Tim Abbott 1396eb7022 Fix Tornado memory leak of handler objects. ...

In 2ea0daab19, handlers were moved to
being tracked via the handlers_by_id dict, but nothing cleared this
dict, resulting in every handler object being leaked.  Since a Tornado
process uses a different handler object for every request, this
resulted in a significant memory leak.  We fix this by clearing the
handlers_by_id dict in the two code paths that would result in a
Tornado handler being de-allocated: the exception codepath and the
handler disconnect codepath.

Fixes #463.

2016-03-17 18:33:59 -07:00

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