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Date: Fri, 18 Sep 2015 15:47:47 -0400
Subject: Catching exceptions from logging socket handler
From: Larry Martell <larry.martell@gmail.com>
To: "python-list@python.org" <python-list@python.org>
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Xref: csiph.com comp.lang.python:96833

I have a socket logging handler and I want to be able to catch
exceptions from it. Specifically, I want to know if the remote side
has gone away so I can close the socket and reopen it when the remote
side come back.

What happens now is that I get Broken pipe and BAD_WRITE_RETRY
exceptions, but it's not coming from any functions I directly call. is
there any way to catch these?

Traceback (most recent call last):
  File "/home/ecovent/python2.7.9/lib/python2.7/logging/handlers.py",
line 579, in emit
    self.send(s)
  File "/home/ecovent/python2.7.9/lib/python2.7/logging/handlers.py",
line 520, in send
    self.sock.sendall(s)
  File "/home/ecovent/python2.7.9/lib/python2.7/ssl.py", line 701, in sendall
    v = self.send(data[count:])
  File "/home/ecovent/python2.7.9/lib/python2.7/ssl.py", line 667, in send
    v = self._sslobj.write(data)
SSLError: [SSL: BAD_WRITE_RETRY] bad write retry (_ssl.c:1625)

Traceback (most recent call last):
  File "/home/ecovent/python2.7.9/lib/python2.7/logging/handlers.py",
line 579, in emit
    self.send(s)
  File "/home/ecovent/python2.7.9/lib/python2.7/logging/handlers.py",
line 520, in send
    self.sock.sendall(s)
  File "/home/ecovent/python2.7.9/lib/python2.7/ssl.py", line 701, in sendall
    v = self.send(data[count:])
  File "/home/ecovent/python2.7.9/lib/python2.7/ssl.py", line 667, in send
    v = self._sslobj.write(data)
error: [Errno 32] Broken pipe