What are Java command line options to set to allow

问题:

I know there\'s some JAVA_OPTS to set to remotely debug a Java program.

What are they and what do they mean ?

回答1:

I have this article bookmarked on setting this up for Java 5 and below.

Basically run it with:

-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=1044

For Java 5 and above, run it with:

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

回答2:

Before Java 5.0, use -Xdebug and -Xrunjdwp arguments. These options will still work in later versions, but it will run in interpreted mode instead of JIT, which will be slower.

From Java 5.0, it is better to use the -agentlib:jdwp single option:

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

Options on -Xrunjdwp or agentlib:jdwp arguments are :

• transport=dt_socket : means the way used to connect to JVM (socket is a good choice, it can be used to debug a distant computer)
• address=8000 : TCP/IP port exposed, to connect from the debugger,
• suspend=y : if \'y\', tell the JVM to wait until debugger is attached to begin execution, otherwise (if \'n\'), starts execution right away.

回答3:

Since Java 9.0 JDWP supports only local connections by default. http://www.oracle.com/technetwork/java/javase/9-notes-3745703.html#JDK-8041435

For remote debugging one should run program with *: in address:

-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:8000

回答4:

For java 1.5 or greater:

java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 <YourAppName>

For java 1.4:

java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005 <YourAppName>

For java 1.3:

java -Xnoagent -Djava.compiler=NONE -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005 <YourAppName>

Here is output from a simple program:

java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=1044 HelloWhirled
Listening for transport dt_socket at address: 1044
Hello whirled

回答5:

There\'s a lot of environment problems if you are using Maven. So, if you start your program from maven, just run the mvnDebug command in place of mvn and attach a debugger on port 8000. It you take care of all the environment problems.

回答6:

java

java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=8001,suspend=y -jar target/cxf-boot-simple-0.0.1-SNAPSHOT.jar

address specifies the port at which it will allow to debug

Maven

Debug Spring Boot app with Maven: mvn spring-boot:run -Drun.jvmArguments=\"-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8001\"