LAST MODIFIED DATE: October 12, 2006

VERSION: This applies to Exceed onDemand version 5.1

PROBLEM:

With Exceed onDemand Server 5.1.4.0 installed on a Linux platform, the user runs a gnome session from another Linux host.

Within the gnome session, the user is running several Terminal windows and a Cadence application. After two hours, the gnome session becomes disconnected, as if the user "logged off." They are immediately taken back to the login screen.

SOLUTION:

This is not a problem with Exceed onDemand but with the Linux host.

Change the tcp_keepalive_time:

From the Linux host system (not where Exceed onDemand Server is installed), run the following command to check the current setting:

cat /proc/sys/net/ipv4/tcp_keepalive_time

It should print 7200, which is 7200 seconds (2 hours), if so then please run the following command to change its value to 86400 (24 hours)

echo 86400 > /proc/sys/net/ipv4/tcp_keepalive_time

Then start a new Exceed onDemand session for a GNOME session of this system, and see if the sessions are still active after two hours. Please note changing the value in the above step is not permanent, so it should be repeated whenever the system restarts, or /etc/sysctl.conf file can be used to enter a new entry (something like "net.ipv4.tcp_keepalive_time = 86400") to make it permanent.