> On 31 Jan 2017, at 11:56, Henrik Johansen <[email protected]> > wrote: > > >> On 30 Jan 2017, at 21:13 , Denis Kudriashov <[email protected]> wrote: >> >> >> 2017-01-30 20:25 GMT+01:00 Sven Van Caekenberghe <[email protected]>: >> Well, you should do your utmost best to prevent the situation in the first >> place (use startup/shutdown behaviour correctly). >> >> I remember I had those problems a lot in the beginning of Zn, especially >> when running tests that sometimes failed. >> >> Have you seen Zn's #isListening ? I think that was written to catch the case >> you described, but I am not sure it is 100% rock solid. >> >> Yes. This is exactly how I fix my case. >> But this post is about general problem which I think is very critical. >> >> In #isListening code I see extra condition "self serverSocket localPort = >> self port". Could you explain what case it is covered? >> > > Doesn't work on Windows; > https://pharo.fogbugz.com/f/cases/16939/Intermittent-monkey-failures-due-to-port-usage-in-server-tests > > IIRC, behaviour is different on all three platforms: > - Linux raises error > - Mac assigns different port than requested > - Win assigns requested port, but receives no traffic.
This is the curse of being x-platform, we don't see them often (luckily) but there are important (semantic) differences that sometimes make life (very) difficult. > How to detect the last one from image is a very good question (tm) indeed... > > Cheers, > Henry
