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我有一个 core.31690 文件，我想将其转换为 hprof。我试过了：jmap -dump:format=b,file=mydump.hprof /usr/bin/java core.31690但我得到了以下信息：

Attaching to core core.31690 from executable /usr/bin/java, please wait...
Exception in thread "main" java.lang.reflect.InvocationTargetException
    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.jmap.JMap.runTool(JMap.java:179)
    at sun.tools.jmap.JMap.main(JMap.java:110)
Caused by: sun.jvm.hotspot.debugger.UnmappedAddressException
    at sun.jvm.hotspot.debugger.PageCache.checkPage(PageCache.java:208)
    at sun.jvm.hotspot.debugger.PageCache.getData(PageCache.java:63)
    at sun.jvm.hotspot.debugger.DebuggerBase.readBytes(DebuggerBase.java:217)
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:482)
    at sun.jvm.hotspot.debugger.linux.LinuxAddress.getCIntegerAt(LinuxAddress.java:69)
    at sun.jvm.hotspot.utilities.CStringUtilities.getString(CStringUtilities.java:61)
    at sun.jvm.hotspot.HotSpotTypeDataBase.readVMTypes(HotSpotTypeDataBase.java:128)
    at sun.jvm.hotspot.HotSpotTypeDataBase.<init>(HotSpotTypeDataBase.java:85)
    at sun.jvm.hotspot.bugspot.BugSpotAgent.setupVM(BugSpotAgent.java:568)
    at sun.jvm.hotspot.bugspot.BugSpotAgent.go(BugSpotAgent.java:494)
    at sun.jvm.hotspot.bugspot.BugSpotAgent.attach(BugSpotAgent.java:348)
    at sun.jvm.hotspot.tools.Tool.start(Tool.java:169)
    at sun.jvm.hotspot.tools.HeapDumper.main(HeapDumper.java:77)
    ... 6 more

我尝试在网上查找，但找不到任何东西。任何指针？

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