Repeated Host Lookups Failing In Urllib2

I have code which issues many HTTP GET requests using Python's urllib2, in several threads, writing the responses into files (one per thread). During execution, it looks like many

Solution 1:

This is not a Python problem, on Linux systems make sure nscd (Name Service Cache Daemon) is actually running.

UPDATE: And looking at your code you are never calling page.close() hence leaking sockets.