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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5844) Delete the region servers znode after a regions server crash
Date Sat, 21 Apr 2012 07:16:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13258796#comment-13258796

stack commented on HBASE-5844:

If we go to a count > 100 we just continue the startup?  Is that what you want?

+    while (!tracker.checkIfBaseNodeAvailable() && ++count<100) {
+      Thread.sleep(100);
+    }

Be like the rest of the code regards spaces; i.e. spaces around operators...

+    if (fileName==null){

Maybe you don't need deleteMyEphemeralNodeOnDisk if you instead use http://docs.oracle.com/javase/6/docs/api/java/io/File.html#deleteOnExit()
inside in writeMyEphemeralNodeOnDisk?

Patch looks good N.

We upped the timeout because noobs would install hbase then run big mapreduce jobs w/o turning
jvm and so big GCs.  We figured they'd rather have their regionserver ride over the big pauses
than have them be 'sensitive' out of the box.
> Delete the region servers znode after a regions server crash
> ------------------------------------------------------------
>                 Key: HBASE-5844
>                 URL: https://issues.apache.org/jira/browse/HBASE-5844
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver, scripts
>    Affects Versions: 0.96.0
>            Reporter: nkeywal
>            Assignee: nkeywal
>         Attachments: 5844.v1.patch
> today, if the regions server crashes, its znode is not deleted in ZooKeeper. So the recovery
process will stop only after a timeout, usually 30s.
> By deleting the znode in start script, we remove this delay and the recovery starts immediately.

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