On Tue, Jan 17, 2012 at 7:19 AM, Henning Blohm <[email protected]> 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
