在Apache上部署WAR文件-不工作

Question

我使用Eclipse在Java中实现了一个API，并以war文件的形式导出了它。它在我开发的系统上运行得很好。

这是web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Favorite-API</display-name>
  <servlet>
    <servlet-name>Favorite-API</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <init-param>
      <param-name>com.sun.jersey.config.property.packages</param-name>
      <param-value>favorite.api</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Favorite-API</servlet-name>
    <url-pattern>/rest-videos/*</url-pattern>
  </servlet-mapping>
</web-app>

现在，我想在(另一个系统)上部署API。因此，我将war文件部署到另一台机器的Apache服务器上，遵循给定的这里步骤。

但是，在运行API时，我会得到以下错误：

HTTP Status 500 -   
________________________________


type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: Servlet.init() for servlet Favorite-API threw exception
  org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
  org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
  org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
  org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
  org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
  org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
  org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
  java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
  java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  java.lang.Thread.run(Unknown Source)


root cause 

java.lang.NoClassDefFoundError: org/objectweb/asm/ClassVisitor
  com.sun.jersey.api.core.ScanningResourceConfig.init(ScanningResourceConfig.java:79)
  com.sun.jersey.api.core.PackagesResourceConfig.init(PackagesResourceConfig.java:104)
  com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:78)
  com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:89)
  com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:696)
  com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:674)
  com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:205)
  com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:376)
  com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:559)
  javax.servlet.GenericServlet.init(GenericServlet.java:160)
  org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
  org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
  org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
  org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
  org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
  org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
  org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
  java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
  java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  java.lang.Thread.run(Unknown Source)


root cause 

java.lang.ClassNotFoundException: org.objectweb.asm.ClassVisitor
  org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
  org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
  com.sun.jersey.api.core.ScanningResourceConfig.init(ScanningResourceConfig.java:79)
  com.sun.jersey.api.core.PackagesResourceConfig.init(PackagesResourceConfig.java:104)
  com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:78)
  com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:89)
  com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:696)
  com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:674)
  com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:205)
  com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:376)
  com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:559)
  javax.servlet.GenericServlet.init(GenericServlet.java:160)
  org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
  org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
  org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
  org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
  org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
  org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
  org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
  java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
  java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  java.lang.Thread.run(Unknown Source)


note The full stack trace of the root cause is available in the Apache Tomcat/7.0.27 logs.

出什么问题了？有什么帮助吗。

Answer 1

类路径中可能缺少一些依赖项。

java.lang.NoClassDefFoundError: org/objectweb/asm/ClassVisitor

假设开发tomcat有这个类/包，而不是部署war的tomcat中。

Answer 2

servlet未找到的类def意味着tomcat经常可用的servlet由于某种原因而丢失。可能tomcat的lib文件夹中的jar文件(可能是tomcat lib文件夹中的其他jar文件)已经损坏或删除。这两种情况有时都发生在我身上，有坏的虚拟机要处理，磁盘失败，或者基于maven的构建过程会将附加的api部署到lib文件夹，并在复制新lib文件之前删除其中的内容。

Answer 3

似乎您丢失了$TOMCAT_HOME/lib目录中的ObjectWeb ASM工件。