This release is a bug fix release. Due to the nature of the bug, both the main branch as well as the 4.7.x branch (for java 1.6) have been updated.
The bug is rare but can happen while upgrading glu: it manifests itself by bad data being written to ZooKeeper (only when the agent cannot instantiate a previously deployed glu script) and the console does not handle it properly. The fix is 2 fold:
fixed the agent to not write bad data in ZooKeeper
fixed the console to handle improper data in ZooKeeper
Fixed glu-262: A bad agent should not bring the console down