Monthly Archives: September 2009

Tomcat fails to start a struts 2 webapp (SEVERE: Error filterStart)

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The problem

The following will usually be displayed in the catalina.out log

	Sep 23, 2009 7:57:15 AM org.apache.catalina.core.StandardContext start
	SEVERE: Error filterStart
	Sep 23, 2009 7:57:15 AM org.apache.catalina.core.StandardContext start
	SEVERE: Context [/OfficeMAWeb] startup failed due to previous errors

The solution

This is usually due to conflicting struts 2 jar files in the webapp lib folder, the error will be explained in details in the localhost<date>.log, in my case I had both struts2-core-2.1.6.jar and struts2-core-2.0.12.jar in the lib folder

INFO: Initializing Spring root WebApplicationContext
Sep 23, 2009 7:51:09 AM org.apache.catalina.core.StandardContext filterStart

SEVERE: Exception starting filter struts2
Unable to load bean: type: class:com.opensymphony.xwork2.ObjectFactory - bean -
jar:file:/home/omerio/apache-tomcat-6.0.20/webapps/OfficeMAWeb/WEB-INF/lib/struts2-core-2.1.6.jar!/
struts-default.xml:29:72
       at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:208)
        at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
       at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:131)
        at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52)
       at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395)
        at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452)
       at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:203)
        at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
       at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
        at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
       at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3800)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4450)
       at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
       at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:850)
       at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:724)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:493)
       at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1206)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:314)
       at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
       at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
       at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
        at org.apache.catalina.core.StandardService.start(StandardService.java:516)
       at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
       at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: Bean type class com.opensymphony.xwork2.ObjectFactory with the name

xwork has already been loaded by bean - jar:file:/home/omerio/apache-tomcat-6.0.20/

webapps/OfficeMAWeb/WEB-INF/lib/struts2-core-2.0.12.jar!/struts-default.xml:30:72 - bean - jar:file:/home/omerio/apache-tomcat-6.0.20
/webapps/OfficeMAWeb/WEB-INF/lib/struts2-core-2.1.6.jar!/struts-default.xml:29:72
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register

(XmlConfigurationProvider.java:193)
Sep 23, 2009 7:51:09 AM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext