[Twisted-Python] possible error in twisted app

[exarkun at twistedmatrix.com]

On 19 Jan, 09:27 pm, twisted-python at 2xlp.com wrote:
>Thanks for the offer to help.
>
>
>i'm not sure of the specifics on how / why this manifests, but if I 
>just use runInteraction and bypass using `deferToThread`, everything 
>works out perfect.

To intentionally slightly misinterpret you, the specifics might not be 
as interesting in this case as this general principle:

Twisted APIs are not safe to call except from the thread the reactor is 
running in.

There are exceptions, most notably `reactor.callFromThread`, but they 
are *extremely* rare.

Jean-Paul