剛入行不久的小白一只。
配置環境是：CentOS 7+Tomcat 8
前幾天專案原因需要部署一個war包，測驗一下是否能正常打開。
但很奇怪的是，部署后Tomcat每次手動關閉時就會報以下錯誤：
[root@localhost bin]# ./shutdown.sh
Using CATALINA_BASE: /root/apache-tomcat-9.0.11
Using CATALINA_HOME: /root/apache-tomcat-9.0.11
Using CATALINA_TMPDIR: /root/apache-tomcat-9.0.11/temp
Using JRE_HOME: /usr
Using CLASSPATH: /root/apache-tomcat-9.0.11/bin/bootstrap.jar:/root/apache-tomcat-9.0.11/bin/tomcat-juli.jar
Aug 26, 2019 3:06:19 AM org.apache.catalina.startup.Catalina stopServer
SEVERE: Could not contact [localhost:[8005]]. Tomcat may not be running.
Aug 26, 2019 3:06:19 AM 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.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
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(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:403)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:497)
[root@localhost bin]# ./shutdown.sh
Using CATALINA_BASE: /root/apache-tomcat-9.0.11
Using CATALINA_HOME: /root/apache-tomcat-9.0.11
Using CATALINA_TMPDIR: /root/apache-tomcat-9.0.11/temp
Using JRE_HOME: /usr
Using CLASSPATH: /root/apache-tomcat-9.0.11/bin/bootstrap.jar:/root/apache-tomcat-9.0.11/bin/tomcat-juli.jar
Aug 26, 2019 3:06:19 AM org.apache.catalina.startup.Catalina stopServer
SEVERE: Could not contact [localhost:[8005]]. Tomcat may not be running.
Aug 26, 2019 3:06:19 AM 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.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
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(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:403)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:497)
而且網頁顯示“無法訪問此網站”
能確定的是，在部署war包之前，Tomcat是沒有問題的。
于是我在網上找解決方案找了很久，大部分說是因為8005埠啟動太慢了（計算亂數時阻塞）
解決方法是修改java.security這個檔案，將securerandom.source這項改為：
securerandom.source=file：/dev/./urandom
就好了。
然而我試了試發現還是不行...
于是為了這個問題弄了兩天還是沒搞明白，郁悶了很久。
直到有一天我把虛擬機網路配接器的連接模式由NAT模式改成了橋接模式并復制物理網路連接狀態。
這個問題就解決了
現在我還是一臉懵，至今都不知道為什么會這樣。
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