IntelliJ remote debugger connects, but breakpoints are not working

java debugging intellij-idea sbt scalatra

14,719

Solution 1

This is what I use for remote debugging:

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

The value you use above in your answer, -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005, is used in the For JDK 1.4.x field.

Solution 2

Ah finally, After big struggle ! I found it for me !

I needed to disable forking in build.sbt

 fork in Test := false,

It makes total sense, as it's only the first JVM who would get to be attach to the IDE.

I hope it help someone !

14,719

Author by

Joaquim d'Souza

Updated on June 17, 2022

Comments

Joaquim d'Souza almost 2 years
I am trying out the Scala web framework Scalatra. According to the docs here, the steps to enable IntelliJ debugging are:
1. Add the usual JDK options for remote debugging: "-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005"
2. Create a "Remote" run configuration in Intellij
3. Start up sbt, run jetty:start, and then start the remote debugger
When I do this, SBT prints out:

Listening for transport dt_socket at address: 5005

And IntelliJ prints:

Connected to the target VM, address: 'localhost:5005', transport: 'socket'

However, breakpoints do not seem to be working. When I hit the following endpoint, with a breakpoint at the *:
```
class AppServlet extends AppStack {
  get("/break-test") {
*   val response = "DONE"
    response
  }
}
```
The code does not stop at that line, but continues so I get the response DONE back.

I am using Java 1.8.0_111, Scala 2.12, and SBT 0.13.15.
Joaquim d'Souza almost 7 years

Ah OK, I saw somewhere else that jetty runs on the same JVM as SBT but will give this a go
brunovianarezende almost 7 years

I had to use xsbt-web-plugin 3.0 for this to work, this is the code in plugin.sbt: addSbtPlugin("com.earldouglas" %% "xsbt-web-plugin" % "3.0.0")
Joaquim d'Souza almost 7 years

This made a lot of sense, but did not work. I have: addSbtPlugin("com.earldouglas" %% "xsbt-web-plugin" % "3.0.1") And then > set debugPort in Jetty := 5005 > jetty:debug Which prints out: > Listening for transport dt_socket at address: 5005 And I run Debug from IntelliJ to get: Connected to the target VM, address: 'localhost:5005', transport: 'socket' But still no luck with the breakpoints :-(
Joaquim d'Souza almost 7 years

OK so my IntelliJ is out of date by ~1 year so let me update this!
brunovianarezende almost 7 years

also, this is what I use in intellij for remote debugging: -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,addres‌s=5005. What you show above is used in the For JDK 1.4.x
Joaquim d'Souza almost 7 years

That worked! Can you add that as an answer so I can accept it? I didn't need to use xsbt-web-plugin or set debugPort in Jetty := 5005
brunovianarezende almost 7 years

but, did you need to use jetty:debug?