The error is likely due to a missing ssl cert. 

Try this in the following order:

$service ambari stop
$sudo puppet master --no-daemonize --debug
[ this will run in the foreground so once it comes up , go ahead and kill it 
once the logs stop scrolling ] 
$service ambari start

The intermediate step is to create the ssl certificate if it did not get 
created or was deleted by mistake. 

-- Hitesh

On Sep 6, 2012, at 1:47 AM, Guo Leitao wrote:

> I'm new to Ambari, and this is my first to config Ambari.
> 
> After installed ambari-agent, ambari andhdp_mon_dashboard according to 
> http://incubator.apache.org/ambari/install.html, I can not start ambari 
> service.  Here is error output. Any more configuration to puppet should I do? 
> Thanks!
> 
> # service ambari start
> Starting Ambari Installer 
> Starting httpd: Syntax error on line 35 of /etc/httpd/conf.d/
> puppetmaster.conf:
> SSLCertificateFile: file '/var/lib/puppet/ssl/certs/compute-34-09.local.pem' 
> does not exist or is empty
>                                                            [FAILED]
> Failed to start Ambari

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