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Date: Fri, 3 Jan 2014 00:42:51 +0000 (UTC)
From: "Andrew Purtell (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12687048.1388699221457.34972.1388709771697@arcas>
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Subject: [jira] [Commented] (HBASE-10271) [regression] Cannot use the
 wildcard address since HBASE-9593
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    [ https://issues.apache.org/jira/browse/HBASE-10271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13861021#comment-13861021 ] 

Andrew Purtell commented on HBASE-10271:
----------------------------------------

I would be in favor of reverting HBASE-9593 on all branches if a fix isn't expected within a few days.

> [regression] Cannot use the wildcard address since HBASE-9593
> -------------------------------------------------------------
>
>                 Key: HBASE-10271
>                 URL: https://issues.apache.org/jira/browse/HBASE-10271
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.0, 0.94.13, 0.96.1
>            Reporter: Jean-Daniel Cryans
>            Priority: Critical
>             Fix For: 0.98.0, 0.94.16
>
>
> HBASE-9593 moved the creation of the ephemeral znode earlier in the region server startup process such that we don't have access to the ServerName from the Master's POV. HRS.getMyEphemeralNodePath() calls HRS.getServerName() which at that point will return this.isa.getHostName(). If you set hbase.regionserver.ipc.address to 0.0.0.0, you will create a znode with that address.
> What happens next is that the RS will report for duty correctly but the master will do this:
> {noformat}
> 2014-01-02 11:45:49,498 INFO  [master:172.21.3.117:60000] master.ServerManager: Registering server=0:0:0:0:0:0:0:0%0,60020,1388691892014
> 2014-01-02 11:45:49,498 INFO  [master:172.21.3.117:60000] master.HMaster: Registered server found up in zk but who has not yet reported in: 0:0:0:0:0:0:0:0%0,60020,1388691892014
> {noformat}
> The cluster is then unusable.
> I think a better solution is to track the heartbeats for the region servers and expire those that haven't checked-in for some time. The 0.89-fb branch has this concept, and they also use it to detect rack failures: https://github.com/apache/hbase/blob/0.89-fb/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java#L1224. In this jira's scope I would just add the heartbeat tracking and add a unit test for the wildcard address.
> What do you think [~rajesh23]?


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