I am also facing the same issue when i try to run AEM in debug mode using the below parameters:
java -XX:MaxPermSize=256m -Xmx1024M -agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n -jar aem-6.5-p4502.jar.jar
Note: While running in normal mode , we dont see any such issues.