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From "ramkrishna.s.vasudevan (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5009) Failure of creating split dir if it already exists prevents splits from happening further
Date Wed, 21 Dec 2011 01:19:30 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13173730#comment-13173730

ramkrishna.s.vasudevan commented on HBASE-5009:

      boolean stillRunning = !threadPool.awaitTermination(
          this.fileSplitTimeout, TimeUnit.MILLISECONDS);
We already do that.  We wait for 30 secs.  But the problem is the threads that were spawned
are still alive and later they issue the create command to NN.  Thus after we rollback and
delete the splitdir it is again created by these threads.  
Correct me if am wrong Ted.
> Failure of creating split dir if it already exists prevents splits from happening further
> -----------------------------------------------------------------------------------------
>                 Key: HBASE-5009
>                 URL: https://issues.apache.org/jira/browse/HBASE-5009
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.90.6
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: HBASE-5009.patch, HBASE-5009_Branch90.patch
> The scenario is
> -> The split of a region takes a long time
> -> The deletion of the splitDir fails due to HDFS problems.
> -> Subsequent splits also fail after that.
> {code}
> private static void createSplitDir(final FileSystem fs, final Path splitdir)
>   throws IOException {
>     if (fs.exists(splitdir)) throw new IOException("Splitdir already exits? " + splitdir);
>     if (!fs.mkdirs(splitdir)) throw new IOException("Failed create of " + splitdir);
>   }
> {code}
> Correct me if am wrong? If it is an issue can we change the behaviour of throwing exception?
> Pls suggest.

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