Hi, I am have a ERP app em Ruby on Rails, and i need this aplication allow concurrency, when a uncomment config.threadsafe! at the first page a get this error: ArgumentError (dump format error(û)): or ArgumentError (dump format error(x027)): etc... After this I need comment config.threadsafe! and run a rake db:session:clear to my app work again. I saw the command config.threadsafe! do this: config.preload_frameworks = true config.cache_classes = true config.dependency_loading = false config.allow_concurrency = true And this error happens when config.preload_frameworks = true is set Anyone knows if have a problem if a set allow_concurrency if preload_frameworks = false? -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-talk/-/1Ur1xFAFv64J. For more options, visit https://groups.google.com/groups/opt_out.