Public bug reported:

Description:    Ubuntu 10.04.3 LTS
Release:        10.04

courier-imap:
  Installed: 4.6.0-2.1ubuntu1
  Candidate: 4.6.0-2.1ubuntu1
  Version table:
 *** 4.6.0-2.1ubuntu1 0
        500 http://ftp.uni-kl.de/pub/linux/ubuntu/ lucid/universe Packages
        100 /var/lib/dpkg/status

Originally, I had installed courier-ssl with all it's dependencies. It
also installed gamin.

Using the enhanced idle with courier led to the following error
messages:

Nov 15 16:17:07 lea imapd-ssl: FAMPending: timeout
Nov 15 16:17:16 lea imapd: FAMPending: timeout
Nov 15 16:17:17 lea imapd: FAMPending: timeout
Nov 15 16:17:23 lea imapd-ssl: FAMPending: timeout
Nov 15 16:17:25 lea imapd: FAMPending: timeout

Netstat was filled, too, with 50+ of

unix  3      [ ]         STREAM     CONNECTED     6923820  @/tmp/fam-
Debian-exim-

Mail-clients were lagging and hanging extemely when conneciton count to
courier got high.

Then I simply forced uninstall of "gamin" and replaced it with "fam".
Now the errors do not happen anymore and client's connection feel very
fast.

Looks like courier-imap has a bug with gamin in lucid.

** Affects: courier (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Description:    Ubuntu 10.04.3 LTS
  Release:        10.04
  
  courier-imap:
-   Installed: 4.6.0-2.1ubuntu1
-   Candidate: 4.6.0-2.1ubuntu1
-   Version table:
-  *** 4.6.0-2.1ubuntu1 0
-         500 http://ftp.uni-kl.de/pub/linux/ubuntu/ lucid/universe Packages
-         100 /var/lib/dpkg/status
+   Installed: 4.6.0-2.1ubuntu1
+   Candidate: 4.6.0-2.1ubuntu1
+   Version table:
+  *** 4.6.0-2.1ubuntu1 0
+         500 http://ftp.uni-kl.de/pub/linux/ubuntu/ lucid/universe Packages
+         100 /var/lib/dpkg/status
  
  Originally, I had installed courier-ssl with all it's dependencies. It
  also installed gamin.
  
  Using the enhanced idle with courier led to the following error
  messages:
  
  Nov 15 16:17:07 lea imapd-ssl: FAMPending: timeout
  Nov 15 16:17:16 lea imapd: FAMPending: timeout
  Nov 15 16:17:17 lea imapd: FAMPending: timeout
  Nov 15 16:17:23 lea imapd-ssl: FAMPending: timeout
  Nov 15 16:17:25 lea imapd: FAMPending: timeout
  
  Netstat was filled, too, with 50+ of
  
  unix  3      [ ]         STREAM     CONNECTED     6923820  @/tmp/fam-
  Debian-exim-
  
+ Mail-clients were lagging and hanging extemely when conneciton count to
+ courier got high.
+ 
  Then I simply forced uninstall of "gamin" and replaced it with "fam".
- Now the errors do not happen anymore.
+ Now the errors do not happen anymore and client's connection feel very
+ fast.
  
  Looks like courier-imap has a bug with gamin in lucid.

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https://bugs.launchpad.net/bugs/890756

Title:
  courier-imap, gamin: FAMPending: timeout

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