为什么Java 7请求签名应用程序的网络权限？

时间：2012-06-15 11:56:14

标签： java security java-web-start

从Java 7 Update 5开始，我的Java Web Start应用程序正在请求建立连接的权限。该应用程序使用有效证书签名。

弹出窗口显示以下文字：

  

应用程序已请求建立连接的权限   www.example.com。你想允许这个动作吗？ [确定] [取消]

在拒绝请求时，我在控制台上获得此跟踪：

Uncaught error fetching image:
java.lang.SecurityException
    at java.lang.SecurityManager.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkConnect(Unknown Source)
    at com.sun.javaws.security.JavaWebStartSecurity.checkConnect(Unknown Source)
    at sun.awt.image.URLImageSource.checkSecurity(Unknown Source)
    at sun.awt.image.ImageRepresentation.imageComplete(Unknown Source)
    at sun.awt.image.InputStreamImageSource.errorConsumer(Unknown Source)
    at sun.awt.image.InputStreamImageSource.setDecoder(Unknown Source)
    at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
    at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
    at sun.awt.image.ImageFetcher.run(Unknown Source)

这是请求权限时的线程转储：

"Image Fetcher 2" daemon prio=8 tid=0x04198000 nid=0xc24 in Object.wait() [0x0470e000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x1d67b050> (a java.lang.Object)
        at java.lang.Object.wait(Object.java:503)
        at com.sun.javaws.ui.JavawsSysRun.delegate(Unknown Source)
        - locked <0x1d67b050> (a java.lang.Object)
        at com.sun.deploy.util.DeploySysRun.execute(Unknown Source)
        at com.sun.deploy.util.DeploySysRun$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.deploy.util.DeploySysRun.executePrivileged(Unknown Source)
        at com.sun.deploy.ui.UIFactory.showApiDialog(Unknown Source)
        at com.sun.deploy.uitoolkit.impl.awt.ui.UIFactoryImpl.showMessageDialog(Unknown Source)
        at com.sun.deploy.uitoolkit.impl.awt.ui.UIFactoryImpl.showMessageDialog(Unknown Source)
        at com.sun.jnlp.ApiDialog.askUser(Unknown Source)
        at com.sun.jnlp.ApiDialog.askUser(Unknown Source)
        at com.sun.jnlp.ApiDialog.askConnect(Unknown Source)
        at com.sun.javaws.security.JavaWebStartSecurity.checkConnect(Unknown Source)
        at java.net.InetAddress.getAllByName0(Unknown Source)
        at java.net.InetAddress.getAllByName(Unknown Source)
        at java.net.InetAddress.getByName(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.sun.deploy.cache.Cache.getCurrentIP(Unknown Source)
        at com.sun.deploy.cache.Cache.isCacheEntryIPValid(Unknown Source)
        at com.sun.deploy.cache.Cache.getCacheEntryFromIdxFiles(Unknown Source)
        at com.sun.deploy.cache.Cache.getCacheEntry(Unknown Source)
        at com.sun.deploy.cache.Cache.getCacheEntry(Unknown Source)
        at com.sun.deploy.cache.Cache.getCacheEntry(Unknown Source)
        at com.sun.deploy.net.DownloadEngine.isUpdateAvailable(Unknown Source)
        at com.sun.deploy.cache.DeployCacheHandler.get(Unknown Source)
        - locked <0x12fd06d0> (a java.lang.Object)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.followRedirect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        - locked <0x12fd0728> (a sun.net.www.protocol.http.HttpURLConnection)
        at com.sun.deploy.net.CrossDomainXML.check(Unknown Source)
        at com.sun.deploy.net.CrossDomainXML.check(Unknown Source)
        - locked <0x1d6fcf40> (a java.lang.Class for com.sun.deploy.net.CrossDomainXML)
        at com.sun.javaws.security.JavaWebStartSecurity.checkConnect(Unknown Source)
        at sun.net.www.http.HttpClient.openServer(Unknown Source)
        - locked <0x12fd09b8> (a sun.net.www.http.HttpClient)
        at sun.net.www.http.HttpClient.<init>(Unknown Source)
        at sun.net.www.http.HttpClient.New(Unknown Source)
        at sun.net.www.http.HttpClient.New(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        - locked <0x12fd0a40> (a sun.net.www.protocol.http.HttpURLConnection)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)
        at javax.xml.parsers.SAXParser.parse(Unknown Source)
        at com.sun.deploy.net.CrossDomainXML$2.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.deploy.net.CrossDomainXML.check(Unknown Source)
        at com.sun.deploy.net.CrossDomainXML.check(Unknown Source)
        - locked <0x1d6fcf40> (a java.lang.Class for com.sun.deploy.net.CrossDomainXML)
        at com.sun.javaws.security.JavaWebStartSecurity.checkConnect(Unknown Source)
        at sun.awt.image.URLImageSource.checkSecurity(Unknown Source)
        at sun.awt.image.InputStreamImageSource.setDecoder(Unknown Source)
        at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
        at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
        at sun.awt.image.ImageFetcher.run(Unknown Source)

"AWT-EventQueue-0" prio=6 tid=0x0315f800 nid=0xc80 waiting on condition [0x037cf000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x1d6b46a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(Unknown Source)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
        at java.awt.EventQueue.getNextEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)

"javawsApplicationMain" prio=6 tid=0x040b4c00 nid=0x1198 in Object.wait() [0x0461f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x1db95260> (a java.awt.MediaTracker)
        at java.awt.MediaTracker.waitForID(Unknown Source)
        - locked <0x1db95260> (a java.awt.MediaTracker)
        at javax.swing.ImageIcon.loadImage(Unknown Source)
        - locked <0x1db95260> (a java.awt.MediaTracker)
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at javax.swing.ImageIcon.<init>(Unknown Source)
        at com.mycompany.myapp.j.c(Unknown Source)
        at com.mycompany.myapp.j.<init>(Unknown Source)
        at com.mycompany.myapp.MainClass.main(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.sun.javaws.Launcher.executeApplication(Unknown Source)
        at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
        at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
        at com.sun.javaws.Launcher.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

"CacheCleanUpThread" daemon prio=6 tid=0x03232800 nid=0x1048 waiting for monitor entry [0x0390f000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at com.sun.deploy.net.CrossDomainXML.quickCheck(Unknown Source)
        - waiting to lock <0x1d6fcf40> (a java.lang.Class for com.sun.deploy.net.CrossDomainXML)
        at com.sun.javaws.security.JavaWebStartSecurity.checkConnect(Unknown Source)
        at java.net.InetAddress.getAllByName0(Unknown Source)
        at java.net.InetAddress.getAllByName(Unknown Source)
        at java.net.InetAddress.getByName(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.sun.deploy.cache.Cache.getCurrentIP(Unknown Source)
        at com.sun.deploy.cache.Cache.isCacheEntryIPValid(Unknown Source)
        at com.sun.deploy.cache.Cache.getCacheEntryFromFile(Unknown Source)
        at com.sun.deploy.cache.Cache.getCacheEntryFromFile(Unknown Source)
        at com.sun.deploy.cache.CleanupThread.getCurrentCacheSize(Unknown Source)
        at com.sun.deploy.cache.CleanupThread.run(Unknown Source)
        - locked <0x1d6b5518> (a java.lang.Object)

"Javaws Secure Thread" daemon prio=6 tid=0x03158c00 nid=0xb9c in Object.wait() [0x0377f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x12fd1e58> (a java.awt.EventQueue$1AWTInvocationLock)
        at java.lang.Object.wait(Object.java:503)
        at java.awt.EventQueue.invokeAndWait(Unknown Source)
        - locked <0x12fd1e58> (a java.awt.EventQueue$1AWTInvocationLock)
        at javax.swing.SwingUtilities.invokeAndWait(Unknown Source)
        at com.sun.deploy.ui.DialogTemplate.setVisible(Unknown Source)
        at com.sun.deploy.ui.UIFactory$10.execute(Unknown Source)
        at com.sun.javaws.ui.JavawsSysRun$SecureThread.doWork(Unknown Source)
        at com.sun.javaws.ui.JavawsSysRun$SecureThread.run(Unknown Source)
        - locked <0x1d67b050> (a java.lang.Object)

该应用程序包含一个欢迎屏幕，用于从网站获取图像，然后关闭此屏幕并显示主应用程序窗口。警告仅在欢迎屏幕出现之前显示。应用程序启动后，尽管应用程序启动了多个连接，但不会显示其他警告。

导致此问题的原因是什么？这是Java 7u5中的回归还是新功能？我在release notes中没有看到任何对此的引用。

谢谢

1 个答案:

答案 0 :(得分：5)

我们遇到这种情况以及安全弹出窗口有时会导致死锁。 （由于其他webstart错误）。这很可能是由于发行说明中7u5中7177094的“修复”造成的。我试着对你的bug＃7177349发表评论，但对它的评论不可用。

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