Spring context:component-scan casting exception

Question

I have a strange error which I searched about alot on the internet. I could not figure it why I am getting this error. I found some explanations about that error on spring jira. I have context:component-scan in applicationContext.xml and I defines 5 packages in com.sow.webservices package. However when I add the controller package including controller classes, I throws

Error occured processing XML '[Ljava.lang.String; cannot be cast to java.lang.String'. See Error Log for more details

This is component-scan:

<context:component-scan base-package="com.sow.webservices.aop, 
                                          com.sow.webservices.exceptions,
                                          com.sow.webservices.models, 
                                          com.sow.webservices.services,
                                          com.sow.webservices.controller">

I would like to show you whole exception trace. Appreciate for your help.

!ENTRY org.springframework.ide.eclipse.beans.core 1 0 2014-04-11 18:07:39.996
!MESSAGE Error occured processing '/SOW_WS/src/main/webapp/WEB-INF/applicationContext.xml'
!STACK 0
java.lang.ClassCastException: [Ljava.lang.String; cannot be cast to java.lang.String
    at org.springframework.context.annotation.AnnotationBeanNameGenerator.determineBeanNameFromAnnotation(AnnotationBeanNameGenerator.java:92)
    at org.springframework.context.annotation.AnnotationBeanNameGenerator.generateBeanName(AnnotationBeanNameGenerator.java:70)
    at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:247)
    at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:85)
    at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:74)
    at org.springframework.ide.eclipse.beans.core.internal.model.namespaces.DelegatingNamespaceHandlerResolver$ElementTrackingNamespaceHandler.parse(DelegatingNamespaceHandlerResolver.java:177)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1427)
    at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$ErrorSuppressingBeanDefinitionParserDelegate.parseCustomElement(BeansConfig.java:1400)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1417)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:187)
    at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$ToolingFriendlyBeanDefinitionDocumentReader.doRegisterBeanDefinitions(BeansConfig.java:1330)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:110)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:494)
    at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$2.registerBeanDefinitions(BeansConfig.java:402)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:391)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:335)
    at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$2.loadBeanDefinitions(BeansConfig.java:388)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303)
    at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$3.call(BeansConfig.java:445)
    at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$3.call(BeansConfig.java:1)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Even if xml throws this exception I can run my application, but when I remove com.sow.webservices.controller it stops showing there is mistake sign but it gives 404 error. Since I am in trouble with component-scan, LocaleChangeInterceptor is not working and I can not internationalize my application

Just a thought, if these are the 5 packages you have and no filters, why don't you keep base package as "com.sow.webservices" instead of mentioning it all? — Prasad
– Prasad, Commented Apr 11, 2014 at 15:28
What version of Spring are you using? You mentioned Spring JIRA and, yes, there is, indeed, an issue reported and fixed (jira.spring.io/browse/SPR-11221). Have you tried with the Spring versions that fixed that JIRA issue? — Andrei Stefan
– Andrei Stefan, Commented Apr 11, 2014 at 15:30
@Prasad, it is still in development, I may have anohter package containing sometrhing under 'com.sow' instead of 'com.sow.webservices'. AndreiStefan , yes before I was using 4.0.2, But after reading that issue I moved on 4.0.3 — Emilla
– Emilla, Commented Apr 11, 2014 at 15:42

Eric Clarke · Accepted Answer · 2014-05-06 22:32:32Z

5

check your controllers, if one of them uses the annotation @ControllerAdvice try commenting it out and the weird thing is the error goes away. FREAKY!!!!

answered May 6, 2014 at 22:32

Eric Clarke

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3 Comments

Emilla Over a year ago

wouw. you are right. it worked. However this time my app exception can not be catched by a controller which use @ ControllerAdvice and its methods use the @ ExceptionHandler annotation.

matt1616 Over a year ago

nice. this fixed my error which was just slightly different: java.lang.String; incompatible with java.lang.String

Baptiste Gaillard Over a year ago

Ok but we need @ControllerAdvice, do you know how to replace it with an equivalent Spring XML configuration ?

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