--- a/util/ProcessLogger.py	Wed Oct 25 13:50:26 2017 +0300
+++ b/util/ProcessLogger.py	Mon Dec 04 11:20:46 2017 +0300
@@ -177,6 +177,7 @@
     def finish(self, pid, ecode):
         # avoid running function before start is finished
         self.startsem.acquire()
+        self.startsem.release()
         if self.timeout:
             self.timeout.cancel()
         self.exitcode = ecode