2.3.7 on frontend and one backend (RedHat 5) and 2.3.9 on the other backend (freebsd 6.1). Most of errors are between frontend (imap2) and freebsd backend (imap-old) and protocol is pop3: Oct 25 20:37:30 imap2 pop3[12945]: connect(imap-old.amis.net) failed: Connection timed out Oct 25 20:37:30 imap2 pop3[12945]: couldn't authenticate to backend server When this occurs, users are asked to enter their passwords again. There is no record in imap-old about this connection. Problems between frontend and other backend (imap1) with pop3 happens when user mailbox is locked: Oct 25 20:51:10 imap1 pop3[27158]: Unable to lock maildrop user.alext: Mailbox is locked by POP server or when there is something wrong with user's mail client program: Oct 25 20:51:28 imap2 pop3[23897]: Fatal error: Lost connection to input stream There is also errors regarding imap protocol: Oct 25 20:52:05 imap2 imap[20960]: Fatal error: Lost connection to selected backend Oct 25 20:52:33 imap2 imaps[7912]: Fatal error: Lost connection to selected backend but it seems that these errors are invisible to the users. There is no errors regarding lmtp. Network traffic is 20-30 Mb/s during peak period, imap1 and imap2 are on the same switch (100Mb/s ports), imap-old is on the switch which is connected by 1Gb/s whith first switch. Regards, Vladimir Ken Murchison wrote: > Vladimir Nikolic wrote: > >> Hi, >> >> I have questions regarding murder scalability. Untill last week we had >> one imap server with about 50000 users and 2TB mailboxes. Server was >> overloaded and little slow but there was no troubles like connections >> drop and repeatedly asking users for password. >> Now we have that old server and three new servers in murder >> configuration (1 frontend, 1 murder master in 2 backends) and we have >> full troubles with users (almost all of them with pop3 accounts) >> complaining that mail clients repeatedly asking for password. Logs on >> fronted are full of lines: >> >> pop3[12914]: couldn't authenticate to backend server >> pop3[9822]: couldn't authenticate to backend server: authentication failure >> > > What version of Cyrus? > > Do you only have this problem with POP3? IMAP and LMTP connections are > proxied to the backends without any problems? > > ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
