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    <p>Hello,</p>
    <p><br>
    </p>
    <p>I am trying to change cluster compatibility version on one of our
      clusters in our oVirt <span class="gwt-InlineLabel">4.0.4.4-1.el7.centos
        installation and I am getting this error:</span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel">Error while executing action Edit
        Cluster properties: Internal Engine Error</span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel">(btw. it would be realy nice make
        all texts/logs in manager copyable in some easy way (simple
        ctrl+c does not usually work))<br>
      </span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel">In engine.log I found this
        interesting lines<br>
      </span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel">2016-10-17 15:02:50,415 WARN 
        [org.ovirt.engine.core.bll.UpdateVmCommand] (default task-51)
        [2921f45e] Validation of action 'UpdateVm' failed for user
        user@auth. Reasons:
VAR__ACTION__UPDATE,VAR__TYPE__VM,ACTION_TYPE_FAILED_ILLEGAL_SINGLE_DEVICE_DISPLAY_TYPE<br>
        2016-10-17 15:02:50,417 ERROR
        [org.ovirt.engine.core.bll.UpdateVmCommand] (default task-51)
        [2921f45e] Transaction rolled-back for command
        'org.ovirt.engine.core.bll.UpdateVmCommand'.<br>
        2016-10-17 15:02:50,417 ERROR
        [org.ovirt.engine.core.bll.UpdateClusterCommand] (default
        task-51) [2921f45e] Transaction rolled-back for command
        'org.ovirt.engine.core.bll.UpdateClusterCommand'.<br>
        2016-10-17 15:02:50,421 ERROR
        [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
        (default task-51) [2921f45e] Correlation ID: 11011a71, Call
        Stack: null, Custom Event ID: -1, Message: Failed to update Host
        cluster (User: user@auth)<br>
        2016-10-17 15:02:50,422 INFO 
        [org.ovirt.engine.core.bll.UpdateClusterCommand] (default
        task-51) [2921f45e] Lock freed to object
        'EngineLock:{exclusiveLocks='null',
        sharedLocks='[27161d3d-01ef-4446-aa7a-be5483fdbdf5=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        0323b12f-a515-4759-9bae-cf53336a7756=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        1c6d0ce4-bdcd-4f77-906b-65e4f6415cc3=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        8240ebe8-388c-4a5b-996e-f9e5c77e6375=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        e6fab9a1-8f45-4565-8483-363137536334=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        7a5de3e0-ecbd-4ed6-bf98-2e7a45e96027=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        6db37ee2-0ff0-4642-9907-666376b13bda=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        dccb8bc9-4760-487b-a2bf-100906a50502=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        ea63bea8-f41d-4878-814e-fa62b123a89f=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        885b9641-fda5-4e90-889e-488b858bc37b=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        886a6b86-1bf9-43a0-b7ee-2c43640f8f42=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        f4fa4a7e-d0eb-44d8-8ed3-00c2b2705cb4=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        9d4673af-6fba-4b62-bdbf-0864dac65941=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        5ef8560e-bf35-4dfb-8677-3b444fcb9a5d=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        2dfc397f-7230-4517-b143-0bec13b3cd55=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        f9d1161f-0d7e-4da5-b45f-1796f87ddab5=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        2b0afe1d-1196-4c99-ab61-43e3764fe1ac=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        08016bb0-e638-431c-a429-0a8f3272632b=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        0a4596ec-fa40-46a1-9d2a-7dcaf0127136=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        9f0bb9a0-374f-41ec-9bec-e35fec4275a1=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        606f3257-7d38-405f-8fc9-b56ff6d36684=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        64976d4e-a64d-453b-8bcb-514c687ae208=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        833ebee2-7e8f-480c-877d-3bbdbf78c7ca=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        7dcabc9d-0d61-4bb0-a532-39655caa900d=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;,
        9eaceca3-4e48-4bde-8cfb-024219d226a9=&lt;VM,
        ACTION_TYPE_FAILED_CLUSTER_IS_BEING_UPDATED$clusterName
        Math-IBM_BladeS&gt;]'}'</span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel">It looks to me like one of our vm
        has "</span><span class="gwt-InlineLabel">ILLEGAL_SINGLE_DEVICE_DISPLAY_TYPE"
        set which fail upgrade. But which one and which setting
        correspond to this? :-)</span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel">I have no idea if changing cluster
        compatibility version should fail due this error. Should I fill
        Bugreport for this?<br>
      </span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel">Cheers,</span></p>
    <p><span class="gwt-InlineLabel">Jiri<br>
      </span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
    <p><span class="gwt-InlineLabel"><br>
      </span></p>
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