Gabriel Rossetti wrote:
Hello everyone,
I have a question concerning defers, I have a service that needs to
query IO until it answers. The IO can be disconnected, connected but
off, connected and on; depending on the state I get different
exceptions. I wrote something like :
def __requestId(self, _):
d = self.callPlugin(PLUGIN_NAME)
d.addCallback(self.__receivedAns)
d.addErrback(self.__requestId)
The plugin makes the request in a thread and the deferred is returned
and called when either an answer is received or am exception is raised
(e.g. timeout, missing hardware, etc)
This seams to work well, except that when I let the system run for a
long time without the hardware being present or off (several
hours/days) the memory consumption goes way up. I don' t really know
what is causing this, and I'm looking for possible reasons, so I was
wondering if maybe this could be what is causing the problem. It's
probably not that, because from what I understand it works like this :
1. the first request is made
2. there is a timeout or something that raises the exception
3. the errback gets called
4. it makes a new request
5. the deferred gets garbage collected
6. the new request follows the same path
Can anyone confirm that this is correct, or are my defers somehow
staying alive and not being garbage collected?
Thank you,
Gabriel Rossetti
Forget it, I monkey-patched defer.Deferred to add __del__ to see if it
was called, and it was, so they are getting destroyed...
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