Upgrade the RichFaces guava dependency to version 15.0 ------------------------------------------------------ Key: RF-13247 URL: https://issues.jboss.org/browse/RF-13247 Project: RichFaces Issue Type: Component Upgrade Security Level: Public(Everyone can see) Components: third-party Reporter: Jeremy Landis Priority: Minor Fix For: 4.3.5 Upgrading to guava 15 from 14.0.1 causes this richfaces error. I have not looked into this further but wanted to put it out there as an issue. Caused by: java.lang.IllegalAccessError: tried to access method com.google.common.collect.MapMaker.makeComputingMap(Lcom/google/common/base/Function;)Ljava/util/concurrent/ConcurrentMap; from class org.richfaces.resource.ResourceLibraryFactoryImpl