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This bug was originally marked as duplicate of bug 223807, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.3 (Build 201302132200) VM: Java HotSpot(TM) 64-Bit Server VM, 23.7-b01, Java(TM) SE Runtime Environment, 1.7.0_17-b02 OS: Windows 7 User Comments: raphievila: Opening a new project, either way, Netbeans never stop Local Synchronization when opens, make the IDE use most of the memory and slow down the system. Stacktrace: java.lang.OutOfMemoryError: GC overhead limit exceeded at java.lang.String.toLowerCase(String.java:2439) at java.io.Win32FileSystem.hashCode(Win32FileSystem.java:598) at java.io.File.hashCode(File.java:1985) at java.util.HashMap.hash(HashMap.java:351) at java.util.HashMap.getEntry(HashMap.java:443) at java.util.HashMap.get(HashMap.java:405)
Created attachment 140000 [details] stacktrace
Already fixed in 7.4. The MissingClassRule hint rule doesn't run during the projects scanning anymore.