Delayed job sends duplicate emails with Tomcat's parallel deployements

[nasa42]

We are using Tomcat parallel deployment feature (https://tomcat.apache.org/tomcat-7.0-doc/config/context.html#Parallel_deployment), and we have noticed that Delayed Job will send duplicate emails if there are more than one deployments of the same project in parallel.

Not entirely sure but seems like Delayed Job locking is bypassed because threads in different processes get the same name? https://github.com/kares/jruby-rack-worker/blob/master/src/main/ruby/delayed/jruby_worker.rb#L12

[kares]

sounds like you know the issue and can work around it - for me its been a while and it will take me some to get into the DJ's internals. what name do they get than, is it different from the default? maybe provide a sample (or test) case that passes with DJ's multi-process architecture but fails with multi deploys ...

[nasa42]

How do you build the gem? I'm trying to fix it in my fork but found no jruby-rack-worker.gemspec file.