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Question

我发现以下帖子 Java 6 JVM Hang 出现了一些类似的异常。不存在僵局。但很多线程都处于WAIT状态。堆栈跟踪如下。我的客户端 JRE 是 1.6.0_18。

"Applet 1 LiveConnect Worker Thread" prio=4 tid=0x03382800 nid=0xe40 in Object.wait() [0x03acf000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x27f2b400> (a java.lang.Object)
    at java.lang.Object.wait(Object.java:485)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$LiveConnectWorker.run(Unknown Source)
    - locked <0x27f2b400> (a java.lang.Object)

    at java.lang.Thread.run(Unknown Source)

   Locked ownable synchronizers:
    - None

"Browser Side Object Cleanup Thread" prio=6 tid=0x03369800 nid=0x13b0 in Object.wait() [0x03a7f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x27f2b488> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(Unknown Source)
    - locked <0x27f2b488> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(Unknown Source)
    at sun.plugin2.main.client.LiveConnectSupport$BrowserSideObjectCleanupThread.run(Unknown Source)

   Locked ownable synchronizers:
    - None
"Threaded tile loader thread #0" prio=4 tid=0x03437000 nid=0x3f8 in Object.wait() [0x04a6f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x284c4d10> (a ilog.views.tiling.IlvThreadedTileLoader)
    at java.lang.Object.wait(Object.java:485)
    at ilog.views.tiling.IlvThreadedTileLoader$TaskThread.run(Unknown Source)
    - locked <0x284c4d10> (a ilog.views.tiling.IlvThreadedTileLoader)

   Locked ownable synchronizers:
    - None

"Threaded tile loader thread #0" prio=4 tid=0x04398400 nid=0x163c in Object.wait() [0x04a1f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x28489400> (a ilog.views.tiling.IlvThreadedTileLoader)
    at java.lang.Object.wait(Object.java:485)
    at ilog.views.tiling.IlvThreadedTileLoader$TaskThread.run(Unknown Source)
    - locked <0x28489400> (a ilog.views.tiling.IlvThreadedTileLoader)

   Locked ownable synchronizers:
    - None

"AWT-EventQueue-1" prio=6 tid=0x03d14400 nid=0x154c in Object.wait() [0x0416f000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x27f30210> (a java.awt.EventQueue)
    at java.lang.Object.wait(Object.java:485)
    at java.awt.EventQueue.getNextEvent(Unknown Source)
    - locked <0x27f30210> (a java.awt.EventQueue)
    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)

   Locked ownable synchronizers:
    - None

Answer 1

您有线程在等待 ilog.views.tiling.IlvThreadedTileLoader 实例，因此应该有一些其他线程在执行notify。在没有看到代码的情况下很难说更多。