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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-15924) Enhance hbase services autorestart capability to hbase-daemon.sh
Date Wed, 21 Dec 2016 01:39:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-15924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-15924:
-----------------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s:     (was: 0.98.24)
                   1.4.0
                   2.0.0
           Status: Resolved  (was: Patch Available)

> 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: 2.0.0, 1.4.0
>
>         Attachments: HBASE-15924.master.0001.patch, HBASE-15924.master.0002.patch, HBASE-15924.master.0003.patch,
HBASE-15924.master.0004.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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