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Created attachment 282366 [details] Screenshot In my platform dev workspace (4.15) I am getting frequently IllegalArgumentExceptions from the API tools builder. - org.eclipse.jdt.core version 3.21.0.v20200304-1404 - org.eclipse.pde.api.tools 1.1.1300.v20200318-1350 java.lang.IllegalArgumentException at org.eclipse.jdt.core.dom.ASTParser.<init>(ASTParser.java:241) at org.eclipse.jdt.core.dom.ASTParser.newParser(ASTParser.java:134) at org.eclipse.pde.api.tools.internal.provisional.scanner.TagScanner.scan(TagScanner.java:660) at org.eclipse.pde.api.tools.internal.provisional.scanner.TagScanner.scan(TagScanner.java:636) at org.eclipse.pde.api.tools.internal.ProjectApiDescription$TypeNode.refresh(ProjectApiDescription.java:250) at org.eclipse.pde.api.tools.internal.ApiDescription.findNode(ApiDescription.java:431) at org.eclipse.pde.api.tools.internal.ProjectApiDescription.visit(ProjectApiDescription.java:403) at org.eclipse.pde.api.tools.internal.ProjectApiDescription.accept(ProjectApiDescription.java:372) at org.eclipse.pde.api.tools.internal.builder.ReferenceAnalyzer.buildProblemDetectors(ReferenceAnalyzer.java:304) at org.eclipse.pde.api.tools.internal.builder.ReferenceAnalyzer.analyze(ReferenceAnalyzer.java:233) at org.eclipse.pde.api.tools.internal.builder.BaseApiAnalyzer.checkApiUsage(BaseApiAnalyzer.java:1249) at org.eclipse.pde.api.tools.internal.builder.BaseApiAnalyzer.analyzeComponent(BaseApiAnalyzer.java:285) at org.eclipse.pde.api.tools.internal.builder.ApiAnalysisBuilder.buildAll(ApiAnalysisBuilder.java:799) at org.eclipse.pde.api.tools.internal.builder.ApiAnalysisBuilder.build(ApiAnalysisBuilder.java:427) at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:832) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:220) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:263) at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:316) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:319) at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:371) at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:392) at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:154) at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Do you have a Java 14 project in that workspace (maybe just for playing around)? That parser class only knows up to Java 13 and throws that exception for unknown Java levels in your version of jdt.core. I think you must upgrade to the milestone releases (or install the Java 14 support from marketplace) to be able to use Java 14, right?
The dev IDE is started with an AdoptOpenJDK 8. Additionally configured is an AdoptOpenJDK 11.
I looked at this. You have taken latest PDE code but not latest JDT code. Or you have taken 4.15 eclipse and master code from PDE. I think you should either take 4.15 with R4_15_maintenance code or 4.16 with master code. If you want to work on 4.15 with master code from PDE, additionally take jdt.core's master code too. That would work too. Let me know if any of the solutions mentioned above works for you.
Karsten, I have the same issue meanwhile in all workspaces after upgrading to the 4.16 M1 version via Oomph. At least for me the problem is that the top level EPP package prohibits upgrading JDT due to some conflict. You may want to run Help->Upgrade, to see if you have a similar conflict.
For me the issue has vanished after upgrading to https://download.eclipse.org/staging/2020-06/, since that resolves the conflicting JDT dependency. Karsten, please verify.
Marking works for me based on last comment
