Issue #18573 has been updated by Josh Cooper.

Status changed from Duplicate to Needs More Information
Assignee set to Brian Wong

Thanks to Bruno for poking at this and #18812 some more. I agree with Ken 
Barber's 
[comment](https://groups.google.com/d/msg/puppet-users/Ek4jSO7zC1E/XkpFQrwlZ7sJ)
 that this is an issue with how puppet configures the webrick. In ruby 1.9, 
webrick always calls:

<pre>
                  sock.do_not_reverse_lookup = config[:DoNotReverseLookup]
</pre>

with a default value of nil, so it will perform a reverse DNS lookup (when it 
didn't in 1.8).

Brian, can you confirm that you're using the default puppet master setup (and 
not rack), and ruby 1.9?

----------------------------------------
Refactor #18573: File downloads from pluginsync extremely slow
https://projects.puppetlabs.com/issues/18573#change-87124

* Author: Brian Wong
* Status: Needs More Information
* Priority: Normal
* Assignee: Brian Wong
* Category: 
* Target version: 
* Affected Puppet version: 3.0.1
* Keywords: DNS pluginsync
* Branch: 
----------------------------------------
The [standard library module](http://forge.puppetlabs.com/puppetlabs/stdlib) 
provides numerous parser functions. It is extremely slow on my client's first 
puppet agent invocation to download these files. I found that each file 
downloaded requires a DNS call to the puppet server. 

I am not sure if it is advantageous, or even possible, to download plugins from 
multiple sources and therefore believe there should only be one DNS call made 
regardless of how many files must be downloaded. It is extremely inefficient in 
the current model.

The problem happens only when I am using my Vagrant VMs as Puppet clients 
though the problem is not limited to these systems. Other systems, notably 
those running in EC2 (VPC) do not experience the problem. This is because the 
DNS calls made in EC2 return much more quickly than my local virtual machine 
setup. My situation is quite similar to [this user 
experience](https://groups.google.com/forum/?fromgroups=#!topic/puppet-users/Ek4jSO7zC1E)
 but the solution does not apply to me as it is not the Puppet server 
performing DNS calls in my case. A `tcpdump` on both server and client during 
the pluginsync has proven this to me.

I am running CentOS 6.3 on both client and server. The puppet version on both 
client and server is 3.0.1.

Please refactor/redesign the DNS calls performed during the pluginsync 
operation to reduce unnecessary network calls. Thank you.


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