问题描述

求教：maven工程部署到tomcat出现问题

八月 20, 2015 2:37:39 下午 org.apache.catalina.startup.Catalina start
SEVERE: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 9 more
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more

八月 20, 2015 2:37:39 下午 org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-apr-8080"]
八月 20, 2015 2:37:39 下午 org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-apr-8009"]
八月 20, 2015 2:37:39 下午 org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
八月 20, 2015 2:37:39 下午 org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-apr-8080"]
八月 20, 2015 2:37:39 下午 org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-apr-8009"]
八月 20, 2015 2:37:39 下午 org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
2015-08-20 14:37:39 [INFO] org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:862) : Closing Root WebApplicationContext: startup date [Thu Aug 20 14:37:19 CST 2015]; root of context hierarchy
八月 20, 2015 2:37:39 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [/emp] registered the JDBC driver [oracle.jdbc.driver.OracleDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
八月 20, 2015 2:37:39 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/emp] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak.

解决方案

关于maven工程部署在tomcat上的问题
Maven远程部署web工程到Tomcat7中
IDEA + Tomcat + Maven + Web工程打包部署

解决方案二：

导致上面的原因可能有多种情况。
你直接通过 maven打包成 war包（mvn clean install） 放到tomcat中能运行。如果能运行则可能是你IDE环境的问题，那么分别清理下项目和tomcat。

如果打包都不成功，则需要注意pom.xml文件，根据具体错误再找问题了