On 25/05/14 11:04, Sam Varshavchik wrote: > Leaving off MAXPERC should not be a factor. It defaults to, internally, > to MAXDAEMONS – effectively a no-op.
Right, thanks. > I presume that you've eliminated the low hanging fruit of actually reaching > the maximum number of connections. Yes, barely a dozen imapds running on the server with a MAXDAEMONS of 400 and I'd blame Thunderbird too but it wasn't happening 24 hours ago with Dovecot. An lsof of the gamin/gam_server daemon looks okay. A previous time I experienced something like this I had to change back to fam and remove gamin... years ago. Woops, yes, this is using Ubuntu 14.04 x64 (both ends)... courier-mta 0.68.2-1ubuntu3 courier-imap 4.10.0-20120615-1ubuntu3 courier-authlib-mysql 0.63.0-6ubuntu1 > Once MAXDAEMONS is reached, though, couriertcpd stops accepting connections > altogether... Those are the kinds of things to look at, here. That is not the case in this situation. Here's a imap log dump from Thunderbird in case something is obvious... at the point below I clicked on my Junk folder... 1759508352[7fa967a50370]: proposed url = INBOX.Junk folder for connection INBOX has To Wait = FALSE can run = FALSE 895477504[7fa938decd00]: 35ffa800:renta.net:S-INBOX:SendData: DONE [.. then TB hangs here for more than a minute ...] 895477504[7fa938decd00]: ReadNextLine [stream=37b40c10 nb=0 needmore=1] 895477504[7fa938decd00]: 35ffa800:renta.net:S-INBOX:CreateNewLineFromSocket: clearing IMAP_CONNECTION_IS_OPEN - rv = 804b000e 895477504[7fa938decd00]: 35ffa800:renta.net:S-INBOX:TellThreadToDie: close socket connection 895477504[7fa938decd00]: 35ffa800:renta.net:S-INBOX:CreateNewLineFromSocket: (null) 1759508352[7fa967a50370]: creating protocol instance to retry queued url:imap://ma...@renta.net@renta.net:143/select>.Junk 1759508352[7fa967a50370]: retrying url:imap://ma...@renta.net@renta.net:143/select>.Junk 1759508352[7fa967a50370]: 3303c800:renta.net:NA:SetupWithUrl: clearing IMAP_CONNECTION_IS_OPEN 895477504[7fa938decd00]: ImapThreadMainLoop leaving [this=35ffa800] 963634944[7fa9337ae450]: ImapThreadMainLoop entering [this=3303c800] 963634944[7fa9337ae450]: 3303c800:renta.net:NA:ProcessCurrentURL: entering 963634944[7fa9337ae450]: 3303c800:renta.net:NA:ProcessCurrentURL:imap://markc%40renta%2e...@renta.net:143/select%3E.Junk: = currentUrl 963634944[7fa9337ae450]: ReadNextLine [stream=37da8510 nb=256 needmore=0] 963634944[7fa9337ae450]: 3303c800:renta.net:NA:CreateNewLineFromSocket: * OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL ACL2=UNION STARTTLS LOGINDISABLED] Courier-IMAP ready. Copyright 1998-2011 Double Precision, Inc. See COPYING for distribution information. 963634944[7fa9337ae450]: 3303c800:renta.net:NA:SendData: 1 STARTTLS 963634944[7fa9337ae450]: ReadNextLine [stream=37da8510 nb=37 needmore=0] 963634944[7fa9337ae450]: 3303c800:renta.net:NA:CreateNewLineFromSocket: 1 OK Begin SSL/TLS negotiation now. 963634944[7fa9337ae450]: 3303c800:renta.net:NA:SendData: 2 capability 963634944[7fa9337ae450]: ReadNextLine [stream=37da8510 nb=133 needmore=0] 963634944[7fa9337ae450]: 3303c800:renta.net:NA:CreateNewLineFromSocket: * CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE AUTH=PLAIN ACL ACL2=UNION 963634944[7fa9337ae450]: ReadNextLine [stream=37da8510 nb=27 needmore=0] 963634944[7fa9337ae450]: 3303c800:renta.net:NA:CreateNewLineFromSocket: 2 OK CAPABILITY completed 963634944[7fa9337ae450]: try to log in 963634944[7fa9337ae450]: IMAP auth: server caps 0x4C3325, pref 0x1006, failed 0x0, avail caps 0x1004 963634944[7fa9337ae450]: (GSSAPI = 0x1000000, CRAM = 0x20000, NTLM = 0x100000, MSN = 0x200000, PLAIN = 0x1000, LOGIN = 0x2, old-style IMAP login = 0x4)auth external IMAP login = 0x20000000 963634944[7fa9337ae450]: trying auth method 0x1000 963634944[7fa9337ae450]: got new password 963634944[7fa9337ae450]: IMAP: trying auth method 0x1000 963634944[7fa9337ae450]: PLAIN auth 963634944[7fa9337ae450]: 3303c800:renta.net:NA:SendData: 3 authenticate plain 963634944[7fa9337ae450]: ReadNextLine [stream=37da8510 nb=4 needmore=0] 963634944[7fa9337ae450]: 3303c800:renta.net:NA:CreateNewLineFromSocket: + 963634944[7fa9337ae450]: 3303c800:renta.net:NA:SendData: Logging suppressed for this command (it probably contained authentication information) 963634944[7fa9337ae450]: ReadNextLine [stream=37da8510 nb=16 needmore=0] 963634944[7fa9337ae450]: 3303c800:renta.net:NA:CreateNewLineFromSocket: 3 OK LOGIN Ok. 963634944[7fa9337ae450]: login succeeded 963634944[7fa9337ae450]: 3303c800:renta.net:A:SendData: 4 select "INBOX.Junk" ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. 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