Ubuntu11.10下解决 jmap等jdk工具attach pid错误

 1.错误案例

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nathan@ubuntu:~/Downloads$ jmap -heap 3991
Attaching to process ID 3991, please wait...
Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process

 

2.解决方案

1）修改/etc/sysctl.d/10-ptrace.conf文件如下：

< kernel.yama.ptrace_scope = 1
---
> kernel.yama.ptrace_scope = 0

（即将1改成0）

2）重启

3.成功