diff --git core/server/gen_pid.py core/server/gen_pid.py
index e0915da..865d991 100644
--- core/server/gen_pid.py
+++ core/server/gen_pid.py
@@ -65,7 +65,7 @@ def clear_finished_pids(clVars):
             d = pickle.load(open(pidfile))
             if path.exists(path.join("/proc", str(d['os_pid']))):
                 continue
-        except (ValueError, KeyError, EOFError, OSError):
+        except BaseException:
             pass
         with ignore(OSError):
             os.unlink(pidfile)