[TEMP] Move pde.ui.tests to Java-21 to investigate I-build test failures

[HannesWell]

Currently there are nine test failures in org.eclipse.pde.ui.tests on Linux with Java-21 and 23:

• https://download.eclipse.org/eclipse/downloads/drops4/I20241109-1800/testresults/html/org.eclipse.pde.ui.tests_ep434I-unit-linux-x86_64-java21_linux.gtk.x86_64_21.html
• https://download.eclipse.org/eclipse/downloads/drops4/I20241109-1800/testresults/html/org.eclipse.pde.ui.tests_ep434I-unit-linux-x86_64-java23_linux.gtk.x86_64_23.html

This is an attempt to reproduce their failure in verification builds.

[github-actions]

Test Results

 54 files   54 suites   9m 24s ⏱️
290 tests 262 ✅ 28 💤 0 ❌
936 runs  849 ✅ 87 💤 0 ❌

Results for commit a5d2475.

♻️ This comment has been updated with latest results.

[HannesWell]

In https://download.eclipse.org/eclipse/downloads/drops4/I20241109-1800/testresults/ep434I-unit-linux-x86_64-java21_linux.gtk.x86_64_21/org.eclipse.pde.ui.tests.AllPDETests.txt I see messages like the following and wonder if the Java indexing might have issues with JDKs above 17 (at least the ones installed on the I-build machines):

!ENTRY org.eclipse.pde.ui.tests 4 0 2024-11-10 00:41:47.557
!MESSAGE [testImportLinksMultiple[Import with source]] Some job is still running or waiting to run: 
'Java indexing... 37 files to index (/usr/lib/jvm/java-17-openjdk-amd64/lib/jrt-fs.jar)(828)'/org.eclipse.jdt.internal.core.search.processing.JobManager$1ProgressJob
thread info: "Worker-3: Java indexing... " prio=5 Id=48 TIMED_WAITING on org.eclipse.jdt.internal.core.search.indexing.IndexManager@7f14dc05
	at java.base@21.0.2/java.lang.Object.wait0(Native Method)
	-  waiting on org.eclipse.jdt.internal.core.search.indexing.IndexManager@7f14dc05
	at java.base@21.0.2/java.lang.Object.wait(Object.java:366)
	at org.eclipse.jdt.internal.core.search.processing.JobManager$1ProgressJob.run(JobManager.java:471)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

, 
'Building(6)'/org.eclipse.core.internal.events.AutoBuildJob
thread info: "Worker-7: Building" prio=5 Id=52 WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@43c1e01d
	at java.base@21.0.2/jdk.internal.misc.Unsafe.park(Native Method)
	-  waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@43c1e01d
	at java.base@21.0.2/java.util.concurrent.locks.LockSupport.park(LockSupport.java:371)
	at java.base@21.0.2/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:519)
	at java.base@21.0.2/java.util.concurrent.ForkJoinPool.unmanagedBlock(ForkJoinPool.java:3780)
	at java.base@21.0.2/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3725)
	at java.base@21.0.2/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1707)
	at java.base@21.0.2/java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:420)
	at org.eclipse.jdt.internal.compiler.ProcessTaskManager.removeNextUnits(ProcessTaskManager.java:81)
	...



!ENTRY org.eclipse.pde.ui.tests 1 0 2024-11-10 00:41:47.558
!MESSAGE [testImportLinksMultiple[Import with source]] Trying to cancel running jobs: [Java indexing... 37 files to index (/usr/lib/jvm/java-17-openjdk-amd64/lib/jrt-fs.jar)(828), Building(6), Animation start(37)]

!ENTRY org.eclipse.pde.ui.tests 4 0 2024-11-10 00:41:47.786
!MESSAGE [testImportLinksMultiple[Import with source]] Some job is still running or waiting to run: 
'Java indexing... 37 files to index (/usr/lib/jvm/java-17-openjdk-amd64/lib/jrt-fs.jar)(828)'/org.eclipse.jdt.internal.core.search.processing.JobManager$1ProgressJob
thread info: "Worker-3: Java indexing... " prio=5 Id=48 TIMED_WAITING on org.eclipse.jdt.internal.core.search.indexing.IndexManager@7f14dc05
	at java.base@21.0.2/java.lang.Object.wait0(Native Method)
	-  waiting on org.eclipse.jdt.internal.core.search.indexing.IndexManager@7f14dc05
	at java.base@21.0.2/java.lang.Object.wait(Object.java:366)
	at org.eclipse.jdt.internal.core.search.processing.JobManager$1ProgressJob.run(JobManager.java:471)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

, 
'Building(6)'/org.eclipse.core.internal.events.AutoBuildJob
thread info: "Worker-7: Building" prio=5 Id=52 RUNNABLE
	at org.eclipse.core.internal.dtree.DeltaDataTree.getData(DeltaDataTree.java:552)
	at org.eclipse.core.internal.events.ResourceDeltaFactory.createDelta(ResourceDeltaFactory.java:140)
	at org.eclipse.core.internal.events.ResourceDeltaFactory.createDelta(ResourceDeltaFactory.java:161)
	at org.eclipse.core.internal.events.ResourceDeltaFactory.createDelta(ResourceDeltaFactory.java:161)
	at org.eclipse.core.internal.events.ResourceDeltaFactory.createDelta(ResourceDeltaFactory.java:161)
	at org.eclipse.core.internal.events.ResourceDeltaFactory.createDelta(ResourceDeltaFactory.java:161)
	at org.eclipse.core.internal.events.ResourceDeltaFactory.computeDelta(ResourceDeltaFactory.java:67)
	at org.eclipse.core.internal.events.NotificationManager.getDelta(NotificationManager.java:256)
	...

But this might be a false hint, since https://download.eclipse.org/eclipse/downloads/drops4/I20241109-1800/testresults/ep434I-unit-linux-x86_64-java23_linux.gtk.x86_64_23/org.eclipse.pde.ui.tests.AllPDETests.txt
only shows the Some job is still running or waiting to run only on other cases, just like the test in other configurations do it too.

[HannesWell]

This is now tracked in #1477 where it was already identified that the failures are related to the infrastructure.