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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11983) HRegion constructors should not create HLog
Date Thu, 18 Dec 2014 21:32:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14252302#comment-14252302

Sean Busbey commented on HBASE-11983:

I have a larger refactoring that does the full create / open change. I still have something
like 6 test classes to finish refactoring. We could reduce the scope of this ticket for your
current fix and then file a follow on with the rest from my stuff?

> HRegion constructors should not create HLog 
> --------------------------------------------
>                 Key: HBASE-11983
>                 URL: https://issues.apache.org/jira/browse/HBASE-11983
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>            Reporter: Enis Soztutar
>            Assignee: Nick Dimiduk
>              Labels: beginner
>             Fix For: 2.0.0
>         Attachments: HBASE-11983.00.patch
> We should get rid of HRegion creating its own HLog. It should ALWAYS get the log from
> I think this was added for unit tests, but we should refrain from such practice in the
future (adding UT constructors always leads to weird and critical bugs down the road). See
recent: HBASE-11982, HBASE-11654. 
> Get rid of weird things like ignoreHLog:
> {code}
>   /**
>    * @param ignoreHLog - true to skip generate new hlog if it is null, mostly for createTable
>    */
>   public static HRegion createHRegion(final HRegionInfo info, final Path rootDir,
>                                       final Configuration conf,
>                                       final HTableDescriptor hTableDescriptor,
>                                       final HLog hlog,
>                                       final boolean initialize, final boolean ignoreHLog)
> {code}
> We can unify all the createXX and newXX methods and separate creating a region in the
file system vs opening a region. 

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