Thread.abort_on_exceptionを書き換えるコードを安全に並列実行する

parallel.rb

require 'parallel'
require 'retryable'

res = Parallel.map((1..10).to_a, in_threads: 10) do |a|
  Retryable.retryable(tries: 50) do
    Parallel.map([a], in_processes: 1) do |b|
      Thread.current.abort_on_exception = true
      exit if [1, 2].sample == 1
      b + 1
    end[0]
  end
end
p res