Hi folks,
I'm writing some fairly simple logging code that makes use of the
SocketHandler.
The example server code works fine, as expected. (http://
docs.python.org/lib/network-logging.html)
However, initially, I had tried it with a server that closed the
connection after receiving each record, and the SocketHandler doesn't
seem to behave as advertised.
My test script was simply this:
#!/usr/bin/python
import logging
import logging.handlers
import time
import sys
port = 12345
handler = logging.handlers.SocketHandler('localhost', port)
l = logging.getLogger("my-logger")
l.addHandler(handler)
l.addHandler(logging.StreamHandler(sys.stdout))
l.setLevel(logging.DEBUG)
for i in xrange(10):
l.info("Log message %i", i)
time.sleep(1)
My test server received messages 0, 3, 6 and 9.
Doing a packet capture with wireshark confirmed that it only made 4
connections.
The SocketHandler documentation says that it will re-establish the
connection if it has been closed. After a bit of digging, I found a
patch had been submitted and accepted that made it back off
exponentially. However, this should be time based. Even if I make my
sleep here 30 seconds, my server still only receives messages 0, 3, 6
and 9.
I'm concerned that if a connection is lost at some point, I will
always lose at least 2 log messages.
Is there some reason for this that I am not aware of? Have I
misunderstood something, or is this a bug?
-Oliver
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