安装
wget --no-check-certificate https://raw.github.com/oldratlee/useful-scripts/release/show-busy-java-threads
chmod +x show-busy-java-threads
./show-busy-java-threads
如果出现如下报错是因为进程不是root启动的，进程是什么用户起的，就用什么用户去跟踪
详见
https://github.com/oldratlee/useful-scripts/blob/master/docs/java.md#beer-show-busy-java-threadssh