I have the latest cyrus 2.3.16 but I run into frequent pop lock issues where the pop3 server process just won't timeout and it locks the account. I have used a patch followed on this list that allows me to set a pop3timeout less than 10 minutes and currently it's set at 3 minutes but that didn't help because the server doesn't seem to honor any timeout. To test that the client isn't sending anything, I connected to the process with strace and it shows absolutely nothing going: root@server:/var/log# time strace -p 16996 Process 16996 attached - interrupt to quit write(1, "3nI8\212S%\315\n\221\363m\213\203\377\3101\30(\334\332"..., 2762 <unfinished ...> Process 16996 detached real 17m0.327s user 0m0.000s sys 0m0.004s It looks like it's stuck on a write of some kind, but that is blocking the timeout. Anyone have any ideas? This problem is causing upper management to want to switch to exchange and I really don't want to deal with that.
FWIW, there *used* to be many problems like that, but that was in earlier releases. I worked with the developers to fix those issues. At our site we haven't had that problem since (we're running 2.3.14 now), so I'm not sure why you're still seeing any. FWIW, the stuck process that we saw were all TLS or SSL connections of dial-up clients. When the dial-up connection got dropped at the wrong moment, the processes stuck around forever. Before the fix I had implemented a cronjob that regularly killed old pop3 processes, because no pop3 process should live longer than maybe 30 minutes ...
Check the archive for "stuck processes" for details.
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