Can i start deifferent debug session in one jdt.ls

[EricCD-S]

Now if i want to debug different code , i have to start a new jdt.js process to start a debug session. Can i start different debug session in one jdt.ls process to debug different code? i send several start debug session requests to jdt.ls but get the same port number.

[github-actions]

Hi @EricCD-S, I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

It isn’t currently possible to host more than one distinct debug session in a single jdt.ls process—every startDebugging call will reuse the same JDWP port. You have two options:

• Spawn a separate jdt.ls process per session. Each instance will pick (or be configured with) its own debug port.
• Switch to “attach” mode and configure multiple debug configurations in your launch.json, each using a different port; then start each JVM with its own -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=<port>.

References:

• One jdt.ls instance to handle multiple clients (discusses multiplexing LSP workloads; debug support is similarly single-session per process)
eclipse-jdtls/eclipse.jdt.ls#741

Other references with low confidence

• Debug multiple applications running in a single Weblogic server (asks about multiple debug sessions in VS Code; suggests using separate ports/workspaces)
microsoft/vscode-java-debug#1345

• Run debug with a single command/click (talks about managing JDWP options in Gradle tasks, not about jdt.ls session multiplexing)
microsoft/vscode-gradle#244 (comment)

The team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!