We are having a problem since upgrading to jruby 1.7.4 in production - files created by Tempfile don't get deleted when the instances of Tempfile are garbage collected, only when the jruby process exits.
I've managed to track down the change of behaviour to the commit 607c6d5 .
There is a test for exactly this behaviour in test/test_tempfile_cleanup.rb which dutifully breaks at exactly this commit (running with jruby test/test_tempfile_cleanup.rb)
We are seeing a problem with this because we are using the paperclip gem which unfortunately creates a lot of Tempfiles without taking care of closing and unlinking them explicitly. I guess there are/will be a lot of people with the same problem as paperclip is a quite popular gem.
Reinstate Tempfile finalizer to ensure it is deleted. Fixes #1133
Thanks for the report!
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