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

Loknath Priyatham Teja Singamsetty  updated HBASE-15924:
--------------------------------------------------------
    Release Note: 
Now one can start hbase services with enabled "autostart/autorestart" feature 
in controlled fashion with the help of "--autostart-window-size" to define the 
window period and the "--autostart-window-retry-limit" to define the number of 
times the hbase services have to be restarted upon being killed/terminated 
abnormally within the provided window perioid.

The following cases are supported with "autostart/autorestart":

a) --autostart-window-size=0 and --autostart-window-retry-limit=0, indicates 
infinite window size and no retry limit
b) not providing the args, will default to a)
c) --autostart-window-size=0 and --autostart-window-retry-limit=<positive 
value> indicates the autostart process to bail out if the retry limit exceeds 
irrespective of window period
d) --autostart-window-size=<x> and --autostart-window-retry-limit=<y> indicates 
the autostart process to bail out if the retry limit "y" is exceeded for the 
last window period "x".

      
          Status: Patch Available  (was: In Progress)

> 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: 0.98.23
>
>         Attachments: HBASE-15924.master.0001.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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Reply via email to