2009-06-17 04:10:05 UTC
We found out that the reason is AVG (an anti virus program). The YAWL engine startup routine checks if another tomcat instance is running already, by trying to connect to port 8080. This connection attempt is blocked by AVG and misinterpret by the startup routine.
In YAWL 2.0 RC2 the startup routine is changed. Now it is tried to do a server bind instead of a connection.
Thank you Evandro for highlighting this.
Stephan