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This bug was originally marked as duplicate of bug 245364, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE Dev (Build nbms-and-javadoc-4989-on-20161007) VM: Java HotSpot(TM) 64-Bit Server VM, 25.101-b13, Java(TM) SE Runtime Environment, 1.8.0_101-b13 OS: Linux User Comments: GUEST: The editor spikes to 100% CPU usage anytime an edit is performed on an XML file with a SYSTEM dtd defined. Stacktrace: java.lang.OutOfMemoryError: GC overhead limit exceeded at java.lang.SecurityManager.checkPackageAccess(SecurityManager.java:1563) at java.lang.Class.checkPackageAccess(Class.java:2372) at java.lang.Class.checkMemberAccess(Class.java:2351) at java.lang.Class.getMethod(Class.java:1783) at org.apache.lucene.store.MMapDirectory$1.run(MMapDirectory.java:160) at java.security.AccessController.doPrivileged(AccessController.java:0)
Created attachment 162820 [details] stacktrace