环境 windows7  jdk1.6u45

执行命令 jstack -F pid 没问题，当我执行jstack -F pid>>d:\stack.txt 出现如下错误。 为什么加上输出就不行呢，但是虽然报错，stack.txt文本照样有内容。


sun.jvm.hotspot.utilities.AssertionFailure: must be above this frame on stack
        at sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
        at sun.jvm.hotspot.runtime.amd64.AMD64Frame.senderForEntryFrame(AMD64Frame.java:302)
        at sun.jvm.hotspot.runtime.amd64.AMD64Frame.sender(AMD64Frame.java:270)
        at sun.jvm.hotspot.runtime.Frame.sender(Frame.java:194)
        at sun.jvm.hotspot.runtime.Frame.realSender(Frame.java:199)
        at sun.jvm.hotspot.runtime.VFrame.sender(VFrame.java:119)
        at sun.jvm.hotspot.runtime.VFrame.javaSender(VFrame.java:151)
        at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:76)
        at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
        at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
        at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
        at sun.tools.jstack.JStack.main(JStack.java:84)
......

看起来是个在JDK7里已经修好了的bug。JDK-7176524: Incorrect value of ENTRY_FRAME_CALL_WRAPPER_OFFSET in jstack in jdk6u32(amd64)
别用JDK6了，升级吧…

呵呵。。3Q 。。没办法啊。公司生产环境是jdk1.6