Github user yaoshengzhe commented on the pull request:
https://github.com/apache/spark/pull/126#issuecomment-37492214
@tdas, based on what you said, it's fine to put logic into finalize if we
can make sure code in finalize is done in the right way and accept the fact
that finalize might never be called. You also mentioned weak reference, I think
it is not a bad idea to use some kind of reference classes in java to solve
this problem. e.g. java's PhantomReference could guarantee to call cleanup
method when it is out of scope.
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