“Where will the pipeline values will gets stored while running a service in developer?”
In memory. Strictly speaking, a service does not run “in” Developer. It runs on IS. Developer sends commands to IS and IS runs the service, returning the results to Developer.
“Also what are the different ways of killing the execution of a webMethod service?”
Restarting IS is the only reliable way without potentially causing issues. Killing a thread in a JVM (which is what is needed to kill a service) is problematic (material on the web). If memory serves, there is a discussion or two on these forums about how to kill a thread–but this should be done only in development/testing and never in prod. And in dev/testing, a restart is usually the better idea (in case of a runaway thread).
#Integration-Server-and-ESB#Flow-and-Java-services#webMethods