快速解决Tomcat重新配置后启动慢的问题

jenkins+tomcat服务器配置过程中，修改了tomcat配置文件；然后再访问服务器的tomcat页面发现根本加载不出来

企图重启tomcat

/opt/tomcat/bin/shutdown.sh

出现如下报错

[root@izbp1fmfc2pdjiw9u143xfz conf]# /opt/tomcat/bin/shutdown.sh using catalina_base: /opt/tomcat using catalina_home: /opt/tomcat using catalina_tmpdir: /opt/tomcat/temp using jre_home: /usr/lib/jvm/java-1.8.0-openjdk using classpath: /opt/tomcat/bin/bootstrap.jar:/opt/tomcat/bin/tomcat-juli.jar 二月 20, 2020 1:37:22 下午 org.apache.catalina.startup.catalina stopserver 严重: could not contact [localhost:8005]. tomcat may not be running. 二月 20, 2020 1:37:22 下午 org.apache.catalina.startup.catalina stopserver 严重: catalina.stop: java.net.connectexception: 拒绝连接 (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:607) at java.net.socket.connect(socket.java:556) at java.net.socket.<init>(socket.java:452) at java.net.socket.<init>(socket.java:229) at org.apache.catalina.startup.catalina.stopserver(catalina.java:504) 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:389) at org.apache.catalina.startup.bootstrap.main(bootstrap.java:479)

经查证，出现这种报错的原因是tomcat尚未启动完成；

接下来尝试了强制关闭tomcat

ps -ef | grep tomcat 查看tomcat进程号
kill -9 + 进程号 杀死进程

重新启动tomcat

/opt/tomcat/bin/startup.sh

tomcat页面依旧无法加载

打印tomcat运行日志

[root@izbp1fmfc2pdjiw9u143xfz conf]# cd /opt/tomcat [root@izbp1fmfc2pdjiw9u143xfz tomcat]# ls bin building.txt conf contributing.md lib license logs notice readme.md release-notes running.txt temp webapps work [root@izbp1fmfc2pdjiw9u143xfz tomcat]# cd logs [root@izbp1fmfc2pdjiw9u143xfz logs]# ls catalina.2020-02-20.log host-manager.2020-02-20.log localhost_access_log.2020-02-20.txt catalina.out localhost.2020-02-20.log manager.2020-02-20.log [root@izbp1fmfc2pdjiw9u143xfz logs]# tail -f catalina.out 20-feb-2020 13:48:35.239 信息 [main] org.apache.catalina.startup.versionloggerlistener.log command line argument: -dcatalina.base=/opt/tomcat 20-feb-2020 13:48:35.239 信息 [main] org.apache.catalina.startup.versionloggerlistener.log command line argument: -dcatalina.home=/opt/tomcat 20-feb-2020 13:48:35.239 信息 [main] org.apache.catalina.startup.versionloggerlistener.log command line argument: -djava.io.tmpdir=/opt/tomcat/temp 20-feb-2020 13:48:35.239 信息 [main] org.apache.catalina.core.aprlifecyclelistener.lifecycleevent the apr based apache tomcat native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib] 20-feb-2020 13:48:35.348 信息 [main] org.apache.coyote.abstractprotocol.init 初始化协议处理器 ["http-nio-8080"] 20-feb-2020 13:48:35.391 信息 [main] org.apache.tomcat.util.net.nioselectorpool.getsharedselector using a shared selector for servlet write/read 20-feb-2020 13:48:35.403 信息 [main] org.apache.catalina.startup.catalina.load initialization processed in 895 ms 20-feb-2020 13:48:35.487 信息 [main] org.apache.catalina.core.standardservice.startinternal starting service [catalina] 20-feb-2020 13:48:35.487 信息 [main] org.apache.catalina.core.standardengine.startinternal starting servlet engine: apache tomcat/8.5.51 20-feb-2020 13:48:35.524 信息 [localhost-startstop-1] org.apache.catalina.startup.hostconfig.deploydirectory 把web 应用程序部署到目录 [/opt/tomcat/webapps/docs]

发现运行日志卡在最后一行：localhost-startstop-1，无法向下继续进行

解决方案：

将$ java_home / jre / lib / security / java.security文件中的securerandom.source参数修改为文件：/ dev /./ urandom

[root@izbp1fmfc2pdjiw9u143xfz logs]# cd $java_home/jre/lib/security
[root@izbp1fmfc2pdjiw9u143xfz security]# ls
blacklisted.certs cacerts java.policy java.security nss.cfg policy
[root@izbp1fmfc2pdjiw9u143xfz security]# vi java.security

顺带一提，在vi中快速搜索的方法：

命令模式下输入“/字符串”，例如“/section 3”。如果查找下一个，按“n”即可。

总结

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