[ovirt-users] VM is locked, servlet , and SpiceVersion.txt problem

Hello everyone! Thank for your time to analyize my problem. Totally, i have two question. I encountered vm image lock problem. The following action is what i have to and make the vm image locked. First, i imported a vm. Since it is take too long time to import and the engine.log always repeatly said it was waiting child command id. "2018-02-23 16:37:46,603+08 INFO [org.ovirt.engine.core.bll.ConcurrentChildCommandsExecutionCallback] (EE-ManagedThreadFactory-engineScheduled-Thread-16) [1c44d543-4dcc-429d-a172-386cc860afe0] Command 'ImportVm' (id: '09718bd2-797d-4323-b1ad-1a85604543c3') waiting on child command id: '9e285b2d-c0c7-4a75-8c70-b619b45c6855' type:'CopyImageGroup' to complete " So,I thought the operation was not normal. So, 1. I use "./unlock_entity.sh" to unlock the virtual disk of the vm. 2. Virtual disk was unlocked but vm was still locked. Therefore, i use "./unlock_entity.sh" to show locked vm. But there was nothing. 3. Then i used "./taskcleaner.sh" to clean all task. But nothing happen. Q1: So, now, i would like to ask how to unlock the vm image so that i can delete or use it. Q2: In addition, there are two error or warning appeared in engine.log 1. 2018-02-23 09:57:19,495+08 WARN [org.ovirt.engine.core.utils.servlet.ServletUtils] (default task-272) [] File'/usr/share/ovirt-engine/ui-plugins/dashboard-resources/css/main-tab.d3769419.css' is 2839039 bytes long. Please reconsider using this servlet for files larger than 1048576 bytes. 2. 2018-02-23 09:47:39,656+08 ERROR [org.ovirt.engine.core.utils.servlet.ServletUtils] (default task-193) [] Can't read file '/usr/share/ovirt-engine/files/spice/SpiceVersion.txt' for request '/ovirt-engine/services/files/spice/SpiceVersion.txt', will send a 404 error response. Do you guys have any idea what do they mean? I really appreciate you help. Thank you! Regards Terry