Puppet users - Oct 2014 - certificate verify failed: [unable to get local issuer certificate

Hi all,

When I run "puppet agent --test", I got this error: 

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: 
Failed to submit 'replace facts' command for example.com to PuppetDB at 
example.com:8081: SSL_connect returned=1 errno=0 state=SSLv3 read server 
certificate B: certificate verify failed: [unable to get local issuer 
certificate for /CN=example.com]

It was working before and I don't know what has changed to cause this 
problem.

Also if I try to access puppet master (https://example.com:8140) on local 
machine from Firefox, I got error as below, but remote access is working:

Your certificate contains the same serial number as another certificate 
issued by the certificate authority.  Please get a new certificate 
containing a unique serial number. 
(Error code: sec_error_reused_issuer_and_serial)

thanks,
Stacey

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