1770379 - Login delay from external web application server after CMS restart

When analyzing the TCP/IP states, the following scenarios can be observed:

Before shutting down:

tcp        0      0 10.0.0.1:56542         10.0.0.2:50000         ESTABLISHED 

tcp        0      0 10.0.0.1:38812         10.0.0.2:50000         ESTABLISHED 

tcp        0      0 10.0.0.1:46089         10.0.0.2:50000         ESTABLISHED 

tcp        0      0 10.0.0.1:46097         10.0.0.2:50000         ESTABLISHED 

(10.0.0.1 being the WAS, 10.0.0.2 being the CMS host, 50000 being the CMS Request Port - dynamically assigned)

After shutting down the CMS, all connections are releasd. When restarting the CMS, this scenario is revealed:

tcp        0      1 10.0.0.1:52333         10.0.0.2:50000         SYN_SENT    

The SYN_SENT state of the connection means that the WAS attempts to connect to the CMS on the old request port. That is the normal behaviour. Normally the destination returns a TCP RESET in case the port is closed. This is not the case in this scenario. The connection stays in SYN_SENT until it times out.