On Sun, 16 Aug 2026 14:28:26 GMT, Yasumasa Suenaga <[email protected]> wrote:
> I tried to parse the heap dump generated by `jhsdb jmap`, but it couldn't > with following error on MAT. This exception happens since JDK 28. It does not > happen on JDK 27 EA and 26 at least. > > > java.lang.NullPointerException > at > java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62) > at > java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) > at > java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:483) > at > java.base/java.util.concurrent.ForkJoinTask.getException(ForkJoinTask.java:564) > at > java.base/java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:580) > at > java.base/java.util.concurrent.ForkJoinTask.get(ForkJoinTask.java:1022) > at > org.eclipse.mat.parser.internal.GarbageCleaner.createHistogramOfUnreachableObjects(GarbageCleaner.java:592) > at > org.eclipse.mat.parser.internal.GarbageCleaner.clean(GarbageCleaner.java:170) > at > org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(SnapshotFactoryImpl.java:505) > at > org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnapshot(SnapshotFactoryImpl.java:244) > at > org.eclipse.mat.snapshot.SnapshotFactory.openSnapshot(SnapshotFactory.java:149) > at > org.eclipse.mat.ui.snapshot.ParseHeapDumpJob.run(ParseHeapDumpJob.java:99) > at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) > Caused by: java.lang.NullPointerException: Cannot invoke > "org.eclipse.mat.parser.model.ClassImpl.getName()" because "r.clazz" is null > at > org.eclipse.mat.parser.internal.GarbageCleaner$CreateHistogramOfUnreachableObjectsChunk.call(GarbageCleaner.java:683) > at > org.eclipse.mat.parser.internal.GarbageCleaner$CreateHistogramOfUnreachableObjectsChunk.call(GarbageCleaner.java:1) > at > java.base/java.util.concurrent.ForkJoinTask$AdaptedInterruptibleCallable.compute(ForkJoinTask.java:1718) > at > java.base/java.util.concurrent.ForkJoinTask$InterruptibleTask.exec(ForkJoinTask.java:1662) > at > java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:511) > at > java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1450) > at > java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:2019) > at > java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187) > > > [JDK-8389219](https://bugs.openjdk.org/browse/JDK-8389219) i... This pull request has now been integrated. Changeset: 93231a94 Author: Yasumasa Suenaga <[email protected]> URL: https://git.openjdk.org/jdk/commit/93231a94d4bc65fd820746fa8cb989c9439b9324 Stats: 121 lines in 4 files changed: 117 ins; 0 del; 4 mod 8390442: Heap dump generated by SA cannot be parsed on MAT Reviewed-by: cjplummer, kevinw ------------- PR: https://git.openjdk.org/jdk/pull/32386
