error: RPC request GetDebugAdapterBinary failed: Failed to find a debug adapter

[zuoshoulan]

Relevance Confirmation

• I confirmed that this is not an issue with the Eclipse JDT Language Server itself

What happened?

desc

what I doing
I just want to try debug a demo springboot project, so first,I do "debugger: start", but it failed.

error msg

error: RPC request GetDebugAdapterBinary failed: Failed to find a debug adapter

how it fix

• I rollback the extension, the 'Java' Extension to v6.8.16, then it's ok, run successful and print "2026-05-20T21:27:14.780+08:00 INFO 11162 --- [ main] com.example.demo.DemoApplication : Started DemoApplication in 1.594 seconds (process running for 1.826)"
• and I try v6.8.17, v6.8.18, v6.8.19, all failed.

only three files

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
         https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.4.2</version>
        <relativePath/>
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <properties>
        <java.version>21</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

DemoApplication

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

TestController

package com.example.demo;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

    @GetMapping("/test")
    public String test() {
        return "hello,world";
    }
}

What did you expect to happen?

I expected it run start successful.

Environment

Zed: 1.3.5 and 1.2.7 both
Platform: windows11, wsl ubuntu 24.04
Java: JDK: openjdk version "25.0.2" 2026-01-20

[zuoshoulan]

sometimes,it also failed.

[mavallad]

I experience the same problem when I try to debug the java application using Windows 11 with WSL.
Same version of WSL with Ubuntu 24.04 and Java 25