I have just upgraded to 1.1.8, hoping to fix these types of errors:
Jan 20 10:39:27 laura deliver(xxxxxx@example.net): Broken file /srv/storage/mail/store/net/example/xx/xxxxxx/Maildir/dovecot-uidlist line 156: Invalid data: Jan 20 10:41:19 laura dovecot: POP3(yy.yy@example.at): Broken file /srv/storage/mail/store/at/example/yy.yy/Maildir/dovecot-uidlist line 2: Invalid data:
Unfortunately, they still pop up. Since I suspect these errors to be responsible for customers complaining about downloading mails twice, I'd like to fix them.
Our setup has multiple servers sharing the same NFS-mounted directory for maildirs and indexes; we have set mmap_disable = yes dotlock_use_excl = yes fsync_disable = no mail_nfs_index = yes lock_method = fcntl
As far as I can tell, for at least one of these errors, there was no concurrent access to the mailbox in question.
What can I do to solve this problem, or to analyze it further?
Ulrich