CODEWITHSUNDEEP
javajboss
dirtside
dirtside

Reputation: 8280

Undocumented Java command line options?

On a server where I work is a JBoss instance, which has the following command line:

/usr/java/jdk1.6.0_31/bin/java -Dcom.sun.management.jmxremote -Dprogram.name=run.sh -server -Xms464m -Xmx464m -XX:MaxPermSize=128m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Dsun.net.inetaddr.ttl=0 -Dcom.sun.management.jmxremote -Djavax.management.builder.initial=org.jboss.system.server.jmx.MBeanServerBuilderImpl -Djboss.platform.mbeanserver -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=20071 -Djava.endorsed.dirs=/opt/jboss/lib/endorsed -classpath /opt/jboss/bin/run.jar:/usr/java/jdk1.6.0_31/lib/tools.jar org.jboss.Main -P /opt/jboss/server/default/site-deploy/example.com/boot-1.properties -c default

I have a few questions:

1. I understand that the -D option sets the named property, e.g. -Dsun.rmi.dgc.server.gcInterval=3600000 sets the property sun.rmi.dgc.server.gcInterval to the value 3600000. What about -D options that have no equals sign, like -Dcom.sun.management.jmxremote? What is the value of com.sun.management.jmxremote?

2. I can't find ANY documentation explaining what the -P or -c options do. Neither java -version or man java mentions them. My guess is that -P means "load the properties from the specified file." I have no idea what -c does.

3. The token org.jboss.Main doesn't seem to be part of the preceding -classpath option. Is it the name of the class that Java is telling it to invoke, e.g. how java Foo would invoke a class called Foo?

Upvotes: 1

Views: 549

Answers (2)

DavidPostill
DavidPostill

Reputation: 7921

The following link documents all of the options to the jboss run.sh script:

Chapter 5. Starting and Stopping JBoss

usage: run.sh [options]
  -h, --help                  Show this help message
  -V, --version               Show version information
  --                          Stop processing options
  -D<name>[=<value>]          Set a system property
  -d, --bootdir=<dir>         Set the boot patch directory; Must be absolute or url
  -p, --patchdir=<dir>        Set the patch directory; Must be absolute or url
  -n, --netboot=<url>         Boot from net with the given url as base
  -c, --configuration=<name>  Set the server configuration name
  -B, --bootlib=<filename>    Add an extra library to the front bootclasspath
  -L, --library=<filename>    Add an extra library to the loaders classpath
  -C, --classpath=<url>       Add an extra url to the loaders classpath
  -P, --properties=<url>      Load system properties from the given url
  -b, --host=<host or ip>     Bind address for all JBoss services
  -g, --partition=<name>      HA Partition name (default=DefaultDomain)
  -u, --udp=<ip>              UDP multicast address
  -l, --log=<log4j|jdk>       Specify the logger plugin type

Upvotes: 0

Jigar Joshi
Jigar Joshi

Reputation: 240928

/usr/java/jdk1.6.0_31/bin/java -Dcom.sun.management.jmxremote -Dprogram.name=run.sh -server -Xms464m -Xmx464m -XX:MaxPermSize=128m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Dsun.net.inetaddr.ttl=0 -Dcom.sun.management.jmxremote -Djavax.management.builder.initial=org.jboss.system.server.jmx.MBeanServerBuilderImpl -Djboss.platform.mbeanserver -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=20071 -Djava.endorsed.dirs=/opt/jboss/lib/endorsed -classpath /opt/jboss/bin/run.jar:/usr/java/jdk1.6.0_31/lib/tools.jar org.jboss.Main -P /opt/jboss/server/default/site-deploy/example.com/boot-1.properties -c default

1 System property without value means that system property is present, and value is empty string ""

2 those are the command line argument to jboss's Main class

3 that class is coming from one of those jar, open run.jar and validate

Upvotes: 1

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