NPE while deploy vm on a IPv6-only shared network

[weizhouapache]

Got a NPE

java.lang.NullPointerException
        at com.cloud.network.Networks$BroadcastDomainType.getSchemeValue(Networks.java:177)
        at com.cloud.network.Networks$BroadcastDomainType.getValue(Networks.java:231)
        at com.cloud.hypervisor.kvm.resource.BridgeVifDriver.plug(BridgeVifDriver.java:209)
        at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.createVif(LibvirtComputingResource.java:3015)
        at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.createVifs(LibvirtComputingResource.java:2710)
        at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtStartCommandWrapper.execute(LibvirtStartCommandWrapper.java:81)
        at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtStartCommandWrapper.execute(LibvirtStartCommandWrapper.java:46)
        at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtRequestWrapper.execute(LibvirtRequestWrapper.java:78)
        at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.executeRequest(LibvirtComputingResource.java:1768)

ISSUE TYPE

• Bug Report

COMPONENT NAME

management server

CLOUDSTACK VERSION

4.16.0.0

CONFIGURATION

advanced zone

OS / ENVIRONMENT

Mgmt server: Ubuntu 20.04
Hypervisor: Ubuntu 20.04

SUMMARY

STEPS TO REPRODUCE

1. create a shared network with only ipv6
2. deploy a vm

EXPECTED RESULTS

succeed

ACTUAL RESULTS

Got exception, see the description

[rohityadavcloud]

Partially fixed in #5648

[sureshanaparti]

Fixed in #5810