wait a bit if qemu proces is not started

slapos/qemuqmpclient/__init__.py

@@ -75,9 +75,16 @@ def getInitialQemuResourceDict(pid_file):
       raise ValueError("%r is empty or doesn't contain a valid pid number: %s" % (
         pid_file, str(e)))
 
-  try:
-    process = psutil.Process(pid)
-  except psutil.NoSuchProcess:
+  wait_count = 5
+  while wait_count > 0:
+    try:
+      process = psutil.Process(pid)
+      break
+    except psutil.NoSuchProcess:
+      print "Qemu process is not started yet..."
+      wait_count -= 1
+      time.sleep(0.5)
+  else:
     raise ValueError('No process with pid %s' % pid)
 
   if not process.name().startswith('qemu-system'):