Hi all, I would like to refer to intridea/grape#281 for the issue we were experiencing a couple of days ago with running grape (with has rack-mount as a dependency) and puma as a webserver. After a restart we were able to fix it but it seems to us that Rack::Mount could have some threading issues. I am not an expert at this and i can only try to pinpoint where the potential issue is located. It seems that regin.rb is autoloading the Parser class ('regin/parser') and at the end of the parser.rb it requires 'regin/tokenizer' which then defines the scan_str method which the stacktrace is complaining about. I think in line 545 it could go wrong if tokenizer is not loaded yet. Any feedback? -- --- You received this message because you are subscribed to the Google Groups "Rack Development" group. To unsubscribe from this group and stop receiving emails from it, send an email to rack-devel+unsubscribe@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.