Hi, I just thought I'd mention this here as it appears to be undocumented and might help someone else. If you want to enable JDWP tracing, do something like this (path names are for Mac):
$ cd /Applications/Eclipse.app/Contents/Eclipse/plugins/org.eclipse.jdt.debug_3.10.1.v20160811-0441
$ echo -e "User.verbose=true\nVerbose.out=/tmp/eclipse.verbose.out" > jdi.ini
$ jar uvf jdimodel.jar jdi.ini
and then in /tmp/eclipse.verbose.out you will see (e.g.)
Sending command (VIRTUAL_MACHINE - VERSION)
length 00 00 00 0b
id 00 00 00 01
flags 00 <none>
command set 01
command 01
Received reply
length 00 00 00 f2
id 00 00 00 01
flags 80 REPLY_PACKET
error code 00 00 NONE
version descr. <string> Java Debug Wire Protocol (Reference Implementation) version 1.8
JVM Debug Interface version 1.2
JVM version 1.8.0-internal (OpenJDK 64-Bit Server VM, compiled mode, sharing)
major version 00 00 00 01
minor version 00 00 00 08
version <string> 1.8.0-internal
name <string> OpenJDK 64-Bit Server VM
If there's an easier way of enabling this please let me know (e.g. a more convenient classpath location).
Cheers,
David
