> Da: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Per conto di Wietse Venema > > Victor Duchovni: > > On Thu, Sep 25, 2008 at 11:49:33AM -0400, Wietse Venema wrote: > > > > > In your case, the smtpd process gets stuck, the cleanup process > > > gives up after waiting for one hour, and then the smtpd process > > > becomes un-stuck more than 9 minutes later. In the mean time, the > > > SMTP client and the cleanup process have gone away, but of course > > > the smtpd process discovers that only after it becomes un-stuck. > > > > > > I have no idea why the smtpd process would get stuck except of > > > course for kernel bugs. > > > > Or network data dribbling in very slowly, so that smtpd is > not so much > > stuck as swimming through a tarpit. To discover which, a > (full packet > > binary) tcpdump capture is required. > > I wonder if the machine is running something that slows down traffic > that looks "suspicious" to a data rate of 1 byte/s.
But the same behaviour is exhibited by two machines, connected to the Internet by completely different carriers with different service agreements. The two machines exhibit the same problem, but not on the same messages and not at the same time. I know nothing on the machines that can shape the traffic. I think I'm going to sniff the connections. Unfortunately the problems happens only about once in a week.
