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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10000) Initiate lease recovery for outstanding WAL files at the very beginning of recovery
Date Tue, 10 Dec 2013 19:16:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13844561#comment-13844561

Ted Yu commented on HBASE-10000:

Did some cluster testing on a 5 region server cluster:

restarted all servers after updating hbase-protocol and hbase-server jars
used ycsb to load 50,000 rows into usertable
usertable was located on hor13n05
killed region server process on hor13n05
usertable got reassigned to hor13n04
counted rows in usertable: 50,000

No exceptions were found related to SplitLogManager / SplitLogWorker

> Initiate lease recovery for outstanding WAL files at the very beginning of recovery
> -----------------------------------------------------------------------------------
>                 Key: HBASE-10000
>                 URL: https://issues.apache.org/jira/browse/HBASE-10000
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 0.98.1
>         Attachments: 10000-0.96-v5.txt, 10000-0.96-v6.txt, 10000-recover-ts-with-pb-2.txt,
10000-recover-ts-with-pb-3.txt, 10000-recover-ts-with-pb-4.txt, 10000-recover-ts-with-pb-5.txt,
10000-recover-ts-with-pb-6.txt, 10000-v4.txt, 10000-v5.txt, 10000-v6.txt
> At the beginning of recovery, master can send lease recovery requests concurrently for
outstanding WAL files using a thread pool.
> Each split worker would first check whether the WAL file it processes is closed.
> Thanks to Nicolas Liochon and Jeffery discussion with whom gave rise to this idea. 

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