id author title date pages extension mime words sentences flesch summary cache txt github-com-2076 Warnings in app boot · Issue #122 · reidmorrison/rails_semantic_logger · GitHub .html text/html 837 189 69 Warnings in app boot · Issue #122 · reidmorrison/rails_semantic_logger · GitHub Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Sign up for GitHub Rails Semantic Logger 4.5.0 Rails Semantic Logger 4.5.0 config.rails_semantic_logger.processing = false config.rails_semantic_logger.add_file_appender = false config.rails_semantic_logger.format = :json config.semantic_logger.add_appender( formatter: config.rails_semantic_logger.format) No warnings when is in use with rails and puma. WARNING: Detected 2 Thread(s) started in app boot: The issue was successfully created but we are unable to update the comment at this time. The Semantic Logger thread being created is by design, without it no logging will be performed. Suggest looking into what is generating that warning log message, since it is not from Semantic Logger. I booted our application in clustered mode without any issues. As per the docs, just had to add SemanticLogger.reopen to the on_worker_boot to get logging working. ./cache/github-com-2076.html ./txt/github-com-2076.txt