On Wed, Jan 18, 2012 at 09:03:18PM +0200, Timo Sirainen wrote:
I think the way I originally planned LMTP proxying to work is simply too complex to work reliably, perhaps even if the code was bug-free. So instead of reading+writing DATA at the same time, this patch changes the DATA to be first read into memory or temp file, and then from there read and sent to the LMTP backends:
http://hg.dovecot.org/dovecot-2.1/raw-rev/51d87deb5c26----8<----8<----8<-----8<-----8<-----8<----8<-----8<----8<----8<--
unfortunately I haven't tested that patch, so I have no idea if it fixed the issues or not...
I'm not sure if that patch is useful or not. The important patch to fix it is http://hg.dovecot.org/dovecot-2.0/rev/71084b799a6c
I now implemented this patch on our directors, and pointed postfix at them. No problem seen so far, but I'm still a bit uncertain about the LMTP_PROXY_DATA_INPUT_TIMEOUT_MSECS. I know we're experienceing quite large delays when fsync'ing (slow IMAP APPEND). Do you think increasing LMTP_PROXY_DATA_INPUT_TIMEOUT_MSECS is a sensible workaround if we start seeing lmtp_proxy_output_timeout problems again ?
-jf