[TEST] LongClassPathTests failure on Windows

[SougandhS]

See https://download.eclipse.org/eclipse/downloads/drops4/I20260210-1800/testresults/html/org.eclipse.jdt.debug.tests_ep439I-unit-win32-x86_64-java21_win32.win32.x86_64_21.html

TestSuite with 2 tests [example: testVeryLongClasspathWithClasspathOnlyJar(org.eclipse.jdt.debug.tests.launching.LongClassPathTests)]	testVeryLongClasspathWithArgumentFile	Error	Program did not suspend, launch terminated.org.eclipse.jdt.debug.tests.AbstractDebugTest$TestAgainException: Program did not suspend, launch terminated.at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1453)at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1403)at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1385)at org.eclipse.jdt.debug.tests.launching.LongClassPathTests.launchAndSuspend(LongClassPathTests.java:280)at org.eclipse.jdt.debug.tests.launching.LongClassPathTests.testVeryLongClasspathWithArgumentFile(LongClassPathTests.java:156)at java.base/java.lang.reflect.Method.invoke(Method.java:580)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:2929)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$1.run(DebugSuite.java:61)at java.base/java.lang.Thread.run(Thread.java:1583)	504.598
TestSuite with 2 tests [example: testVeryLongClasspathWithClasspathOnlyJar(org.eclipse.jdt.debug.tests.launching.LongClassPathTests)]	testVeryLongClasspathWithClasspathOnlyJar	Error	Program did not suspend, launch terminated.org.eclipse.jdt.debug.tests.AbstractDebugTest$TestAgainException: Program did not suspend, launch terminated.at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1453)at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1403)at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1385)at org.eclipse.jdt.debug.tests.launching.LongClassPathTests.launchAndSuspend(LongClassPathTests.java:280)at org.eclipse.jdt.debug.tests.launching.LongClassPathTests.testVeryLongClasspathWithClasspathOnlyJar(LongClassPathTests.java:119)at java.base/java.lang.reflect.Method.invoke(Method.java:580)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:2929)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:1583)

[trancexpress]

Its probably this in the workspace log:

https://download.eclipse.org/eclipse/downloads/drops4/I20260225-1800/testresults/ep439I-unit-win32-x86_64-java21_win32.win32.x86_64_21/org.eclipse.jdt.debug.tests.AutomatedSuite.txt

Console output follows:
Error: LinkageError occurred while loading main class test.classpath.Main
	java.lang.UnsupportedClassVersionError: test/classpath/Main has been compiled by a more recent version of the Java Runtime (class file version 65.0), this version of the Java Runtime only recognizes class file versions up to 61.0

!ENTRY org.eclipse.jdt.debug.ui.tests 4 0 2026-02-26 01:37:28.790
!MESSAGE Test case: testVeryLongClasspathWithClasspathOnlyJar
Never received event: Suspend
Process exit value: 1
Console output follows:
Error: LinkageError occurred while loading main class test.classpath.Main
	java.lang.UnsupportedClassVersionError: test/classpath/Main has been compiled by a more recent version of the Java Runtime (class file version 65.0), this version of the Java Runtime only recognizes class file versions up to 61.0


01:37:30.349 TDOWN LongClassPathTests.testVeryLongClasspathWithClasspathOnlyJar

!ENTRY org.eclipse.jdt.debug.tests 4 0 2026-02-26 01:37:30.821
!MESSAGE [testVeryLongClasspathWithClasspathOnlyJar] Test failed attempt 1. Re-testing.
!STACK 0
org.eclipse.jdt.debug.tests.AbstractDebugTest$TestAgainException: Program did not suspend, launch terminated.
	at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1463)
	at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1413)
	at org.eclipse.jdt.debug.tests.AbstractDebugTest.launchAndWait(AbstractDebugTest.java:1395)
	at org.eclipse.jdt.debug.tests.launching.LongClassPathTests.launchAndSuspend(LongClassPathTests.java:280)
	at org.eclipse.jdt.debug.tests.launching.LongClassPathTests.testVeryLongClasspathWithClasspathOnlyJar(LongClassPathTests.java:119)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	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:2926)
	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:1583)
01:37:30.997 SETUP LongClassPathTests.testVeryLongClasspathWithClasspathOnlyJar

This looks similar to #782:

javaProject = createJavaProjectClone("testVeryLongClasspathWithArgumentFile", CLASSPATH_PROJECT_CONTENT_PATH.toString(), JavaProjectHelper.JAVA_SE_9_EE_NAME, true);

Again we want Java 9 for the project but something else is sometimes chosen instead. The snippet runs on Java 17 but compiles to class version Java 21... Maybe we can use --release 11 or similar for the test project. Or apply a similar fix as for #782: #866

[iloveeclipse]

For me there is no errors logged, the test testVeryLongClasspathWithArgumentFile simply hangs. I plan to look at the hang root cause. The other test runs fine after switching project to 21, which should be OK for that test.

[trancexpress]

The other test runs fine after switching project to 21, which should be OK for that test.

Do you have Java 25 installed and default? It might not pass with that.

[iloveeclipse]

Yes, Java 25 is installed and default, the tests itself run on Java 21.

!ENTRY org.eclipse.jdt.debug 1 0 2026-02-26 11:56:59.099
!MESSAGE VM added jdk-21.0.9, location: C:\Program Files\Java\jdk-21.0.9

!ENTRY org.eclipse.jdt.debug 1 0 2026-02-26 11:56:59.508
!MESSAGE VM added jdk-17.0.16, location: C:\Program Files\Java\jdk-17.0.16

!ENTRY org.eclipse.jdt.debug 1 0 2026-02-26 11:56:59.509
!MESSAGE VM added jdk-25, location: C:\Program Files\Java\jdk-25

!ENTRY org.eclipse.jdt.debug 1 0 2026-02-26 11:56:59.510
!MESSAGE VM added jdk-11.0.30+7, location: C:\Program Files\Java\jdk-11.0.30+7

!ENTRY org.eclipse.jdt.debug 1 0 2026-02-26 11:56:59.514
!MESSAGE VM added jdk8u482-b08, location: C:\Program Files\Java\jdk8u482-b08

!ENTRY org.eclipse.jdt.debug 1 0 2026-02-26 11:56:59.515
!MESSAGE VM added jdk-25.0.1, location: C:\Program Files\Java\jdk-25.0.1

BTW, the test testVeryLongClasspathWithClasspathOnlyJar needs 60 seconds !!! to finisch on my notebook with 8 cores Intel Core Ultra 7.

[trancexpress]

For me there is no errors logged, the test testVeryLongClasspathWithArgumentFile simply hangs.

If I do this change:

@@ -289,7 +289,7 @@ public class LongClassPathTests extends AbstractDebugTest {
        protected IJavaThread launchAndSuspend(ILaunchConfiguration config) throws Exception {
                DebugEventWaiter waiter = new DebugElementKindEventWaiter(DebugEvent.SUSPEND, IJavaThread.class);
                waiter.setTimeout(DEFAULT_TIMEOUT * 2);
-               waiter.setEnableUIEventLoopProcessing(enableUIEventLoopProcessingInWaiter());
+               waiter.setEnableUIEventLoopProcessing(true);
                Object suspendee = launchAndWait(config, waiter);
                return (IJavaThread) suspendee;
        }

I see in the Console view of the started Eclipse:

Error: LinkageError occurred while loading main class test.classpath.Main
	java.lang.UnsupportedClassVersionError: test/classpath/Main has been compiled by a more recent version of the Java Runtime (class file version 65.0), this version of the Java Runtime only recognizes class file versions up to 55.0

The same is also printed in the log:

Never received event: Suspend
Process exit value: 1
Console output follows:
Error: LinkageError occurred while loading main class test.classpath.Main
	java.lang.UnsupportedClassVersionError: test/classpath/Main has been compiled by a more recent version of the Java Runtime (class file version 65.0), this version of the Java Runtime only recognizes class file versions up to 55.0


14:37:35.335 TDOWN LongClassPathTests.testVeryLongClasspathWithClasspathOnlyJar

Without the change I don't see the console and I don't see the error in the log...:

Never received event: Suspend
Process exit value: 1
Console output follows:


14:35:27.395 TDOWN LongClassPathTests.testVeryLongClasspathWithClasspathOnlyJar

I'm not sure why the test doesn't allow processing of UI events, or why we would see something else in a CI environment, compared to running the test locally...

[trancexpress]

BTW, the test testVeryLongClasspathWithClasspathOnlyJar needs 60 seconds !!! to finisch on my notebook with 8 cores Intel Core Ultra 7.

On my Linux Laptop (AMD Ryzen Pro 5) its 30 seconds. Maybe its the slow I/O on Windows.