Greenhouse - javax/el/ExpressionFactory - LinkageError

When trying to load Greenhouse c4a1555 in an STS server:
- STS (2.8.1)
- (via Run-As, run on server)
- VMware vFabric tx Server v2.5 + jre: jdk1.6.0_25 + tomcat-7.0.20.B.RELEASE

I get the following error:

org.springframework.web.util.NestedServletExceptio n: Handler processing failed; nested exception is java.lang.LinkageError: loader constraint violation: loader (instance of org/apache/catalina/loader/WebappClassLoader) previously initiated loading for a different type with name "javax/el/ExpressionFactory"
org.springframework.web.servlet.DispatcherServlet. doDispatch(DispatcherServlet.java:949)
org.springframework.web.servlet.DispatcherServlet. doService(DispatcherServlet.java:827)
org.springframework.web.servlet.FrameworkServlet.p rocessRequest(FrameworkServlet.java:882)

Adding the following to pom solved the exception problem (info may help someone):

Code:

---

                <dependency>
                        <groupId>javax.el</groupId>
                        <artifactId>el-api</artifactId>
                        <version>2.2</version>
                        <scope>provided</scope>                       
                </dependency>

---

This might be due to files cached in your local m2 repository. I think Oracle modified the pom of the above dependency at some point.

Thanks t2987. Just downloaded the spring social quickstart and tried to run tomcat plugin under maven and I got the same error. Very considerate of you to post your solution as I'm sure that it saved me a couple of hours.