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Subject: Re: ROOT region not assigned
From: Stack <stack@duboce.net>
To: user@hbase.apache.org
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On Tue, Jan 17, 2012 at 7:19 AM, Henning Blohm <henning.blohm@zfabrik.de> wrote:
> Hi,
>
> After an upgrade of hadoop and hbase (to 0.90.4-cdh3u2) from 0.90 hbase and
> 0.20-append hadoop on a single node test installation everything worked fine
> initially.
>
Would suggest you go to 0.90.5 while you are going about upgrades Henning.

> Then there was some DNS changes and host name changes which resulted in a
> lot "hostname <oldname> cannot be resolved" problems in the logs and the
> master web interface would only show a stack trace from a bad lookup
> ("hostname can't be null").
>

Did you scrub the zk data for this cluster?  It was picking up old
root location from zk?  That might have helped.


> Master Startup, Assigning ROOT region, 10050s
>
> i.e. it never continues.
>

Paste a bit of log Henning up in pastebin.


St.Ack