title: Exception when taking a heapdump using JMAP
body: <p>I get the following exception when i take a heapdump using </p>
  
  <p><strong>jmap -F -dump:format=b,file=/tmp/heapdump/before.hprof 10737</strong></p>
  
  <pre><code>Attaching to process ID 10737, 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: java.lang.RuntimeException: Type "nmethodBucket*", referenced in VMStructs::localHotSpotVMStructs in the remote VM, was not present in the remote VMStructs::localHotSpotVMTypes table (should have been caught in the debug build of that VM). Can not continue.
      at sun.jvm.hotspot.HotSpotTypeDataBase.lookupOrFail(HotSpotTypeDataBase.java:361)
      at sun.jvm.hotspot.HotSpotTypeDataBase.readVMStructs(HotSpotTypeDataBase.java:252)
      at sun.jvm.hotspot.HotSpotTypeDataBase.&lt;init&gt;(HotSpotTypeDataBase.java:87)
      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:332)
      at sun.jvm.hotspot.tools.Tool.start(Tool.java:163)
      at sun.jvm.hotspot.tools.HeapDumper.main(HeapDumper.java:77)
  </code></pre>
  
  <p>Anyone know how to resolve this ?</p>