Technote Number: 1139373
Problem:
This issue was reported to Quality Engineering and has been addressed in Domino
6.0.4 and 6.5.2.
Excerpt from the Lotus Notes and Domino Release 6.0.4 / 6.5.2 MR fix list
(available at http://www.ibm.com/developerworks/lotus):
SSL
SPR# DPOS5MZPYQ - Fixed a problem with IMAP, SSL and IOCP session timeouts. In
this particular instance, the IMAP Session Timeout setting did not work over
the SSL port. The session remained open.
Currently the only workaround is to cycle the IMAP task on a regular basis, to
release the extra sessions as they build up. You can do this on a scheduled
basis through a Program document, using these steps:
1. Open the Administrative client, then make the server that you would like to
schedule the restart on your current server.
2. Select the Configuration tab and expand the Server twistie. Select the
Programs view.
3. Select "Add Program". In the Program name field, enter "nserver" (without
the quotes.) In the Command line field, enter the following:
-c "restart task imap" (the quotes surrounding "restart task imap" are
necessary.)
Ensure that the "Server to run on" field matches up with the desired server.
4. Adjust the interval and frequency of this Program document in the Schedule
section.
Supporting Information:
This issue will occur when IMAP clients are connecting to Domino using SSL.
After the session is established, the IMAP client stays connected, in an idle
state, and the connection is still active on the Domino server. If a show
tasks is performed, the IMAP task shows that it is providing service for that
user:
IMAP Server Providing service for Imap User/groovemachine <0x010097A0>
IMAP Server Listen for connect requests on TCP Port:143 SSL Port:993
IMAP Server Utility task
After the default idle time out for IMAP (30 minutes) is reached on the Domino
server, the client disconnects, but the Domino server still shows that the IMAP
task is providing service for the client. The standard disconnected message is
not displayed, and if the user connects again, a new session is spawned:
IMAP Server Providing service for Imap User/groovemachine <0x010157A0>
IMAP Server Providing service for Imap User/groovemachine <0x010097A0>
IMAP Server Listen for connect requests on TCP Port:143 SSL Port:993
IMAP Server Utility task
Executing a "show stat IMAP" command also reveals that a connection is active.
After subsequent connections by the same user, the sessions will build up,
which is evident through a show tasks, a show stat IMAP, and an NSD. The only
way to release these superfluous connections is to cycle the IMAP task, at
which time it will display disconnection messages for each session:
IMAP Server: 1.2.3.4 disconnected
IMAP Server: 1.2.3.4 disconnected
IMAP Server: All tasks have completed
IMAP Server: Shutdown More >
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