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From "Zhihong Yu (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5213) "hbase master stop" does not bring down backup masters
Date Fri, 02 Mar 2012 23:44:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221354#comment-13221354
] 

Zhihong Yu commented on HBASE-5213:
-----------------------------------

In stop-hbase.sh, I see:
{code}
  # TODO: store backup masters in ZooKeeper and have the primary send them a shutdown message
  # stop any backup masters
  "$bin"/hbase-daemons.sh --config "${HBASE_CONF_DIR}" \
    --hosts "${HBASE_BACKUP_MASTERS}" stop master-backup
{code}
We have several options:
1. adding a "shutdown node" in ZK on which all masters should listen
2. introducing "backup masters" node in ZK so that we know where shutdown message should be
sent
                
> "hbase master stop" does not bring down backup masters
> ------------------------------------------------------
>
>                 Key: HBASE-5213
>                 URL: https://issues.apache.org/jira/browse/HBASE-5213
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Gregory Chanan
>            Priority: Minor
>
> Typing "hbase master stop" produces the following message:
> "stop   Start cluster shutdown; Master signals RegionServer shutdown"
> It seems like backup masters should be considered part of the cluster, but they are not
brought down by "hbase master stop".
> "stop-hbase.sh" does correctly bring down the backup masters.
> The same behavior is observed when a client app makes use of the client API HBaseAdmin.shutdown()
http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/HBaseAdmin.html#shutdown()
-- this isn't too surprising since I think "hbase master stop" just calls this API.
> It seems like HBASE-1448 address this; perhaps there was a regression?

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