Why fabric broker view in hawtio is not working after patching to Fuse R2 ?

Issue

• In an un-patched Fuse 6.1.0 Fabric, The Hawtio console shows the A-MQ brokers and broker groups in the hawtio runtime MQ page. But after applying the rollup 2 patch (jboss-fuse-6.1.0.redhat-379-r2-611423.zip) to the whole Fabric, the runtime MQ page says that "There are no brokers configured in this Fabric".
• After downgrading it back just the broker containers to 6.1.0, they become visible again in Hawtio again.
• This behaviour is visible even after upgrading to the latest patch R2P3 (jboss-fuse-6.1.0.redhat-379-r2p3-611431.zip), but the results are the same.