Merge pull request #7747 from kozlovsky/fix/event_manager_reconnect

Add one single attempt to reconnect to the Core in case of EventReqestManager disconnection

Author: kozlovsky

src/tribler/gui/event_request_manager.py

@@ -130,9 +130,12 @@ def on_error(self, error: int, reschedule_on_err: bool):
             return
 
         if self.receiving_data:
-            # Most probably Core is crashed. If CoreManager decides to restart the core,
-            # it will also call event_manager.connect_to_core()
-            self._logger.error('The connection to the Tribler Core was lost')
+            # Most probably Core crashed, but we try to reconnect anyway one single time to be sure.
+            # Later, if Core crashed and CoreManager decides to restart the core, it will also call
+            # event_manager.connect_to_core(reschedule_on_err=True)
+            self.receiving_data = False
+            self._logger.error('The connection to the Tribler Core was lost, trying to reconnect one single time')
+            self.reconnect(reschedule_on_err=False)
             return
 
         should_retry = reschedule_on_err and time.time() < self.start_time + CORE_CONNECTION_TIMEOUT