Description of problem:
Currently we support three ways to do certain tasks, for example detaching network, breaking bond etc. The oldest one is quite buggy and it's not worthy to have it in code base if it's not even maintained any more.
*** This bug has been marked as a duplicate of bug 1277495 ***
It is still possible to use the old api for attaching network to an interface:
(also for detach)
(more details in the following link: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.0/html-single/REST_API_Guide/#sect-REST_API_Guide-Hosts-Network_Interfaces-Attach ).
Please note that the action eventually failed as GetAllChildVlanInterfacesQuery is being called and it's missing a constructor with EngineContext as an argument.
2015-11-15 12:38:10,689 ERROR [org.ovirt.engine.core.bll.network.host.AttachNetworkToVdsInterfaceCommand] (default task-8) [5ee3b8fa] Error during CanDoActionFailure.: javax.ejb.EJBException: java.lang.RuntimeException: java.lang.RuntimeException: could not find matching constructor for Command class class org.ovirt.engine.core.bll.network.host.GetAllChildVlanInterfacesQuery
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oVirt 4.0.0 has been released, closing current release.