a427b021_Rebuild_Status___FedoraProject__Issue
[Explanation] Java 6 and lower used to provide tools.jar on the classpath by default. Java 7 no longer does it, and as a result, error related to missing classes (that exist in tools.jar) are seen. [How to fix] The package should be patched to supply tools.jar when building, and to ensure that tools.jar is on run-time classpath if it is needed during runtime as well. [Issue] 
Needs tools.jar in build/runtime classpath
Java7 Package Rebuild Status - FedoraProject
Issue