我在localhost上开发了Web应用程序，它工作正常。但是当我在服务器上部署它时，当我尝试创建用户时，它给我带来了内部服务器错误
当我使用 .//catalina.sh 运行运行它时，我得到了这个
12-May-2018 22:48:17.984 INFO [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/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib]
12-May-2018 22:48:18.236 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"]
12-May-2018 22:48:18.266 SEVERE [main] org.apache.catalina.core.StandardService.initInternal Failed to initialize connector [Connector[HTTP/1.1-8080]]
org.apache.catalina.LifecycleException: Failed to initialize component [Connector[HTTP/1.1-8080]]
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:112)
at org.apache.catalina.core.StandardService.initInternal(StandardService.java:549)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:875)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
at org.apache.catalina.startup.Catalina.load(Catalina.java:632)
at org.apache.catalina.startup.Catalina.load(Catalina.java:655)
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.load(Bootstrap.java:309)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492)
Caused by: org.apache.catalina.LifecycleException: Protocol handler initialization failed
at org.apache.catalina.connector.Connector.initInternal(Connector.java:995)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
... 12 more
Caused by: java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:433)
at sun.nio.ch.Net.bind(Net.java:425)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:210)
at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:1086)
at org.apache.tomcat.util.net.AbstractJsseEndpoint.init(AbstractJsseEndpoint.java:268)
at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:581)
at org.apache.coyote.http11.AbstractHttp11Protocol.init(AbstractHttp11Protocol.java:68)
at org.apache.catalina.connector.Connector.initInternal(Connector.java:993)
... 13 more
12-May-2018 22:48:18.279 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"]
12-May-2018 22:48:18.284 SEVERE [main] org.apache.catalina.core.StandardService.initInternal Failed to initialize connector [Connector[AJP/1.3-8009]]
org.apache.catalina.LifecycleException: Failed to initialize component [Connector[AJP/1.3-8009]]
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:112)
at org.apache.catalina.core.StandardService.initInternal(StandardService.java:549)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:875)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
at org.apache.catalina.startup.Catalina.load(Catalina.java:632)
at org.apache.catalina.startup.Catalina.load(Catalina.java:655)
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.load(Bootstrap.java:309)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492)
Caused by: org.apache.catalina.LifecycleException: Protocol handler initialization failed
at org.apache.catalina.connector.Connector.initInternal(Connector.java:995)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
... 12 more
Caused by: java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:433)
at sun.nio.ch.Net.bind(Net.java:425)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:210)
at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:1086)
at org.apache.tomcat.util.net.AbstractJsseEndpoint.init(AbstractJsseEndpoint.java:268)
at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:581)
at org.apache.catalina.connector.Connector.initInternal(Connector.java:993)
... 13 more
地址在这里 http://128.199.228.4:8080/kuapp
开机自检方法：http://128.199.228.4:8080/kuapp/users 使用出现内部服务器错误的 JSON 内容
{
"firstName": "Pakanon",
"lastName": "Pantisawat",
"email": "pakanon.pk@gmail.com",
"password": "12345678",
"userId": "b6010546891",
"role": "student"
}
GET 方法：http://128.199.228.4:8080/kuapp/users 这是工作，但数据库中没有任何内容，因此它将返回空数组
在异常堆栈中，您可以看到：
Caused by: java.net.BindException: Address already in use
这意味着 Tomcat 绑定到的端口已被其他进程使用。Tomcat 使用的默认端口是 8080。
您必须终止其他进程或更改 Tomcat 使用的端口。您可以更改端口编辑conf/server.xml文件，将 8080 替换为所需的端口，例如，将 Tomcat 设置为使用端口 8081：
<Connector port="8081" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
它是由代码中的未知异常引起的。