Idea remote breakpoint debugging jar package project

Preface

springboot The project is being developed , Make it one jar package , Put it into the server runtime , If the report is wrong , How to check is more convenient ？

If the development environment , We can do it in IDEA Set a breakpoint , Easy debugging , But now it's already a jar The package is running on the server .

We can debug remote breakpoints jar Package the project ？

Sure .

---

One 、 preparation

1. jar Package application

Create your own springboot project , It's very simple , Just write an interface for debugging ：

@GetMapping("/test")
public String test(){
    
    int i = 1 / 0;
    System.out.println(i);
    return "success";
}

become involved jar package , Upload to a virtual machine node , I uploaded it here to 192.168.201.4

1. IDEA To configure

Click on Edit Configurations

choice Remote

Fill in information
Be careful ： We just need to modify it Host That one is ok , Instead, we run it remotely jar The node of the package ip

Two 、 Breakpoint debugging

1. function jar package

In the previous step , IDEA Automatically generates a string of things , This is this. ：

Copy it ！

Go to the virtual machine node , Run the command to start the project ：

java  Copied instructions  -jar  Package name 

I actually run the command ：

java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 -jar demo.jar

The console can see , It's listening 5005 port

2. Access interface

http://192.168.201.4:8087/test

3. Incoming breakpoint

3、 ... and 、 Be careful

I deliberately let the program throw exceptions here , And print the information , You can see , It's a little different from our local breakpoint ,IDEA The console will not output information , We can only view it on the console of the virtual machine node

IDEA The console of always shows ：

But stack information , Running object properties, etc , It can still be done in IDEA What I saw there

also , Running jar Package code and IDEA The code in should be consistent

---

summary

Welcome to point out my mistake ！