,
HBASE-17887.branch-1.v2.patch, HBASE-17887.branch-1.v2.patch, HBASE-17887.branch-1.v3.patch,
HBASE-17887.branch-1.v4.patch, HBASE-17887.branch-1.v4.patch, HBASE-17887.branch-1.v4.patch,
HBASE-17887.branch-1.v5.patch, HBASE-17887.branch-1.v6.patch, HBASE-17887.ut.patch, HBASE-17887.v0.patch,
HBASE-17887.v1.patch, HBASE-17887.v2.patch, HBASE-17887.v3.patch, HBASE-17887.v4.patch, HBASE-17887.v5.patch,
HBASE-17887.v5.patch
>
>
> As per the flaky tests dashboard here: https://builds.apache.org/job/HBASE-Find-Flaky-Tests/lastSuccessfulBuild/artifact/dashboard.html,
It fails 30% of the time.
> While working on HBASE-17863, a few verification builds on patch failed due to TestAcidGuarantees
didn't pass. IMHO, the changes for HBASE-17863 are unlikely to affect get/ put path.
> I ran the test with and without the patch several times locally and found that TestAcidGuarantees
fails without the patch similar number of times.
> Opening blocker, considering acid guarantees are critical to HBase.



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