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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14643) Avoid Splits from once again opening a closed reader for fetching the first and last key
Date Wed, 21 Oct 2015 09:56:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14966571#comment-14966571
] 

Hudson commented on HBASE-14643:
--------------------------------

FAILURE: Integrated in HBase-1.0 #1093 (See [https://builds.apache.org/job/HBase-1.0/1093/])
HBASE-14643 Avoid Splits from once again opening a closed reader for (ramkrishna: rev d1e67280770b3061f1bf9890e5cdb9a57a91e17b)
* hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java


> Avoid Splits from once again opening a closed reader for fetching the first and last
key
> ----------------------------------------------------------------------------------------
>
>                 Key: HBASE-14643
>                 URL: https://issues.apache.org/jira/browse/HBASE-14643
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: Heng Chen
>             Fix For: 2.0.0, 1.2.0, 1.3.0, 1.0.3, 1.1.3
>
>         Attachments: HBASE-14643-branch-1.2.patch, HBASE-14643-branch-1.patch, HBASE-14643.patch,
HBASE-14643_v1.patch, HBASE-14643_v2.patch, HBASE-14643_v3.patch, HBASE-14643_v4.patch, HBASE-14643_v5.patch
>
>
> Currently split flow is such that we close the parent region and all its store file readers
are also closed.  After that inorder to split the reference files we need the first and last
keys for which once again open the readers on those store files.  This could be costlier operation
considering the fact that it has to contact the HDFS for this close and open operation. This
JIRA is to see if we can improve this.



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