Re: finding out what's blocking the reactor

Glyph <[email protected]> Mon, 13 May 2019 09:46:40 -0700
Newsgroups gmane.comp.python.twisted
Message-ID <[email protected]>

> On May 13, 2019, at 7:26 AM, Chris Withers <[email protected]> wrote:
> 
> Hi All,
> 
> On some busy instances of the app I'm working with/on, we see websocket connections being dropped due to not ping/ponging in time, I'm fairly sure this is as a result of some user-written callbacks blocking the reactor for long periods of time (seconds...).
> 
> What's the best way to debug a twisted application to find out what's blocking the reactor?

I don’t know about “the best”, but I’ve had some success with https://vmprof.readthedocs.io/en/latest and https://github.com/ggreer/twisted_hang depending on what you’re looking for.

Let us know if these work out!

-g

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