[CLOUDSTACK-7563] ClassCastException in VirtualMachineManagerImpl in handling various Agent command answer.

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 4.3.0
• Fix Version/s: 4.5.0
• Component/s: Management Server
• Security Level: Public (Anyone can view this level - this is the default.)
• Assignee: Min Chen
• Reporter: Min Chen
• Created: 16/Sep/14 17:27
• Updated: 02/Dec/14 11:16
• Resolved: 16/Sep/14 21:02

Description

irtualMachineManagerImpl has many methods directly cast the Answer received from AgentManager.send or AgentManager.easySend to the expected Answer class in the normal case. This will throw unhandled ClassCastException in some unexcepted cases where host is down and agent is disconnected, which will lead to cloud instability.