How to Remotely Debug a Java Virtual Machine (JVM)?

Remote Debugging Options for Java Virtual Machine (JVM)

When troubleshooting Java applications, it can be beneficial to remotely debug the JVM. To enable remote debugging, specific command line options must be configured.

Before Java 5.0

In Java versions prior to 5.0, two options were used:

• -Xdebug: Enables the debug mode.
• -Xrunjdwp: Launches the Java Debug Wire Protocol (JDWP) server.

From Java 5.0

From Java 5.0 onward, it's recommended to use the -agentlib:jdwp option instead. This option combines both previous options and offers more control. Its syntax is as follows:

-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=1044

Here are the options explained in detail:

• transport=dt_socket: Specifies the transport method for connecting to the JVM. Socket is a reliable choice, enabling remote debugging.
• address=8000: Sets the TCP/IP port on which the debugger should connect. Local connections are allowed by default.
• suspend=y: If set to 'y', the JVM will wait for the debugger to attach before executing the program. Setting this to 'n' will start execution immediately.

The above is the detailed content of How to Remotely Debug a Java Virtual Machine (JVM)?. For more information, please follow other related articles on the PHP Chinese website!