Tomcat启动问题

1)ClassNotFoundException (检测maven配置，然后重新maven update)
2)端口号(例如8080)被占用了(关闭tomcat或杀死进程)
2Mutiple Contents have a path of XXX(检测Eclipse下的server.xml是否有重名项目配置)
3A child container failded during start. (LifeCycleException-异常)(检测web.xml的配置)

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package org.apache.catalina;


/**
 * General purpose exception that is thrown to indicate a lifecycle related
 * problem.  Such exceptions should generally be considered fatal to the
 * operation of the application containing this component.
 *
 * @author Craig R. McClanahan
 */
public final class LifecycleException extends Exception {

    private static final long serialVersionUID = 1L;

    //------------------------------------------------------------ Constructors


    /**
     * Construct a new LifecycleException with no other information.
     */
    public LifecycleException() {
        super();
    }


    /**
     * Construct a new LifecycleException for the specified message.
     *
     * @param message Message describing this exception
     */
    public LifecycleException(String message) {
        super(message);
    }


    /**
     * Construct a new LifecycleException for the specified throwable.
     *
     * @param throwable Throwable that caused this exception
     */
    public LifecycleException(Throwable throwable) {
        super(throwable);
    }


    /**
     * Construct a new LifecycleException for the specified message
     * and throwable.
     *
     * @param message Message describing this exception
     * @param throwable Throwable that caused this exception
     */
    public LifecycleException(String message, Throwable throwable) {
        super(message, throwable);
    }
}