On 01:47 pm, [email protected] wrote:
Hello everybody,

I sometimes see the following error logged by a twisted application, it
only happens sporadically and I cannot even reproduce when trying to
re-execute the exact sequence of those failures. So giving an SSCCE is
quite impossible for now (sorry). Given this trace it's also hard to find
what was actually called/executed.

I've seen something like this with a somewhat old version of Twisted and a custom reactor. I never tracked down the cause.

What version of Twisted are you using, what platform are you on, and what reactor are you using?

Another useful bit of debug information would be to hack up the reactor's `addWriter` method to do a check of the argument. The call stack at *that* point (when the argument is a Port) is more interesting than the call stack at the point where `doWrite` is called.

Jean-Paul

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