title: ovs-ofctl queue-stats command not working and I cannot find ovs-vswitchd.log file
body: <p>now I'm using ovs 2.4.0, and I made queues in Qos and stuck it to port.</p>
  
  <p>I can check queue list using <code>ovs-vsctl list queue</code> command, 
  and I can also watch <code>ovsdb-tool show-log</code> command's result.(all queue is generated already.)</p>
  
  <p>I checked the <code>ovsdb-client dump</code> result, and I can see port-qos-queue were stuck very well.</p>
  
  <p>But I cannot see the queue info through <code>ovs-ofctl queue-stats (bridge) (port)</code> command, it just returns there's no queue on port.</p>
  
  <p>I searched all results, but I cannot find how to solve the prob.</p>
  
  <p>ovs-vswitchd.log file is not in here.(I search file through <code>find / -name *.log</code>)
  I don't know what's the command that makes log file.</p>
  
  <p>Can anybody help?</p>