Tomcat报错:this web application instance has been stopped already

重启tomcat的时候出错

Illegal access: this web application instance has been stopped already.  Could not load oracle.net.mesg.Message.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.

原因是因为在tomcat重启的时候，之前的tomcat的线程还没有完全关闭，最新启动tomcat就会报这个异常，只要把tomcat的server.xml 中的reloadable="true" 改成false就OK

  </Service>
    <Service name="Catalina">
    <Connector port="8086" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
	
    <Connector port="9003" protocol="AJP/1.3" redirectPort="8443" />

    <Engine name="Catalina" defaultHost="localhost">

      <Realm className="org.apache.catalina.realm.LockOutRealm">
       
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>

      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
<Context docBase="Helloword" path="" workDir="work/Catalina1/localhost/Helloword" reloadable="true"/>
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log." suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />
      </Host>
    </Engine>
  </Service>

 

Context(表示一个web应用程序，通常为WAR文件，关于WAR的具体信息见servlet规范)	docBase	应用程序的路径或者是WAR文件存放的路径
	path	表示此web应用程序的url的前缀，这样请求的url为http://localhost:8080/path/****
	reloadable	这个属性非常重要，如果为true，则tomcat会自动检测应用程序的/WEB-INF/lib 和/WEB-INF/classes目录的变化，自动装载新的应用程序，我们可以在不重起tomcat的情况下改变应用程序

 

其中

 

  <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log." suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />

的含义参见如下文章 

https://www.cnblogs.com/yangxia-test/p/4444294.html