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lucene IndexReader.open(dir) 报错5
请问大师，下面的错误是怎么导致的？
java.security.AccessControlException: Access denied (java.lang.reflect.ReflectPermission suppressAccessChecks)
at java.security.AccessController.checkPermission(AccessController.java:108)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:544)
at java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:118)
at org.apache.lucene.store.MMapDirectory$1.run(MMapDirectory.java:166)
at java.security.AccessController.doPrivileged(AccessController.java:251)
at org.apache.lucene.store.MMapDirectory.cleanMapping(MMapDirectory.java:162)
at org.apache.lucene.store.MMapDirectory$MMapIndexInput.close(MMapDirectory.java:440)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:647)
at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:72)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:256)
at JavaAgent.getResult(Unknown Source)
at JavaAgent.NotesMain(Unknown Source)
at lotus.domino.AgentBase.runNotes(Unknown Source)
at lotus.domino.NotesThread.run(Unknown Source)
java.lang.NullPointerException
at JavaAgent.NotesMain(Unknown Source)
at lotus.domino.AgentBase.runNotes(Unknown Source)
at lotus.domino.NotesThread.run(Unknown Source)
报错修改代码为：
FSDirectory dir = SimpleFSDirectory.open(folder);
IndexReader reader = IndexReader.open(dir);
其中folder确定是存在的，路径无误。2013年6月24日 09:43
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