CODEWITHSUNDEEP
rubymultithreading
user245019
user245019

Reputation:

Ruby Threads Die?

I've been playing around with threads but I keep running into a problem where the treads seem to just die or stop.

Whats going on here? And how do I get round it?

I've included the code, but didn't paste it here as I think this problem is more fundamental to ruby. source code

thanks.

Edit Ruby 1.8, MacOS (snow leopard)

Upvotes: 0

Views: 1009

Answers (2)

regularfry
regularfry

Reputation: 3268

If you've got threads randomly "going away", make sure you've set Thread.abort_on_exception to true. That'll stop the interpreter if an uncaught exception reaches the top-level in a background thread (via SystemExit, so don't rescue Exception or they'll get swallowed), and can be immensely useful in tracking down random bugs.

Upvotes: 0

Josh Kovach
Josh Kovach

Reputation: 7749

It looks like you're forgetting to add your new Thread objects to your threads object.

3.times do |t|
  threads << Thread.new { word_list.process }
end

Your threads.each {|t| t.join} is working on an empty array, and so is ignoring the threads you did create. Make the change and it should wait.

Edit: I meant to << onto the array, not set it equal.

Upvotes: 3

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