The issue has appeared on some of my machines, X86 and X86_64 going back about 6 months. The system receives mail via postfix, which calls procmail as a transport, which calls /usr/lib/cyrus/deliver. Sometimes procmail will fail with that message, but not always, nor always for the same user. Changing the procmail delivery service in postfix to perform one delivery at a time didn't help. Reemergeing stuff doesn't help. Reproducible: Sometimes Expected Results: Something changed a while back, the compiler, glibc, cyrus, db, something... procmail performs a locking test during emerge, and that works ok. I've got an instance of a user failing repeatably, so I'll try and instrument it. In other cases, I've removed procmail and call deliver directly. However this customer needs an autoresponder...
OK, I just haven't the means to diagnose this. However I found a workaround sufficent for my purpose. In postfix Main.cf put mailbox_transport=cyrus Thats then the default, avooiding the buggy procmail. put a line mailbox_transport_maps=Hash:/ .... When I have to use procmail for a user, normally to run an auto responder, I put username procmail in there for the duration and remove it as soon as possible. nasty, but it works. If someone with huge debugging mojo can look at it sometime, I'd be greatful.
