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在mac上执行命令jmap -heap 96530
报错：
Attaching to process ID 96530, please wait...
ERROR: attach: task_for_pid(96530) failed: '(os/kern) failure' (5)
Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process. Could be caused by an incorrect pid or lack of privileges.
sun.jvm.hotspot.debugger.DebuggerException: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process. Could be caused by an incorrect pid or lack of privileges.at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal$BsdDebuggerLocalWorkerThread.execute(BsdDebuggerLocal.java:169)at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.attach(BsdDebuggerLocal.java:287)at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:671)at sun.jvm.hotspot.HotSpotAgent.setupDebuggerDarwin(HotSpotAgent.java:659)at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:341)at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:304)at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:140)at sun.jvm.hotspot.tools.Tool.start(Tool.java:185)at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)at sun.jvm.hotspot.tools.HeapSummary.main(HeapSummary.java:49)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at sun.tools.jmap.JMap.runTool(JMap.java:201)at sun.tools.jmap.JMap.main(JMap.java:130)
Caused by: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process. Could be caused by an incorrect pid or lack of privileges.at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.attach0(Native Method)at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.access$100(BsdDebuggerLocal.java:65)at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal$1AttachTask.doit(BsdDebuggerLocal.java:278)at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal$BsdDebuggerLocalWorkerThread.run(BsdDebuggerLocal.java:144)
原来是jdk（mac版）的bug：
https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8160376
升级成最新版jdk试试：
依然不管用。
还一不小心把~/.zshrc文件给改坏了，iterm2无法启动。在访达界面，按住“Command + Shift + . ”，显示隐藏文件。
看到隐藏文件，用文本编辑app打开.zshrc，即可编辑。
言归正传，jmap -heap pid，这bug就一直存在？在mac上这命令算不算是弃用了呀？
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