[Twisted-Python] Names DNS Client too chatty

[Jason J. W. Williams]

Hi Guys,

I'd like to get ticket 4021 integrated in some fashion into Twisted. Currently, the Twisted Names client issues a "starting" and "stopping" log message on every resolution. It fills up the logs and makes seeing valuable log messages really difficult in the sea of DNS requests. 150,000 resolutions per day is generating 700mb of logs just from the start/stop. 

The problem is actually the UDP datagram transport that Resolver is based on. 4021 proposes to address the issue by wrapping the two log lines with "if self.noisy". 

I'd advocate this solution as it leverages the noisy attribute already expected to tamp down log chattiness. Also, it requires the smallest amount of code change as opposed to implementing a filter on the logging system. 

Honestly this has been a problem for me on more than one project I've used the Names client in. It's just untenable in a project with a high volume. 

Jean-Paul asked me to bring this up for discussion if I wanted to fix it. What do others think?

-J

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