Setting the KARAF_DEBUG environment variable does not open the default debug port (5005) . To reproduce: *Register a FuseESBEnterprise-7.0.0 as a server in IDE 2.1. *Double click to get the server Overview *Open launch configuration *Click on the Environment tab *Add variable KARAF_DEBUG value true *Append environment to native environment *Click OK *Right click on the server and Start I would expect to see the following as per setting "export KARAF_DEBUG=true" on the command line: karaf: Enabling Java debug options: -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005 Listening for transport dt_socket at address: 5005 Please wait while Fuse ESB is loading... Port 5005 is closed to telnet