On 30/09/2010 15:33, exarkun@twistedmatrix.com wrote:
2010-09-30 15:07:03,161 ERROR : log (22194|7f41910b26e0): Unhandled Error Traceback (most recent call last): File "test_looping.py", line 47, in<module> reactor.run() File "/twisted/internet/base.py", line 1166, in run self.mainLoop() File "/twisted/internet/base.py", line 1175, in mainLoop self.runUntilCurrent() ---<exception caught here> --- File "/twisted/internet/base.py", line 779, in runUntilCurrent call.func(*call.args, **call.kw) File "test_looping.py", line 30, in __call__ del self.connector exceptions.AttributeError: Break instance has no attribute 'connector'
This is not logged by your code. Do you recognize that?
Yes, this is what I'm complaining about ;-)
/twisted/internet/defer.py:262: DeprecationWarning: Don't pass strings (like 'Break!') to failure.Failure (replacing with a DefaultException). fail = failure.Failure(fail) 2010-09-30 15:07:05,167 ERROR : log (22194|7f41910b26e0): Unhandled scheduled exception Traceback (most recent call last): Failure: twisted.python.failure.DefaultException: Break!
This comes from some code not included in the code you posted.
Sure it is, it was attached to the message I sent at 14:36.
It looks like you're using Failure wrong though.
Sure, but that's hardly the issue at hand here... What should I be passing to errback?
So, how come my log.err doesn't get used for the AttributeError on connector?
Your Deferred *never* fires with a Failure corresponding to that AttributeError. This is the most important thing. If you don't understand this, say so and we can talk about it some more. Everything else is just confusing particulars.
Yes, I understand this, and this is what I'm talking about when I say "I cannot gracefully handle the exception." Reading back, yes, it appears I was mistaken at some stage that my `loop` function was handling the exception, but I do understand now that it was not... which is frustrating...
The AttributeError never becomes an error result on any Deferred. It is caught inside the reactor implementation, logged there by Twisted itself, and then thrown away forever.
:-( Chris