Thanks for the help. It accepts and logs the connection, so that isn't the problem.
There's also no NFS. It seems to be Fam/Gamin that is causing the issues. As documented at the Debian bug Racke linked to (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=669146#65) installing fam and libfam0 seems to 'fix' the problem. Phil Phil Lavin | Developer Tel: 01788 566 270 | Web: www.propcom.co.uk -----Original Message----- From: Sam Varshavchik [mailto:mr...@courier-mta.com] Sent: 01 May 2012 23:22 To: courier-imap@lists.sourceforge.net Subject: Re: [Courier-imap] Courier IMAP has stopped acknowledging logins or accepting commands Phil Lavin writes: > « HTML content follows » > > This is a very weird problem. I did a standard apt-get upgrade on > Debian and got Courier IMAP 4.9.3-4. On upgrade all worked fine, > however within 2 hours the imapd stopped acknowledging successful > logins. When it works, it returns > “1 OK LOGIN Ok.”. When it stops working, it returns nothing. The > state, as I know it, is thus: Check for the number of concurrent connections at that time. The server enforces an upper limit on the number of concurrent connections overall, and the maximum number from a given IP address. When the limit has been reached, the server stops accepting any more connections. > · It will acknowledge and log failed logins > > · It will not acknowledge or log successful logins and it will > not accept commands after a valid login is supplied If, for example, you're running NFS and the kernel hangs the user process on a stalled NFS request, that's still an active connection, for all intents and purposes. Until the process terminates, the connection exists. After some time elapses, a sufficient number of dead zombies made the number of active connections reach its maximum. That would be another possibility. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Courier-imap mailing list Courier-imap@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-imap
