Sporadic fail in JDWPTests.testCapabilities

[trancexpress]

Seen in this build: https://download.eclipse.org/eclipse/downloads/drops4/I20260227-1600/reports.html#tests

https://download.eclipse.org/eclipse/downloads/drops4/I20260227-1600/testresults/html/org.eclipse.jdt.debug.tests_ep440I-unit-linux-x86_64-java25_linux.gtk.x86_64_25.html

org.eclipse.jdt.debug.tests.core.JDWPTests	testCapabilities	Error	Cannot connect to VM

org.eclipse.core.runtime.CoreException: Cannot connect to VM
at org.eclipse.jdt.launching.AbstractVMRunner.abort(AbstractVMRunner.java:56)
at org.eclipse.jdt.internal.launching.StandardVMDebugger.run(StandardVMDebugger.java:457)
at org.eclipse.jdt.launching.JavaLaunchDelegate.launch(JavaLaunchDelegate.java:176)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:778)
at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1434)
at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1414)
at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchToLineBreakpoint(AbstractDebugTest.java:1702)
at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchToLineBreakpoint(AbstractDebugTest.java:1685)
at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchToLineBreakpoint(AbstractDebugTest.java:1669)
at org.eclipse.jdt.debug.tests.core.JDWPTests.testCapabilities(JDWPTests.java:54)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at junit.framework.TestCase.runTest(TestCase.java:177)
at junit.framework.TestCase.runBare(TestCase.java:142)
at org.eclipse.jdt.debug.tests.AbstractDebugTest.runBare(AbstractDebugTest.java:2927)
at junit.framework.TestResult$1.protect(TestResult.java:122)
at junit.framework.TestResult.runProtected(TestResult.java:142)
at junit.framework.TestResult.run(TestResult.java:125)
at junit.framework.TestCase.run(TestCase.java:130)
at junit.framework.TestSuite.runTest(TestSuite.java:241)
at junit.framework.TestSuite.run(TestSuite.java:236)
at junit.framework.TestSuite.runTest(TestSuite.java:241)
at org.eclipse.jdt.debug.tests.DebugSuite$1.run(DebugSuite.java:61)
at java.base/java.lang.Thread.run(Thread.java:1474)
Caused by: com.sun.jdi.connect.TransportTimeoutException
at org.eclipse.jdi.internal.connect.SocketTransportService.accept(SocketTransportService.java:93)
at org.eclipse.jdi.internal.connect.SocketTransportImpl.accept(SocketTransportImpl.java:63)
at org.eclipse.jdi.internal.connect.SocketListeningConnectorImpl.accept(SocketListeningConnectorImpl.java:167)
at org.eclipse.jdt.internal.launching.StandardVMDebugger$ConnectRunnable.run(StandardVMDebugger.java:113)
... 1 more
Caused by: java.net.SocketTimeoutException: Accept timed out
at java.base/sun.nio.ch.NioSocketImpl.timedAccept(NioSocketImpl.java:704)
at java.base/sun.nio.ch.NioSocketImpl.accept(NioSocketImpl.java:748)
at java.base/java.net.ServerSocket.implAccept(ServerSocket.java:593)
at java.base/java.net.ServerSocket.platformImplAccept(ServerSocket.java:560)
at java.base/java.net.ServerSocket.implAccept(ServerSocket.java:536)
at java.base/java.net.ServerSocket.implAccept(ServerSocket.java:482)
at java.base/java.net.ServerSocket.accept(ServerSocket.java:441)
at org.eclipse.jdi.internal.connect.SocketTransportService.accept(SocketTransportService.java:91)
... 4 more 

Workspace log file: https://download.eclipse.org/eclipse/downloads/drops4/I20260227-1600/testresults/ep440I-unit-linux-x86_64-java25_linux.gtk.x86_64_25/org.eclipse.jdt.debug.tests.AutomatedSuite.txt

21:21:30.292 SETUP JDWPTests.testCapabilities
21:21:53.211 TDOWN JDWPTests.testCapabilities

[trancexpress]

@HannesWell are the screenshots mentioned in the output uploaded somewhere accessible?

     [java] INFO: timeoutScreenOutputDir: /home/jenkins/agent/workspace/AutomatedTests/ep440I-unit-linux-x86_64-java25/workarea/I20260227-1600/eclipse-testing/results/ep440I-unit-linux-x86_64-java25_linux.gtk.x86_64_25/timeoutScreens
     [java] INFO: timeout: 7200000

Never mind I think I found the directory:

https://download.eclipse.org/eclipse/downloads/drops4/I20260227-1600/testresults/ep440I-unit-linux-x86_64-java25_linux.gtk.x86_64_25/timeoutScreens/

[trancexpress]

I'm not sure if this will help understand the problem: #887

We will need more logging, I have no idea what went wrong here.

[HannesWell]

@HannesWell are the screenshots mentioned in the output uploaded somewhere accessible?

Even though you found the screenshots for I-buildsI want to mention that you can archive build artifacts in Jenkins (verification) builds too.
I haven't checked the current set-ups of JDTs Jenkins pipeline but can help if you need assistance for that.

[trancexpress]

Maybe also something to do with https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/7207...