背景：

在Linux中的启动Tomcat的时候无异常，但是通过脚本文件关闭Tomcat的时候，出现异常

./shutdown.sh

异常信息

SEVERE: Could not contact localhost:8005. Tomcat may not be running.
Jul 20, 2018 3:17:45 PM org.apache.catalina.startup.Catalina stopServer
SEVERE: Catalina.stop: 
java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSoc
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.j
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at java.net.Socket.<init>(Socket.java:434)
    at java.net.Socket.<init>(Socket.java:211)
    at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:498)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorIm
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAc
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:34
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:430)

信息显示端口8005没有启动，同时命令查看进程端口

[root@iz2zef1jdvksldmo6hv6xez security]# netstat -tunlp|grep 8005
[root@iz2zef1jdvksldmo6hv6xez security]# netstat -tunlp|grep 8080

结果显示：8080启动，但是8005没有启动

解决

$JAVA_HOME/jre/lib/security/Java.security 文件中 securerandom.source 配置项

securerandom.source=file:/dev/random
改为：
securerandom.source=file:/dev/urandom

补充：vim中的快捷键

:/securerandom(检索关键字securerandom)
按u查找下一个关键字

修改完成后：如果8080端口已经启动了先，kill掉

kill -9 进程号

重新启动，检查是否启动成功