我有一个应用程序，在某些情况下我无法重现，它会锁定 Firefox 和 Chrome。我不知道是什么导致了问题。我无法获得任何信息，因为两个浏览器都刚刚锁定 - 甚至 firebug 和 Chrome 的开发人员工具都冻结了。印象深刻，我知道！
无论如何，我想我会在 Eclipse 中连接调试器来运行应用程序，但是使用 RemoteApi 来使用实际数据，这样我就可以看到这里发生了什么。我写了一个 ServletFilter：
public class RemoteApiFilter implements Filter {
RemoteApiOptions options;
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
try {
RemoteApiInstaller installer = new RemoteApiInstaller();
installer.install(options);
chain.doFilter(request, response);
installer.uninstall();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void init(FilterConfig config) throws ServletException {
options = new RemoteApiOptions().server(
config.getInitParameter("host"), 443).credentials(
config.getInitParameter("email"),
config.getInitParameter("password"));
}
}
我通过这个过滤器运行每个请求，我认为这将使我的整个应用程序正常工作，但使用实时生产数据存储而不是开发数据存储。但它没有用！相反，在我第一次调用数据存储 api 时，我得到了某种线程访问冲突异常：
java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:166)
at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:191)
at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:299)
at java.lang.Thread.init(Thread.java:336)
at java.lang.Thread.<init>(Thread.java:626)
at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:542)
at java.util.concurrent.ThreadPoolExecutor.addThread(ThreadPoolExecutor.java:672)
at java.util.concurrent.ThreadPoolExecutor.addIfUnderCorePoolSize(ThreadPoolExecutor.java:697)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:652)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:92)
at com.google.appengine.tools.remoteapi.RemoteApiDelegate.makeAsyncCall(RemoteApiDelegate.java:98)
at com.google.apphosting.api.ApiProxy.makeAsyncCall(ApiProxy.java:184)
at com.google.appengine.api.datastore.DatastoreApiHelper.makeAsyncCall(DatastoreApiHelper.java:81)
at com.google.appengine.api.datastore.AsyncDatastoreServiceImpl.get(AsyncDatastoreServiceImpl.java:306)
at com.googlecode.objectify.cache.CachingAsyncDatastoreService.getFromDatastore(CachingAsyncDatastoreService.java:111)
at com.googlecode.objectify.cache.CachingAsyncDatastoreService.get(CachingAsyncDatastoreService.java:372)
at com.googlecode.objectify.impl.AsyncObjectifyImpl.get(AsyncObjectifyImpl.java:68)
at com.googlecode.objectify.impl.AsyncObjectifyImpl.find(AsyncObjectifyImpl.java:192)
at com.googlecode.objectify.impl.AsyncObjectifyImpl.get(AsyncObjectifyImpl.java:101)
at com.googlecode.objectify.impl.AsyncObjectifyImpl.get(AsyncObjectifyImpl.java:124)
at com.googlecode.objectify.impl.ObjectifyImpl.get(ObjectifyImpl.java:63)
at com.activegrade.server.data.DataCoordinatorAppengineImpl.verifyUser(DataCoordinatorAppengineImpl.java:471)
at com.activegrade.server.servlets.MainPageChooser.doGet(MainPageChooser.java:54)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.activegrade.server.filter.RemoteAPIFilter.doFilter(RemoteAPIFilter.java:25)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
at org.mortbay.jetty.servlet.ServletHandler$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.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:351)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$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)
我正在使用 Objectify 和 Resteasy，但除此之外，这是一个非常简单的设置。我完全不知道接下来要尝试什么。
这是尝试使用 GAE 上的实时数据调试我的 GWT 应用程序的好方法吗？出了什么问题，接下来我应该尝试什么来获取更多信息？