Tim Burke eb2fee80e8 Stop logging tracebacks when we're about to reraise
At that point, it's up to the caller to decide whether a stack trace is
appropriate; if the caller decides the connection error is recoverable,
us logging a traceback will only confuse things.

Also, prevent a TypeError during log interpolation by actually using the
argument we were providing.
2018-06-22 11:53:25 -07:00
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