當我們運行一個項目的時候，一般都是在本地進行debug。但是如果是一個分布式的微服務，這時候我們選擇遠程debug是我們開發的利器。

環境

apache-tomcat-8.5.16

Linux

如何啟用遠程調試

tomcat開啟遠程調試

方法

切換到你的tomcat的bin目錄/apache-tomcat-8.5.16/bin
下，執行:

./catalina.sh jpda start 

執行上面的命令就可以開啟遠程debug了，如果想配置一些信息，比如端口號什么的，請參考下面的說明。

參數說明

#  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

操作說明

所以如果想修改配置，則如下操作：

在catalina.sh中進行配置：

JPDA_TRANSPORT=dt_socket JPDA_ADDRESS=5005 JPAD_SUSPEND=n 

或者通過JPDA_OPTS進行配置：

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

springboot開啟遠程調試

遠程調試maven設置

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 命令開啟遠程調試

在執行jar的時候，添加上參數。如下：

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