Can‘t attach to the process: ptrace(PTRACE_ATTACH, ..)

Bertha 。 2022-11-18 10:55 237阅读 0赞

.因为新版的Linux系统加入了 `ptrace-scope` 机制,该机制的目的是防止用户访问正在执行的进程的内存，但是如jinfo,jmap这些调试类工具本身就是利用`ptrace来获取执行进程的内存等信息。`

Attaching to process ID 21530, please wait...  
Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process: ptrace(PTRACE\_ATTACH, ..) failed for 21530: 不允许的操作  
sun.jvm.hotspot.debugger.DebuggerException: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process: ptrace(PTRACE\_ATTACH, ..) failed for 21530: 不允许的操作  
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:163)  
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:278)  
    at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:671)  
    at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:611)  
    at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:337)  
    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.JInfo.main(JInfo.java:138)  
    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.jinfo.JInfo.runTool(JInfo.java:108)  
    at sun.tools.jinfo.JInfo.main(JInfo.java:76)  
Caused by: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process: ptrace(PTRACE\_ATTACH, ..) failed for 21530: 不允许的操作  
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)  
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$100(LinuxDebuggerLocal.java:62)  
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1AttachTask.doit(LinuxDebuggerLocal.java:269)  
    at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:138)

解决方案:

root@Desktop:/home/appleyuchi\# sysctl -w kernel.yama.ptrace\_scope=0