当我尝试在“http://localhost:8080/_ah/admin/datastore”的本地数据存储查看器中查看任何实体时，在 Windows 7 Pro 64 位上运行的 Google AppEngine 开发服务器会引发异常。实体列表显示得很好并且我的应用程序能够将实体添加到数据存储区。问题可能是什么？它与安全管理器有关吗？
Nov 28, 2012 8:59:59 PM com.google.appengine.api.datastore.dev.LocalDatastoreService init
INFO: Local Datastore initialized:
Type: High Replication
Storage: d:\project\out\local_db.bin
Nov 28, 2012 8:59:59 PM com.google.appengine.api.datastore.dev.LocalDatastoreService load
INFO: Time to load datastore: 32 ms
Nov 28, 2012 8:59:59 PM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: /_ah/admin/datastore
java.security.AccessControlException: access denied (java.io.FilePermission d:\project\out\datastore-indexes-auto.xml read)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:289)
at java.lang.SecurityManager.checkRead(SecurityManager.java:871)
at java.io.File.exists(File.java:731)
at com.google.appengine.api.datastore.dev.LocalCompositeIndexManager.getGeneratedIndexFileInputStream(LocalCompositeIndexManager.java:430)
at com.google.appengine.api.datastore.dev.LocalCompositeIndexManager.getCompositeIndicesNode(LocalCompositeIndexManager.java:448)
at com.google.appengine.api.datastore.dev.LocalCompositeIndexManager.getIndices(LocalCompositeIndexManager.java:273)
at com.google.appengine.api.datastore.dev.LocalCompositeIndexManager.getIndicesForKind(LocalCompositeIndexManager.java:294)
at com.google.appengine.api.datastore.dev.LocalDatastoreCostAnalysis.changedIndexRows(LocalDatastoreCostAnalysis.java:136)
at com.google.appengine.api.datastore.dev.LocalDatastoreCostAnalysis.getWriteOps(LocalDatastoreCostAnalysis.java:83)
at com.google.appengine.api.datastore.dev.LocalDatastoreCostAnalysis.getWriteCost(LocalDatastoreCostAnalysis.java:61)
at com.google.appengine.api.datastore.dev.LocalDatastoreCostAnalysis.getCreationCostAnalysis(LocalDatastoreCostAnalysis.java:45)
at com.google.appengine.api.datastore.dev.LocalDatastoreService.getCreationCostAnalysis(LocalDatastoreService.java:2580)
at com.google.apphosting.utils.servlet.DatastoreViewerServlet.getEntityViews(DatastoreViewerServlet.java:211)
at com.google.apphosting.utils.servlet.DatastoreViewerServlet.doGetDatastoreViewer(DatastoreViewerServlet.java:295)
at com.google.apphosting.utils.servlet.DatastoreViewerServlet.doGet(DatastoreViewerServlet.java:235)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:123)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:61)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:383)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)