Re: [jboss-as7-dev] Changed arguments…can we do better ? :P
Someone just mentioned that Max posted this question regarding AS7
startup:
> Going over the AS7.1 server and how startup arguments has changed we
> noticed besides the -logmodule not being needed the following two was
> added:
>
> -Djboss.modules.system.pkgs=org.jboss.byteman
> -Djava.awt.headless=true
> . . .
> Any reason why byte man gets added and not the others ?
Yes. If you don't add this at startup then the module loader will hide
all the Byteman classes from all JBoss classloaders. This means that you
cannot decide to install a Byteman agent after AS startup in order to
debug/trace behaviour in a broken App Server. It just won't work (TM).
That's going to give our support team (not to mention our developers who
need to use Byteman for testing) a major headache.
Yes, I know - same problem for those wanting to use jprofiler, yourkit, eclemma, and
others.
Of course, we could always advise all AS7 users to configure this
setting in their own startup and leave it undefined by default but in
practice that's just going to be a FAIL. David Lloyd and I discussed
this some months back (July 11?) and having checked that adding this to
the startup had *negligible* overhead it was added as a default.
Yes, I just suggest we make this list include more than just byteman and
take it *off* the commandline into a setting.
Also, I think the idea of adding this via a properties file sounds
nice
at first but actually it is just splitting up the config by another
name. One file to rule them all . . .
The problem is there are not one file to rule them all.
There is one per OS and tools that need to launch cannot use the .bat/.sh files
since no way to portably and reliably kill the process.
/max
http://about.me/maxandersen