TOMCAT为多个web应用启动多个端口

Posted 2020-11-02 zeroisbug

tomcat的启动配置文件在 tomcat/conf/server.xml , 默认配置了一个service：

<?xml version="1.0" encoding="UTF-8"?>

<Server port="8005" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
  
  <GlobalNamingResources>

    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>

  <Service name="Catalina">
    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <Connector port="8009" 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">
        <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" />
        <Context docBase="" path="" />
      </Host>
    </Engine>
  </Service>
</Server>

当然，host里面的Context元素是我配置web项目加上的，docBase属性值指向需要启动的web应用，path属性的值规定访问的路径命名空间，我习惯置为空字符串

<Context docBase="" path="" />

现在需要两个应用，需要再配置一个Service，需要保证Service的name属性不相同，同时保证两个子元素Connector的HTTP的端口和AJP的监听端口跟上一个应用的端口不冲突

添加的另一个Service配置如下，

  <Service name="ZeroHome">
    <Connector port="8088" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8444" />
    <Connector port="8010" 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">
        <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" />
        <Context docBase="" path="" />
      </Host>
    </Engine>
  </Service>

然而，两个web应用确实都启动起来了，观察日志文件却有一条报错信息

SEVERE: Creation of the naming context failed: [javax.naming.OperationNotSupportedException: Context is read only]

试了几次之后发现
把 Engine 元素的name属性改成跟第一个不同之后，报错消失，两个web启动成功

<Engine name="Catalina2" defaultHost="localhost">

报错的具体原因还在寻找