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https://issues.apache.org/jira/browse/CLOUDSTACK-3431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708286#comment-13708286
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Marcus Sorensen commented on CLOUDSTACK-3431:
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I've looked at this issue briefly in the past, does this solution take into
account any race condition between last consumer of bridge shutting down and
new one starting up, if KVM agent is able.to execute parallel start/ stop
commands?
> KVM: cloudstack-plugin-hypervisor-kvm with BridgeVifDriver doesn't cleanup
> vNet due to multiple reasons
> -------------------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-3431
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-3431
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Hypervisor Controller, KVM
> Affects Versions: 4.1.0, 4.1.1, 4.2.0
> Environment: KVM hyper visor with BridgeVifDriver
> Reporter: Toshiaki Hatano
> Assignee: Toshiaki Hatano
> Original Estimate: 8h
> Remaining Estimate: 8h
>
> When last VM which uses the guest network disappeared on the host,
> KVM agent should clean up it's guest network bridge and vlanIf but it doesn't.
> Biggest cause is missing parameter on calling modifyvlan.sh.
> But I found there're more errors related to this issue.
> I found at least 3.
> 1) missing parameter on calling modifyvlan.sh in
> com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.cleanupVnet(Connect,
> String)
> 2) VirtualMachineName.getVnet(String) will never return vnet
> 3) com.cloud.agent.api.StopCommand.getVnet(String) will never return vnet
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