ClassNotFoundException : org.jboss.resteasy.plugins.providers.multipart.MultipartInput

Question

Working REST + file upload, using resteasy 2.2.1.GA and Eclipse 3.6. And the reseteasy multipart dependency is declared in maven pom.xml file.

In compile mode, class “MultipartInput” is able to compile, but Eclipse prompts following error message during deployment or debugging mode?

java.lang.NoClassDefFoundError: org/jboss/resteasy/plugins/providers/multipart/MultipartInput
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Caused by: java.lang.ClassNotFoundException: 
        org.jboss.resteasy.plugins.providers.multipart.MultipartInput

	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1516)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1361)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
	... 29 more

Solution

In Maven + Eclipse development, double confirm that the “resteasy-multipart-provider” is declared in Maven pom.xml file properly.

File : pom.xml

	<dependency>
		<groupId>org.jboss.resteasy</groupId>
		<artifactId>resteasy-multipart-provider</artifactId>
		<version>2.2.1.GA</version>
	</dependency>

Issue below Maven command to make sure all dependencies are deployed during Eclipse debugging environment.

mvn eclipse:eclipse -Dwtpversion=2.0