java 7u45 的乐趣仍在继续。这次是 webstart 内部陷入僵局。这种情况在启动大型应用程序（约 100 个 jar）时非常一致地（每次）发生。
还有其他人遇到过这个问题或知道任何解决方法吗？除了恢复到 1.7.0_40 之外？
Thanks,
Found one Java-level deadlock:
=============================
"Java Web Start Main Thread":
waiting to lock monitor 0x066368bc (object 0x29e65428, a java.lang.Class),
which is held by "Finalizer"
"Finalizer":
waiting to lock monitor 0x00dbc954 (object 0x2a1b52b0, a com.sun.deploy.cache.CacheEntry),
which is held by "Java Web Start Main Thread"
Java stack information for the threads listed above:
===================================================
"Java Web Start Main Thread":
at com.sun.deploy.cache.MemoryCache.getLoadedResource(Unknown Source)
- waiting to lock <0x29e65428> (a java.lang.Class for com.sun.deploy.cache.MemoryCache)
at com.sun.deploy.cache.CachedJarFile.getCacheEntry(Unknown Source)
- locked <0x24810058> (a com.sun.deploy.cache.CachedJarFile)
at com.sun.deploy.cache.CachedJarFile.getManifest(Unknown Source)
- locked <0x24810058> (a com.sun.deploy.cache.CachedJarFile)
at com.sun.deploy.util.JarUtil.isBlobSigned(Unknown Source)
at com.sun.deploy.cache.CacheEntry.getJarFile(Unknown Source)
- locked <0x2a1b52b0> (a com.sun.deploy.cache.CacheEntry)
at com.sun.deploy.security.DeployManifestChecker.verify(Unknown Source)
at com.sun.javaws.security.AppPolicy.grantUnrestrictedAccess(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedResourcesHelper(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedResources(Unknown Source)
at com.sun.javaws.Launcher.prepareResources(Unknown Source)
at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main.access$000(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"Finalizer":
at com.sun.deploy.cache.CacheEntry.storageFilesExist(Unknown Source)
- waiting to lock <0x2a1b52b0> (a com.sun.deploy.cache.CacheEntry)
at com.sun.deploy.cache.MemoryCache.validateResource(Unknown Source)
at com.sun.deploy.cache.MemoryCache.getLoadedResource(Unknown Source)
- locked <0x29e65428> (a java.lang.Class for com.sun.deploy.cache.MemoryCache)
at com.sun.deploy.cache.CachedJarFile.isReferencedTo(Unknown Source)
at com.sun.deploy.cache.CachedJarFile.close(Unknown Source)
at java.util.zip.ZipFile.finalize(Unknown Source)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Unknown Source)
at java.lang.ref.Finalizer.access$100(Unknown Source)
at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)
Found 1 deadlock.
我在评论中提到的错误报告现已被接受。
不过，看起来它的 ID 作为该过程的一部分发生了变化。它从JI-命名空间到JDK-命名空间：https://bugs.openjdk.java.net/browse/JI-9007571 https://bugs.openjdk.java.net/browse/JI-9007571现在重定向到https://bugs.openjdk.java.net/browse/JDK-8027029 https://bugs.openjdk.java.net/browse/JDK-8027029。该问题可见于https://bugs.java.com/bugdatabase/view_bug?bug_id=8027029 https://bugs.java.com/bugdatabase/view_bug?bug_id=8027029现在也是。
该修复似乎正在讨论是否包含在 7u51 中，预计将于 1 月份发布。
我们的堆栈跟踪是相似的——死锁本身看起来是相同的。在我们的例子中，页面中有两个同时加载的小程序。
"thread applet-cl.applet.TutorApplet-2" prio=4 tid=0x04f21000 nid=0x528 waiting for monitor entry [0x0652f000]
java.lang.Thread.State: BLOCKED (on object monitor)
at com.sun.deploy.cache.MemoryCache.getLoadedResource(Unknown Source)
- waiting to lock <0x29d288b8> (a java.lang.Class for com.sun.deploy.cache.MemoryCache)
at com.sun.deploy.cache.CachedJarFile.getCacheEntry(Unknown Source)
- locked <0x247a4f90> (a com.sun.deploy.cache.CachedJarFile)
at com.sun.deploy.cache.CachedJarFile.getManifest(Unknown Source)
- locked <0x247a4f90> (a com.sun.deploy.cache.CachedJarFile)
at com.sun.deploy.util.JarUtil.isBlobSigned(Unknown Source)
at com.sun.deploy.cache.CacheEntry.getJarFile(Unknown Source)
- locked <0x29eccc00> (a com.sun.deploy.cache.CacheEntry)
at com.sun.javaws.security.SigningInfo.check(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedResourcesHelper(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedResources(Unknown Source)
at sun.plugin2.applet.JNLP2Manager.prepareLaunchFile(Unknown Source)
at sun.plugin2.applet.JNLP2Manager.loadJarFiles(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"thread applet-cl.applet.TTSApplet-1" prio=4 tid=0x04f1f800 nid=0xa40 waiting for monitor entry [0x0600f000]
java.lang.Thread.State: BLOCKED (on object monitor)
at com.sun.deploy.cache.CacheEntry.storageFilesExist(Unknown Source)
- waiting to lock <0x29eccc00> (a com.sun.deploy.cache.CacheEntry)
at com.sun.deploy.cache.MemoryCache.validateResource(Unknown Source)
at com.sun.deploy.cache.MemoryCache.getLoadedResource(Unknown Source)
- locked <0x29d288b8> (a java.lang.Class for com.sun.deploy.cache.MemoryCache)
at com.sun.deploy.cache.MemoryCache.getLoadedResource(Unknown Source)
- locked <0x29d288b8> (a java.lang.Class for com.sun.deploy.cache.MemoryCache)
at com.sun.deploy.cache.Cache.getCacheEntry(Unknown Source)
at com.sun.deploy.cache.Cache.getCacheEntry(Unknown Source)
at com.sun.deploy.cache.Cache.getCachedResourceFilePath(Unknown Source)
at com.sun.deploy.cache.ResourceProviderImpl.getCachedResourceFilePath(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.getSignedJNLPBits(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.getSignedJNLPFile(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedLaunchDescHelper(Unknown Source)
at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedLaunchDesc(Unknown Source)
at sun.plugin2.applet.JNLP2Manager.prepareLaunchFile(Unknown Source)
at sun.plugin2.applet.JNLP2Manager.loadJarFiles(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
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