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From "Loknath Priyatham Teja Singamsetty (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-15924) Enhance hbase services autorestart capability to hbase-daemon.sh
Date Wed, 05 Oct 2016 09:28:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15548182#comment-15548182
] 

Loknath Priyatham Teja Singamsetty  edited comment on HBASE-15924 at 10/5/16 9:27 AM:
--------------------------------------------------------------------------------------

[~apurtell] [~larsh] [~anoop.hbase] Need help on pushing this patch. The ASF license errors
are misleading. Fixed the warnings and errors of shell check. However there are multiple notification
messages which are existing from way back. 

 


was (Author: singamteja):
[~apurtell] [~larsh] Need help on pushing this patch. The ASF license errors are misleading.
Fixed the warnings and errors of shell check. However there are multiple notification messages
which are existing from way back. 

> Enhance hbase services autorestart capability to hbase-daemon.sh 
> -----------------------------------------------------------------
>
>                 Key: HBASE-15924
>                 URL: https://issues.apache.org/jira/browse/HBASE-15924
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.98.19
>            Reporter: Loknath Priyatham Teja Singamsetty 
>            Assignee: Loknath Priyatham Teja Singamsetty 
>             Fix For: 0.98.24
>
>         Attachments: HBASE-15924.master.0001.patch, HBASE-15924.master.0002.patch, HBASE-15924.master.0003.patch
>
>
> As part of HBASE-5939, the autorestart for hbase services has been added to deal with
scenarios where hbase services (master/regionserver/master-backup) gets killed or goes down
leading to unplanned outages. The changes were made to hbase-daemon.sh to support autorestart
option. 
> However, the autorestart implementation doesn't work in standalone mode and other than
that have few gaps with the implementation as per release notes of HBASE-5939. Here is an
attempt to re-design and fix the functionality considering all possible usecases with hbase
service operations.
> Release Notes of HBASE-5939:
> ------------------------------------------
> When launched with autorestart, HBase processes will automatically restart if they are
not properly terminated, either by a "stop" command or by a cluster stop. To ensure that it
does not overload the system when the server itself is corrupted and the process cannot be
restarted, the server sleeps for 5 minutes before restarting if it was already started 5 minutes
ago previously. To use it, launch the process with "bin/start-hbase autorestart". This option
is not fully compatible with the existing "restart" command: if you ask for a restart on a
server launched with autorestart, the server will restart but the next server instance won't
be automatically restarted.



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