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I found a thread from last October that seemed relevant. I'm running SuSE 9.1 (which seems to be part of the problem). Tomcat is running at 11555, and I can telnet to it and it responds to JDWP-Handshake, but the debugger console registers "Attaching to localhost:11555 Connection refused" Anyone have a clue now that 4 months have elapsed?
It works anywhere, on any other Linux distro - the only problem is suse 9.1. I would recommend to try to map localhost correctly to 127.0.0.1 as a workaround.
Does it help?
Verified ... and Closing all issues resolved into NetBeans 6.7 and earlier.