为什么 Java 7 会为已签名的应用程序请求网络权限? [英] Why is Java 7 requesting network permissions for a signed application?
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问题描述
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.应用程序使用有效证书签名.
Since Java 7 Update 5 my Java Web Start application is requesting the permission to establish connections. The application is signed with a valid certificate.
弹出窗口显示如下文本:
A popup is displayed with the following text:
应用程序已请求建立连接的权限www.example.com.您要允许此操作吗?[确定] [取消]
The application has requested permission to establish connections to www.example.com. Do you want to allow this action? [OK] [Cancel]
在拒绝请求时，我在控制台上得到了这个跟踪:
On rejecting the request I get this trace on the console:
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:
And here is the thread dump when the permission is requested:
"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从网站获取图像的欢迎屏幕，然后关闭该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.
The application consists in a welcome screen that fetches images from a website, this screen is then dismissed and the main application window appears. The warning is displayed only before the welcome screen appears. Once the application is started no other warning is displayed despite several connections initiated by the application.
是什么导致了这个问题?这是 Java 7u5 中的回归还是新功能?我在 发行说明.
What is causing this issue? Is this a regression in Java 7u5 or a new feature? I haven't seen any reference to this in the release notes.
谢谢
推荐答案
我们也遇到了这个问题，而且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"所致.我试图但对您的错误 #7177349 的评论，但没有评论.
We're running into this as well combined with the security popup sometimes causing a deadlock. (due to other webstart bugs). This is most likely due to the 'fix' for 7177094 in 7u5 from the release notes. I tried to but this comment on your bug # 7177349, but comments on it were not available.
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