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https://issues.apache.org/jira/browse/CLOUDSTACK-7563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Min Chen resolved CLOUDSTACK-7563.
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Resolution: Fixed
Changed VirtualMachineManagerImpl to use check Answer cast to avoid potential
unhandled exception.
> ClassCastException in VirtualMachineManagerImpl in handling various Agent
> command answer.
> -----------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-7563
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-7563
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Management Server
> Affects Versions: 4.3.0
> Reporter: Min Chen
> Assignee: Min Chen
> Priority: Critical
> Fix For: 4.5.0
>
>
> 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.
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