Remotely debug idea, configure remote debug, and add JVM startup parameter -xdebug in the program of remote server

Preface

   stay The locally developed program runs on the server and reports an error And Lack of log information or even error logs when , Need to pass through Remote debugging To debug the program on the server

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1. idea To configure remote debug

1.1 In the server program , add to JVM Launch parameters

   stay Script to start the program in , namely java -jar command after , Add parameters that support remote debugging ( Default choice 5005 port , To avoid port conflicts , Other ports that are not commonly used can be selected )

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

Parameter meaning ：

-XDebug  Enable remote debugging 
-Xrunjdwp  load JDWP Of JPDA Refer to the execution example 
transport  Used in debugging programs and VM Communication between processes used 
dt_socket socket transmission 
server=y/n VM Does it need to be executed as a debugging server 
address=5005  The port number that the debugging server listens to 
suspend=y/n  Whether to start after debugging the client to establish a connection VM 

Such as ：

1.2 idea Connect to remote server , Remote debugging

   Click on Add Configuration Then choose Remote

   Set the remote server Ip And remote debugging port

   After adding breakpoints in local code , You can debug the code on the remote server

notes ：
   If the firewall between the remote server and the local is not opened , You cannot perform remote debugging , It can be done by telnet ip port Command test communication

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2. Remote debugging principle

  Java The program is unified in the form of bytecode JVM Run in , As long as the local code is the same as the class file on the remote server , Two JVM Communication through debug protocol , The local source code can be connected to the remote server JVM, Then perform remote debugging

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