On Monday, January 1, 2018 at 5:52:10 PM UTC-5, Matt Wise wrote:
>
> *Puppet Agent: 5.3.2*
> *Puppet Server: 5.1.4 - Packaged in Docker, running on Amazon ECS*
>

I'm running a docker-compose based puppet setup, and had the same problem.  
Short version was to increase the java heap size for the JRuby instances 
for puppetserver.

Using the docker-compose.yml, I added:

    environment: 
      - PUPPETSERVER_JAVA_ARGS=-Xmx1024m 

to the puppet stanza, which gets passed to the puppetserver init script.

We also increased the number of JRuby instances to 7, but that might be 
overkill (roughly 200-250 nodes).  That also means 8 gigs of memory on the 
docker host.

The agents would eventually time out, but I seem to recall it was on the 
order of hours for the timeout.

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