Tomcat 9.0.16：无法初始化组件[Connector[HTTP/1.1-8080]]

Question

最近我下载了 JDK 11.0.2 和 Tomcat 9.0.16 并设置了环境变量，但是每当我启动 tomcat 时，它都会在控制台中显示以下异常，并且无法访问 http://localhost:8080/ 。 请帮忙。

    06-Mar-2019 03:34:43.186 SEVERE [main] org.apache.catalina.util.LifecycleBase.handleSubClassException Failed to initialize component [Connector[HTTP/1.1-8080]] org.apache.catalina.LifecycleException: Protocol handler initialization failed
    at org.apache.catalina.connector.Connector.initInternal(Connector.java:983)
    at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136)
    at org.apache.catalina.core.StandardService.initInternal(StandardService.java:535)
    at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136)
    at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:1055)
    at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:589)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:612)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:306)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:491)
Caused by: java.io.IOException: Unable to establish loopback connection
    at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:94)
    at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:61)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/sun.nio.ch.PipeImpl.<init>(PipeImpl.java:171)
    at java.base/sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
    at java.base/java.nio.channels.Pipe.open(Pipe.java:155)
    at java.base/sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
    at java.base/sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
    at java.base/java.nio.channels.Selector.open(Selector.java:295)
    at org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector(NioSelectorPool.java:54)
    at org.apache.tomcat.util.net.NioSelectorPool.close(NioSelectorPool.java:109)
    at org.apache.tomcat.util.net.NioEndpoint.unbind(NioEndpoint.java:338)
    at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1090)
    at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:1098)
    at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:557)
    at org.apache.coyote.http11.AbstractHttp11Protocol.init(AbstractHttp11Protocol.java:74)
    at org.apache.catalina.connector.Connector.initInternal(Connector.java:980)
    ... 13 more
Caused by: java.net.ConnectException: Connection timed out: connect
    at java.base/sun.nio.ch.Net.connect0(Native Method)
    at java.base/sun.nio.ch.Net.connect(Net.java:482)
    at java.base/sun.nio.ch.Net.connect(Net.java:474)
    at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:694)
    at java.base/java.nio.channels.SocketChannel.open(SocketChannel.java:194)
    at java.base/sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:127)
    at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:76)
    ... 29 more

我还尝试了不同的连接器端口，但没有成功，但是当我在另一台机器上尝试使用相同的配置进行相同的操作时，它毫无例外地工作并且可以访问本地主机。我的机器有问题吗

Answer 1

此错误表示您的端口正忙。

1. 停止 Tomcat
   
2. 更改端口号
   
3. 重新启动您的应用程序
   

在此处阅读有关错误的更多信息

Answer 2

停止tomcat 执行 ps -ef|grep tomcat 查看是否有旧的 tomcat 正在运行。 （发生在我身上） 杀死-9 pid