Ubuntu下jmap，jinfo Can't attach to the process

1.错误

Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process
sun.jvm.hotspot.debugger.DebuggerException: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process

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

Oracle Bug ID：http://bugs.java.com/bugdatabase/view_bug.do?bug_id=7050524