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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3291) If split happens while regionserver is going down, we can stick open.
Date Wed, 01 Dec 2010 23:40:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965928#action_12965928
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Jean-Daniel Cryans commented on HBASE-3291:
-------------------------------------------

Another issue, when restarting after the fixup happened the parent region is offline and the
daughters are never registered leaving a hole in .META. which requires this patch:

{code}

--- a/src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
+++ b/src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
@@ -292,6 +292,7 @@ class SplitTransaction {
       final RegionServerServices services, final HRegion daughter)
   throws IOException, KeeperException {
     if (server.isStopped() || services.isStopping()) {
+      MetaEditor.addDaughter(server.getCatalogTracker(), daughter.getRegionInfo(), null);
       LOG.info("Not opening daughter " +
         daughter.getRegionInfo().getRegionNameAsString() +
         " because stopping=" + services.isStopping() + ", stopped=" +

{code}

> If split happens while regionserver is going down, we can stick open.
> ---------------------------------------------------------------------
>
>                 Key: HBASE-3291
>                 URL: https://issues.apache.org/jira/browse/HBASE-3291
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>             Fix For: 0.90.0
>
>         Attachments: closing.txt
>
>
> J-D found this one testing.  He found that if a split comes in during shutdown of a regionserver,
then the regionserver can stick open... and won't go down.
> We fixed a similar problem in the past where if balancer cut in during shutdown and assigned
a regionserver an region during shutdown, we'd open it and it'd cause us again to stick open.
 We fixed that by introducing the 'closing' state.
> Fix for the issue j-d found is to do closing check when onlining daughters.

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