"Loader constraint violation" when trying to add a member to a team

2015-10-08 16:54:31,043 http-nio-8711-exec-24 ERROR jpalharini 1014x912x1 t2a0nn 0:0:0:0:0:0:0:1 /rest/roadmap/1.0/plans/1/users.json [c.a.p.r.c.error.jersey.ThrowableExceptionMapper] Uncaught exception thrown by REST service: loader constraint violation: when resolving method "com.atlassian.jira.bc.user.search.UserSearchParams$Builder.filter(Lcom/google/common/base/Predicate;)Lcom/atlassian/jira/bc/user/search/UserSearchParams$Builder;" the class loader (instance of org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5) of the current class, com/atlassian/jpo/jira/api/user/UserSearchServiceBridge70, and the class loader (instance of org/apache/catalina/loader/WebappClassLoader) for the method's defining class, com/atlassian/jira/bc/user/search/UserSearchParams$Builder, have different Class objects for the type com/google/common/base/Predicate used in the signature
java.lang.LinkageError: loader constraint violation: when resolving method "com.atlassian.jira.bc.user.search.UserSearchParams$Builder.filter(Lcom/google/common/base/Predicate;)Lcom/atlassian/jira/bc/user/search/UserSearchParams$Builder;" the class loader (instance of org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5) of the current class, com/atlassian/jpo/jira/api/user/UserSearchServiceBridge70, and the class loader (instance of org/apache/catalina/loader/WebappClassLoader) for the method's defining class, com/atlassian/jira/bc/user/search/UserSearchParams$Builder, have different Class objects for the type com/google/common/base/Predicate used in the signature
	at com.atlassian.jpo.jira.api.user.UserSearchServiceBridge70.findUsersByName(UserSearchServiceBridge70.java:43)
	at com.radiantminds.roadmap.jira.common.components.extension.users.JiraUserExtension.listUsers(JiraUserExtension.java:222)
	at com.radiantminds.roadmap.common.rest.services.persons.PlanUserServiceHandler$Impl.listAllUsersWithPost(PlanUserServiceHandler.java:94)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	... 1 filtered
	at java.lang.reflect.Method.invoke(Method.java:497)
	at com.radiantminds.roadmap.common.handlers.SecuredInvocationHandler.invoke(SecuredInvocationHandler.java:159)
	at com.sun.proxy.$Proxy3216.listAllUsersWithPost(Unknown Source)
	at com.radiantminds.roadmap.common.rest.services.persons.PlanUserService.listAllUsersWithPost(PlanUserService.java:56)
	... 3 filtered
	at java.lang.reflect.Method.invoke(Method.java:497)
	... 18 filtered
	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:178)
	... 1 filtered
	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:73)
	... 36 filtered
	at com.atlassian.plugins.cors.CorsFilter.doFilter(CorsFilter.java:65)
	... 64 filtered
	at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:40)
	... 73 filtered
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)