Puppetserver fails with a load error of "concurrent"

[Sander de Boer]

After a crash of the server (Ubuntu 18.04) our puppetserver (6.2.1) process refuses to start with the message it can not find the file/directory "concurrent".

It looks like this is a JRuby/Java problem.

...

Oct  9 09:18:12 foreman puppetserver[32556]: LoadError: no such file to load -- concurrent

Oct  9 09:18:12 foreman puppetserver[32556]:           require at org/jruby/RubyKernel.java:970

Oct  9 09:18:12 foreman puppetserver[32556]:           require at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:59

Oct  9 09:18:12 foreman puppetserver[32556]:            <main> at /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/thread_local.rb:1

Oct  9 09:18:12 foreman puppetserver[32556]:           require at org/jruby/RubyKernel.java:970

Oct  9 09:18:12 foreman puppetserver[32556]:           require at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:59

Oct  9 09:18:12 foreman puppetserver[32556]:            <main> at /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/context.rb:1

Oct  9 09:18:12 foreman puppetserver[32556]:           require at org/jruby/RubyKernel.java:970

Oct  9 09:18:12 foreman puppetserver[32556]:           require at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:59

Oct  9 09:18:12 foreman puppetserver[32556]:   <module:(root)> at /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/context.rb:1

Oct  9 09:18:12 foreman puppetserver[32556]:            <main> at /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:1

Oct  9 09:18:12 foreman puppetserver[32556]:           require at org/jruby/RubyKernel.java:970

Oct  9 09:18:12 foreman puppetserver[32556]:            Puppet at /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:41

Oct  9 09:18:12 foreman puppetserver[32556]:            <main> at /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet.rb:38

Oct  9 09:18:12 foreman puppetserver[32556]:           require at org/jruby/RubyKernel.java:970

Oct  9 09:18:12 foreman puppetserver[32556]:            (root) at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:1

Oct  9 09:18:12 foreman puppetserver[32556]:            <main> at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:59

Oct  9 09:18:12 foreman puppetserver[32556]:           require at org/jruby/RubyKernel.java:970

Oct  9 09:18:12 foreman puppetserver[32556]:            (root) at uri:classloader:/puppetserver-lib/puppet/server.rb:1

Oct  9 09:18:12 foreman puppetserver[32556]:            <main> at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:1

Oct  9 09:18:12 foreman puppetserver[32556]: Exception in thread "main" java.lang.IllegalStateException: There was a problem adding a JRubyInstance to the pool.

...

Anyone any experience with this?

Thanks in advance!

Sander

[Justin Stoller]

The Puppet Server and Puppet Agent brought in a dependency on the concurrent gem in versions 6.7.0 & 6.9.0 respectively (the server and agent are unfortunately versioned slightly differently).

On the master, the Agent and the Server also share Ruby code. So if you have a Server >= 6.7 with an Agent < 6.9 or vice versa, you may see the error for that reason.

The Server should work with many versions of the Agent over the wire, however it requires a similar versioned agent to itself colocated on the same host. I would see what Agent version you're running and either downgrade the Agent or upgrade the Server.

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