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From "Chia-Ping Tsai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17887) TestAcidGuarantees fails frequently
Date Fri, 12 May 2017 08:54:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16007818#comment-16007818
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Chia-Ping Tsai commented on HBASE-17887:
----------------------------------------

bq. We should have been getting not one scanner but N scanners from the memstore.
backport HBASE-17655 to branch-1?
bq. When the update scanner op happen with updating one new file, ONLY the corresponding snapshot
scanner should get removed.
The corresponding scanner may belong to active, snapshot, or pipeline (if the flush happen
many times before we call scanner#next), so we need to check the key range for all memstore
scanner to find out to which scanners the new files are related. The new scanners which come
from current memstore also have corresponding scanner which should get removed. I will try
this solution later....Will be back here.

> 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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