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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12295) Prevent block eviction under us if reads are in progress from the BBs
Date Wed, 22 Jul 2015 04:56:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14636226#comment-14636226
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ramkrishna.s.vasudevan commented on HBASE-12295:
------------------------------------------------

The test TestIOFencing runs fine
{code}
 T E S T S
-------------------------------------------------------
Running org.apache.hadoop.hbase.TestIOFencing
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 186.111 sec - in org.apache.hadoop.hbase.TestIOFencing

Results :
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0
{code}
I tried on the latest code and it runs fine. Also the same patch when ran in QA bot it passed.
So i think it is flakey and nothing specific to this commit.

> Prevent block eviction under us if reads are in progress from the BBs
> ---------------------------------------------------------------------
>
>                 Key: HBASE-12295
>                 URL: https://issues.apache.org/jira/browse/HBASE-12295
>             Project: HBase
>          Issue Type: Sub-task
>          Components: regionserver, Scanners
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0
>
>         Attachments: HBASE-12295.pdf, HBASE-12295_1.patch, HBASE-12295_1.pdf, HBASE-12295_10.patch,
HBASE-12295_12.patch, HBASE-12295_14.patch, HBASE-12295_15.patch, HBASE-12295_16.patch, HBASE-12295_16.patch,
HBASE-12295_17.patch, HBASE-12295_18.patch, HBASE-12295_2.patch, HBASE-12295_21.patch, HBASE-12295_4.patch,
HBASE-12295_4.pdf, HBASE-12295_5.pdf, HBASE-12295_9.patch, HBASE-12295_final.patch, HBASE-12295_trunk.patch
>
>
> While we try to serve the reads from the BBs directly from the block cache, we need to
ensure that the blocks does not get evicted under us while reading.  This JIRA is to discuss
and implement a strategy for the same.



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