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OutOfMemoryError: GC overhead limit exceeded may be thrown during NetBeans startup on Windows, see https://java.net/jira/browse/VISUALVM-593. Caused by listing a potentially large number of files in TEMP directory. In org.netbeans.lib.profiler.utils.MiscUtils.deleteHeapTempFiles() we can now use new Java 7 APIs to iterate over files in directory without throwing OOMEs, see Files.newDirectoryStream() or Files.walkFileTree(). java.lang.OutOfMemoryError: GC overhead limit exceeded at java.util.Arrays.copyOf(Arrays.java:2367) at java.lang.String.<init>(String.java:168) at java.io.Win32FileSystem.resolve(Win32FileSystem.java:259) at java.io.File.<init>(File.java:262) at java.io.File.listFiles(File.java:1206) at org.netbeans.lib.profiler.utils.MiscUtils.deleteHeapTempFiles(MiscUtils.java:518) at org.netbeans.modules.profiler.ProfilerModule.restored(ProfilerModule.java:134) at org.netbeans.core.startup.NbInstaller.loadCode(NbInstaller.java:471) at org.netbeans.core.startup.NbInstaller.loadImpl(NbInstaller.java:394) at org.netbeans.core.startup.NbInstaller.access$000(NbInstaller.java:105) at org.netbeans.core.startup.NbInstaller$1.run(NbInstaller.java:346) at org.openide.filesystems.FileUtil$2.run(FileUtil.java:435) at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127) at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:609) at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:419) at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:439) at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:343) at org.netbeans.ModuleManager.enable(ModuleManager.java:1194) at org.netbeans.ModuleManager.enable(ModuleManager.java:1017) at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:340) at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:276) at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:301) at org.netbeans.core.startup.Main.getModuleSystem(Main.java:181) at org.netbeans.core.startup.Main.getModuleSystem(Main.java:150) at org.netbeans.core.startup.Main.start(Main.java:307) at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:123) at java.lang.Thread.run(Thread.java:745)
Fixed in profiler-main changeset: 300152:b7920448eec8 user: Tomas Hurka <thurka@netbeans.org> date: Thu Sep 15 12:29:44 2016 +0200 summary: bugfix #268034, use DirectoryStream (instead of File.listFiles()) to avoid OOME on directories with large number of files
Integrated into 'main-silver', will be available in build *201609160002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main-silver/rev/b7920448eec8 User: Tomas Hurka <thurka@netbeans.org> Log: bugfix #268034, use DirectoryStream (instead of File.listFiles()) to avoid OOME on directories with large number of files