Getting 'ERROR: transport error 202: recv error: Connection reset by peer' while debugging

[tarekahf]

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Environment:

• VS Code Version: 1.73.1
• Extension Version: Language Support for Java(TM) by Red Hat v1.13.2022111603
• JDK Type & Version: Oracle jdk1.8.0_351 - 32bit
• OS Type & Version: Windows 10 Enterprise

Step to Reproduce:

• Open an existing multi-module maven project in VS Code and wait until it is fully loaded. This project is relatively huge.
• Setup launch.json with attach and launch for Java Project
• The launch config is working fine. Still, after a couple of minutes, I get ERROR: transport error 202: recv error: Connection reset by peer in the terminal, and the debugger is disconnected.
• The same happens with the attach config.
• I am able to debug successfully as long as the debugger is not disconnected.
• When debugging in the attach config, the debugger keeps on listening, and I can attach again, but it will disconnect after a couple of minutes.
• Even after the debugger is disconnected, the application is still active.
• The command used to start the debugger in attach mode is:

C:\apps\jdk1.8.0_271\bin\java.exe "-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=localhost:60082" '-Xincgc -Xms64m -Xmx950m' '-Dsun.security.ssl.allowUnsafeRenegotiation="true"' '-Djava.security.policy="policy.all"' '-Dpython.home=".."' '-Dcom.ibm.mq.cfg.useIBMCipherMappings="false"' '-Xbootclasspath/p:class1 class2 ...' '-cp' '.\classpath.jar' 'mainClassName'

Note: The command above to start the debugger is mostly provided as it is the same one used to launch the actual application.

Launch Config for attach:

        {
            "type": "java",
            "name": "Attach to java debug port 60082",
            "projectName": "sarora",
            "request": "attach",
            "hostName": "localhost",
            "port": "60082"
        }

Expected Behavior:

• The debugger should remain active and should not disconnect

Actual Behavior:

• The debugger is disconnecting after a couple of minutes.

Related Issues: I found this report to be similar: https://github.com/microsoft/vscode-java-debug/issues/164 and I followed the instructions to do the needed troubleshooting but it is not working.

[testforstephen]

Did you try a newer JDK (e.g. JDK 17) on this?

[tarekahf]

Did you try a newer JDK (e.g. JDK 17) on this?

I didn't as the project requires jdk 1.8.

[jcrben]

A coworker of mine is getting the same problem in a highly-secured corporate environment. Seems that it making a call out to the internet somewhere @testforstephen ?

But he's only getting it for a specific complex project and not a simple minimal one. I'm asking him to add things from the complex project to a simple one until it breaks.

@tarekahf fyi if you just need java 8 you can use jdk 11 as it's backwards compatible. My coworker is using jdk 11 and gets the same problem, didn't try jdk 17

[testforstephen]

Please try this command in the terminal to see if you can use the jdk debug tool:

jdb -connect com.sun.jdi.SocketAttach:hostname=localhost,port=<port>

[tarekahf]

@jcrben @testforstephen thank you for the reply. It's too late now, as I switched to Eclipse, and not facing such issues at all. I will try again using vscode (because it has other cool features not in eclipse) when I have the chance.

[jcrben]

@testforstephen mysteriously it started working for my coworker now. there may have been some firewall configuration behind the scenes that addressed it