Remote Debugging of Java Applications: Java Command Line Options
While debugging Java programs locally is straightforward, remote debugging requires specific configurations. To enable remote debugging, several command line options can be employed.
Options for Java Versions Prior to 5.0
- -Xdebug: Activates the Java Debug Wire Protocol (JDWP) and enables debugging.
- -Xrunjdwp: Configures the JDWP agent to listen for debug connections.
Options for Java 5.0 and Later
- -agentlib:jdwp: Combines the functionality of -Xdebug and -Xrunjdwp in a single option.
-agentlib:jdwp Options
The -agentlib:jdwp option includes various sub-options to control the debugging behavior:
- transport=dt_socket: Specifies the use of the Socket Transport Protocol (STP) for communication.
- address=port: The TCP/IP port on which the JVM will listen for debug connections.
- suspend=y/n: Controls whether the JVM waits for a debugger to attach before executing the program (y for suspend, n for immediate execution).
Example for Remote Debugging
The following command enables remote debugging over a network with an address of 10.0.0.1 and port 8000:
java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=10.0.0.1:8000 ...
Using these options, developers can remotely debug Java programs for efficient troubleshooting and code analysis.
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