apache - tomcat8 启动时报错

Question

**求大神们帮助，
我的项目是在tomcat6的环境下开发的，并在tomcat6上面部署的
现在想换成版本较新的服务器tomcat8
现在在ubuntu的环境下部署好了tomcat8之后，可以登录tomcat的管理首页
我把编译好的项目放在webapps下面重新启动tomcat的时候出现了以下错误，希望大神指点一下，十分感谢。**

15-Apr-2016 16:56:01.916 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /home/lee/taskmgr/apache-tomcat-8/webapps/ai
15-Apr-2016 16:56:02.383 SEVERE [localhost-startStop-1] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start: 
 org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ai]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1101)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1786)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [org.apache.catalina.webresources.StandardRoot@695cc4e]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4845)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4975)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        ... 10 more
Caused by: org.apache.catalina.LifecycleException: Failed to initialize component [org.apache.catalina.webresources.JarResourceSet@3b83cbac]
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:106)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139)
        at org.apache.catalina.webresources.StandardRoot.startInternal(StandardRoot.java:699)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        ... 13 more
Caused by: java.lang.IllegalArgumentException: java.util.zip.ZipException: invalid LOC header (bad signature)
        at org.apache.catalina.webresources.JarResourceSet.initInternal(JarResourceSet.java:96)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
        ... 16 more
Caused by: java.util.zip.ZipException: invalid LOC header (bad signature)
        at java.util.zip.ZipFile.read(Native Method)
        at java.util.zip.ZipFile.access$1400(ZipFile.java:60)
        at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:716)
        at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:419)
        at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
        at sun.misc.IOUtils.readFully(IOUtils.java:65)
        at java.util.jar.JarFile.getBytes(JarFile.java:425)
        at java.util.jar.JarFile.getManifestFromReference(JarFile.java:193)
        at java.util.jar.JarFile.getManifest(JarFile.java:180)
        at org.apache.catalina.webresources.JarResourceSet.initInternal(JarResourceSet.java:94)
        ... 17 more

15-Apr-2016 16:56:02.388 SEVERE [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Error deploying web application directory /home/lee/taskmgr/apache-tomcat-8/webapps/ai
 java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ai]]
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1101)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1786)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

15-Apr-2016 16:56:02.393 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /home/lee/taskmgr/apache-tomcat-8/webapps/ai has finished in 475 ms

Answer 1

The problem has been solved. It was caused by jar package conflicts. There is no effective way to solve this kind of problems. We can only eliminate them one by one. You should use Maven when creating projects in the future. This kind of problem will not occur.