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YanhaoYang/puma.rb

Created October 19, 2018 18:41
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Print the call stacks in a multithread application, say puma, to know which threads are blocked
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puma.rb
before_fork do
trap 'TTIN' do
Thread.list.each do |thread|
puts "\nThread TID-#{thread.object_id.to_s(36)}"
puts thread.backtrace.join("\n")
puts "\n"
end
end
end
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