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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1372) TestGetRowVersions doesn't pass on 0.19 branch
Date Tue, 05 May 2009 19:50:30 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12706173#action_12706173

Jean-Daniel Cryans commented on HBASE-1372:

Digging in the code I saw that the region server was waiting after the master when reporting.
What happened is that when the master assigns a region, it writes an entry in the region historian.
Problem is, the first time HCM (under the historian) sees a table there is a huge wait....
which was too long for the 6 seconds lease in the tests. I think for 0.19.2 we should just
move that waiting time right up when the master starts with something like this in ProcessRegionOpen:

          server.batchUpdate(metaRegionName, b, -1L);
          if (!this.historian.isOnline()) {
            // This is safest place to do the onlining of the historian in
            // the master. When we get to here, we know there is a .META.
            // for the historian to go against.
          this.historian.addRegionOpen(regionInfo, serverAddress);
          this.historian.getRegionHistory("dummy"); <<<<

For trunk we could work on improving HCM.

> TestGetRowVersions doesn't pass on 0.19 branch
> ----------------------------------------------
>                 Key: HBASE-1372
>                 URL: https://issues.apache.org/jira/browse/HBASE-1372
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.19.2
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>            Priority: Blocker
>             Fix For: 0.19.2
> Currently TestGetRowVersions doesn't pass because the region server is too slow to setup
root and meta and gets a lease expired.

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