fix exception handling in rebalane thread

Signed-off-by: Leonid Chernin <leonidc@il.ibm.com>

control/rebalance.py

@@ -13,6 +13,8 @@
 import time
 import json
 import re
+import os
+import signal
 from .utils import GatewayLogger
 from .config import GatewayConfig
 from .proto import gateway_pb2 as pb2
@@ -40,8 +42,10 @@ def auto_rebalance_task(self ):
                         self.logger.debug(f"Nothing found for rebalance, break at {i} iteration")
                         break
                 except Exception:
-                        self.logger.exception(f"Exception in auto rebalance")
-                        raise
+                    self.logger.exception(f"Exception in auto rebalance")
+                    parent_pid = os.getppid()
+                    os.kill(parent_pid, signal.SIGTERM)
+                    raise SystemExit(f"auto rebalance failed, quitting gateway")
                 time.sleep(0.01) #release lock for 10ms after rebalancing each 1 NS
             time.sleep(self.rebalance_period_sec)