Java项目开启远程调试的方法步骤(tomcat、springboot)

当我们运行一个项目的时候,一般都是在本地进行debug。但是如果是一个分布式的微服务,这时候我们选择远程debug是我们开发的利器。

环境

apache-tomcat-8.5.16

Linux

如何启用远程调试

tomcat开启远程调试

方法

切换到你的tomcat的bin目录/apache-tomcat-8.5.16/bin

下,执行:

./catalina.sh jpda start

执行上面的命令就可以开启远程debug了,如果想配置一些信息,比如端口号什么的,请参考下面的说明。

参数说明

# JPDA_TRANSPORT (Optional) JPDA transport used when the "jpda start"

# command is executed. The default is "dt_socket".

#

# JPDA_ADDRESS (Optional) Java runtime options used when the "jpda start"

# command is executed. The default is localhost:8000.

#

# JPDA_SUSPEND (Optional) Java runtime options used when the "jpda start"

# command is executed. Specifies whether JVM should suspend

# execution immediately after startup. Default is "n".

#

# JPDA_OPTS (Optional) Java runtime options used when the "jpda start"

# command is executed. If used, JPDA_TRANSPORT, JPDA_ADDRESS,

# and JPDA_SUSPEND are ignored. Thus, all required jpda

# options MUST be specified. The default is:

#

# -agentlib:jdwp=transport=$JPDA_TRANSPORT,

# address=$JPDA_ADDRESS,server=y,suspend=$JPDA_SUSPEND

操作说明

所以如果想修改配置,则如下操作:

在catalina.sh中进行配置:

JPDA_TRANSPORT=dt_socket

JPDA_ADDRESS=5005

JPAD_SUSPEND=n

或者通过JPDA_OPTS进行配置:

JPDA_OPTS='-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005'

springboot开启远程调试

远程调试maven设置

The run goal forks a process for the boot application. It is possible to specify jvm arguments to that forked process. The following configuration suspend the process until a debugger has joined on port 5005

<project>

...

<build>

...

<plugins>

...

<plugin>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

<version>1.1.12.RELEASE</version>

<configuration>

<jvmArguments>

-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005

</jvmArguments>

</configuration>

...

</plugin>

...

</plugins>

...

</build>

...

</project>

These arguments can be specified on the command line as well, make sure to wrap that properly, that is:

mvn spring-boot:run -Drun.jvmArguments="-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005"

jar 命令开启远程调试

在执行jar的时候,添加上参数。如下:

java -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=8000,suspend=n -jar demo.jar

如果想深入了解Java调试,那么去看一下这个吧。深入Java调试体系

问题

如果出现Connection refused。

首先检查一下端口8000的使用情况:

use:~/tomcat/logs # netstat -an|grep 8000

cp 0 0 127.0.0.1:8000 0.0.0.0:* LISTEN

可见当前16808端口服务被绑定了回环地址,外部无法访问。即本地调试。

办法:

修改catalina.sh中一个参数。

if [ -z "$JPDA_TRANSPORT" ]; then

JPDA_TRANSPORT="dt_socket"

fi

if [ -z "$JPDA_ADDRESS" ]; then

JPDA_ADDRESS="0.0.0.0:8000"

fi

if [ -z "$JPDA_SUSPEND" ]; then

JPDA_SUSPEND="n"

fi

对JPDA_ADDRESS="localhost:8000" 把默认值(localhost:8000)改成0.0.0.0:8000。默认是本地ip调试也就是无法远程调试,0.0.0.0表示所有ip地址都能调试。

远程连上后再看端口情况:

root@VM-198-217-ubuntu:/opt/apache-tomcat-8.5.16/bin# netstat -an | grep 8000

tcp 0 0 10.133.198.217:8000 60.177.99.27:49998 ESTABLISHED

断开后是这样的:

root@VM-198-217-ubuntu:/opt/apache-tomcat-8.5.16/bin# netstat -an | grep 8000

tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN

tcp 0 0 10.133.198.217:8000 60.177.99.27:49998 TIME_WAIT

idea连接远程端口进行远程debug

我已经在服务器上开启了远程调试,idea连接的步骤,直接上图。

edit configurations

远程调试配置

参数配置

将红框内的地址和端口号改成自己的。

启动远程调试

成功界面

请求一下试试

调试的姿势和本地调试一样,开始造起来吧!

以上是 Java项目开启远程调试的方法步骤(tomcat、springboot) 的全部内容, 来源链接: utcz.com/z/362034.html

回到顶部