ConcurrentModificationException, not sure how to replicate #1144
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Ran into this as well : All I did was open https://github.com/eclipse/lemminx with vscode-java in a workspace that was clean and as the import/build was occuring, I would switch between stacktrace1stacktrace2 |
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I can see it also relatively often (a few times a day when running an IDE using a launch config). Overally, the JavacFileManager isn't really concurrent-friendly. We may need to put some extra synchronization here and there in our custom filemanager. I suspect this is not the first occurrence of the problem. NetBeans or IntelliJ probably got the same and I'm wondering whether there could be a pre-existing JavacFileManager (with jar caching and so on) we could reuse somewhere... |
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java.util.ConcurrentModificationException
at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1230)
at jdk.compiler/com.sun.tools.javac.file.JavacFileManager.pathsAndContainers(JavacFileManager.java:1021)
at jdk.compiler/com.sun.tools.javac.file.JavacFileManager.list(JavacFileManager.java:777)
at jdk.compiler/com.sun.tools.javac.platform.JDKPlatformProvider$PlatformDescriptionImpl$1.list(JDKPlatformProvider.java:188)
at java.compiler@23-ea/javax.tools.ForwardingJavaFileManager.list(ForwardingJavaFileManager.java:82)
at org.eclipse.jdt.internal.javac.CachingJDKPlatformArguments$1$1.list(CachingJDKPlatformArguments.java:123)
at jdk.compiler/com.sun.tools.javac.main.DelegatingJavaFileManager.list(DelegatingJavaFileManager.java:83)
at jdk.compiler/com.sun.tools.javac.code.ClassFinder.list(ClassFinder.java:749)
at jdk.compiler/com.sun.tools.javac.code.ClassFinder.scanModulePaths(ClassFinder.java:621)
at jdk.compiler/com.sun.tools.javac.code.ClassFinder.fillIn(ClassFinder.java:569)
at jdk.compiler/com.sun.tools.javac.code.ClassFinder.complete(ClassFinder.java:311)
at jdk.compiler/com.sun.tools.javac.code.Symbol.complete(Symbol.java:687)
at jdk.compiler/com.sun.tools.javac.code.Symbol$PackageSymbol.members(Symbol.java:1183)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$ImportsPhase.implicitImports(TypeEnter.java:329)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$ImportsPhase.resolveImports(TypeEnter.java:381)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$ImportsPhase.runPhase(TypeEnter.java:318)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$Phase.doCompleteEnvs(TypeEnter.java:279)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:248)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter.complete(TypeEnter.java:195)
at jdk.compiler/com.sun.tools.javac.code.Symbol.complete(Symbol.java:687)
at jdk.compiler/com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1455)
at jdk.compiler/com.sun.tools.javac.comp.Enter.complete(Enter.java:632)
at jdk.compiler/com.sun.tools.javac.comp.Enter.main(Enter.java:599)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.enterTrees(JavaCompiler.java:1077)
at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.enter(JavacTaskImpl.java:345)
at org.eclipse.jdt.core.dom.JavacBindingResolver.resolve(JavacBindingResolver.java:465)
at org.eclipse.jdt.core.dom.JavacBindingResolver.resolvePackage(JavacBindingResolver.java:1236)
at org.eclipse.jdt.core.dom.PackageDeclaration.resolveBinding(PackageDeclaration.java:323)
at org.eclipse.jdt.core.dom.JavacCompilationUnitResolver.resolveBindings(JavacCompilationUnitResolver.java:461)
at org.eclipse.jdt.core.dom.JavacCompilationUnitResolver.resolveBindings(JavacCompilationUnitResolver.java:455)
at org.eclipse.jdt.core.dom.JavacCompilationUnitResolver.toCompilationUnit(JavacCompilationUnitResolver.java:548)
at org.eclipse.jdt.core.dom.ASTParser.internalCreateASTCached(ASTParser.java:1381)
at org.eclipse.jdt.core.dom.ASTParser.lambda$1(ASTParser.java:1260)
at org.eclipse.jdt.internal.core.JavaModelManager.cacheZipFiles(JavaModelManager.java:5708)
at org.eclipse.jdt.core.dom.ASTParser.internalCreateAST(ASTParser.java:1260)
at org.eclipse.jdt.core.dom.ASTParser.createAST(ASTParser.java:915)
at org.eclipse.jdt.core.manipulation.CoreASTProvider$1.run(CoreASTProvider.java:294)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
at org.eclipse.jdt.core.manipulation.CoreASTProvider.createAST(CoreASTProvider.java:286)
at org.eclipse.jdt.core.manipulation.CoreASTProvider.getAST(CoreASTProvider.java:199)
at org.eclipse.jdt.core.manipulation.CoreASTProvider.getAST(CoreASTProvider.java:189)
at org.eclipse.jdt.core.manipulation.CoreASTProvider.getAST(CoreASTProvider.java:189)
at org.eclipse.jdt.core.manipulation.SharedASTProviderCore.getAST(SharedASTProviderCore.java:138)
at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartListenerGroup.calculateASTandInform(SelectionListenerWithASTManager.java:167)
at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartListenerGroup$1.lambda$0(SelectionListenerWithASTManager.java:149)
at org.eclipse.jdt.internal.core.JavaModelManager.cacheZipFiles(JavaModelManager.java:5708)
at org.eclipse.jdt.internal.core.JavaModelManager.callReadOnly(JavaModelManager.java:5697)
at org.eclipse.jdt.core.JavaCore.callReadOnly(JavaCore.java:6150)
at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartListenerGroup$1.run(SelectionListenerWithASTManager.java:149)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
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