On Tue, March 20, 2012 5:07 pm, Robert Linden wrote: > Hello! > > > I just encountered a rather tricky problem and maybe somebody can benefit > from the solution. > > If one wants to have multiple instances of imapd, for example to support IMAP > and IMAPS, or to listen on multiple interfaces (but not all/0.0.0.0, or if > one needs different configurations for the separate services), then the > recommended way is to just have multiple lines in the SERVICES section. > > The name of the service (first parameter in the line) is also used in the > filename of a lockfile, that needs to be unique for each service, otherwise a > deadlock can occur, where multiple services want to hold a lock on the same > file. The result will be 1-2 minute long freezes on any connection attempt. > > This problem was already described by Tuomas Toropainen in this mail: > > > http://lists.andrew.cmu.edu/pipermail/info-cyrus/2007-January/024910.html > > > The tricky part is, that not all names that look distinct really are treated > differently by cyrus. Notable example: "imap" and "imap_remote" result in the > same lockfile (/var/imapd/socket/imap-0.lock), because the name is truncated > at the '_'. The '_' doesn't seem to be illegal per se, because cyrus does not > complain and the service runs ok most of the time, i.e. as long as no > concurrent connections are created on the 2 interfaces to trigger the race- > condition. > > Maybe other characters cause this problem as well, so if one is unsure about > this it would be best to just stick to alphanumeric characters. Robert, The hyphen ("-") is also known to create issues. I reported this to info-cyrus on Wed, October 27, 2010 Eric Luyten, Computing Centre VUB/ULB. ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/
