Java errors Post: 302109772

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Operating Systems Solaris Java errors Post 302109772 by skolaskar on Thursday 8th of March 2007 02:01:33 AM

03-08-2007

Registered User

One DTrace agent library is called the "dvmti" agent. This can be run inside the Java Virtual Machine (JVM) to provide DTrace probes that are specific to the JVM and the Java platform. This agent is available for download from the Java.net project solaris10-dtrace-vm-agents. The dvmti agent uses the Java Virtual Machine Tool Interface (JVM TI). Specifically, the agent library utilizes the JVM TI interface to request various VM events and provide DTrace probes in the callback code for those events. To use these DTrace probes for the JVM and Java code, the Java application has to be started as shown here:
java -Xrundvmti[ Smilie

ptions] <MainClass>

Where options are:

all same as: unloads,allocs,stats,methods
help print help message
unloads track class unloads
allocs track object allocations and frees
stats generate heap stats after each GC
methods generate method entry exit events
exclude=name exclude class names

default is none of unloads, allocs, stats, or methods.
The dvmti agent will utilize byte code instrumentation (BCI) where needed and will need a jar file called dvmti.jar, which should be located in the same directory as the shared library libdvmti.so. The JDK 5.0 release has an environment variable that can be used to include options in the startup of any Java application:
export JAVA_TOOL_OPTIONS="-Xrundvmti:all"

You could also try jstat & jstatd to check the operations..

skolaskar

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javaws

javaws(1)						      General Commands Manual							 javaws(1)

NAME

       javaws - Java Web Start launcher command

SYNOPSIS

       javaws [ options ] [ URL ]

PARAMETERS

       options	      Command-line options.  Options many be in any order. For a discussion of the various options, see OPTIONS below.

       URL	      Uniform Resource Locator (URL) of the JNLP (Java Network Launching Protocol) file.

DESCRIPTION

       The  javaws command launches Java Web Start, which is the reference implementation of the Java Network Launching Protocol (JNLP).  Java Web
       Start launches java application/applets hosted on a network.

       Without any options javaws will launch the Java JNLP Application Manager, from which users can launch applications/applet or configure Java
       Web Start.

       If a URL for a JNLP file is specified, javaws will launch the Java application/applet specified in the JNLP file.

OPTIONS

       The  javaws  launcher  has  a  set  of  options that are supported in the current release.  However, the options may be removed in a future
       release.  All -X options are non-standard and subject to change.

       -offline
	      Runs Java Web Start in offline mode.

       -uninstall URL
	      Removes a specific application/applet from the user's cache, as indicated by the URL for the JNLP file. Java  Web  Start	will  exit
	      after the command has completed.

       -updateVersions
	      Updates  the Java Web Start configuration file based on the current machine's settings. Java Web Start will exit when the command is
	      completed.

       -Xclearcache
	      Clears the user's cache.	Java Web Start will exit after the command has completed.

       -Xnosplash
	      Disables the display of the initial splash screen.

       -import
	      Imports the application specified by the URL into the user's cache but does not run it..

       -silent
	      When used with the -import option, imports in silent mode; i.e., there will be no UI pop up. The process exit code will be either  0
	      if successful or 1 if not.

       -codebase URL
	      Replaces the codebase with URL in the jnlp file specified when importing the resources. URL must be a valid URL.

       -system
	      Uses the system cache instead of the user cache.

       -shortcut
	      Allows the creation of shortcuts during silent import.

       -association
	      Allows the creation of associations during silent import.

       -open arguments
	      If specified, replaces the arguments in the jnlp file with -open arguments.

       -print arguments
	      If specified, replaces the arguments in the jnlp file with -print arguments.

       -online
	      Runs in online mode (default behavior).

       -viewer
	      Runs the Java Application Cache Viewer (default if no URL is specified).

       -userConfig property-name
	      Clears the specified deployment property.

       -userConfig property-name property-value
	      Sets the specified deployment property to the specified value.

       -wait  If specified, the javaws process will not exit until the application exits.

FILES

       For more information about the user and system cache and deployment.properties files, see http://java.sun.com/j2se/1.5.0/docs/guide/deploy-
       ment/deployment-guide/properties.html

MORE INFORMATION

       For more information about Java Web Start, see http://java.sun.com/j2se/1.5.0/docs/guide/javaws/index.html.

								   09 April 2004							 javaws(1)

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javaws