It seems that this error is caused by guava libraries release used by jcloud: guava-15.0.jar.So I've tried to change guava-15.0.jar whit guava release 16.0-rc1.
Unfortunately, jclouds 1.7.0 is compatible with 16.0 (see the release notes [1]). This will be fixed in 1.7.1.
ap [1] http://jclouds.apache.org/documentation/releasenotes/1.7/
