Upgrading from 2.2.2-Beta to 2.2.8

[Paul Boven]

Hi everyone,

I've got a 2.2.2-beta-installation that has started to give us some 
headaches: every few days, it will first get 'slow' (according to 
complaints from the customer) and then it will stop listening to the 
LMTP socket and IMAP port, and things just hang. I'm also finding 
coredumps from mailbox_expunge[1] in several mailboxes.

We've decided our best course of action would be to upgrade the customer 
  to 2.2.8 which we have running elsewhere already. I've done a first 
test-migration, setting up a 2.2.2-beta system and then removing the 
Cyrus Imap binaries and installing the 2.2.8-package on it. Seemed to 
work just great.

Which brings me to my main question: Are there any things I need to 
worry about when doing such an upgrade? Do I need to take care of 
possible mailbox-corruption first, and if so, how? Any chance that some 
DBs have changed type between 2.2.2-Beta and 2.2.8?

Regards, Paul Boven.

[1] stacktrace from those cores (they're all the same)
  00020d08 cmd_expunge (11a088, 0, ffc00, 8e76ea04, 0, 1) + 40
  0001ab90 cmdloop  (0, 1124c8, 0, 0, 0, 100400) + bc0
  00019dc0 service_main (0, 10f998, ffbffd9c, 1, ffbff918, 1) + 2f8
  000189bc main     (1, ffbffd94, 3c, fa, 10f000, 0) + 4c8
  000180c0 _start   (0, 0, 0, 0, 0, 0) + 5c
Systems in question are all Solaris 9.
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