[8.x] Properly display stacktrace for errors in extractor/sink tasks (#…

…2881) (#2901)

Co-authored-by: Artem Shelkovnikov <artem.shelkovnikov@elastic.co>

connectors/es/sink.py

@@ -1058,7 +1058,8 @@ def sink_task_callback(self, task):
             )
         elif task.exception():
             self._logger.error(
-                f"Encountered an error in the sync's {type(self._sink).__name__}: {task.get_name()}: {task.exception()}",
+                f"Encountered an error in the sync's {type(self._sink).__name__}: {task.get_name()}",
+                exc_info=task.exception(),
             )
             self.error = task.exception()
 
@@ -1069,6 +1070,7 @@ def extractor_task_callback(self, task):
             )
         elif task.exception():
             self._logger.error(
-                f"Encountered an error in the sync's {type(self._extractor).__name__}: {task.get_name()}: {task.exception()}",
+                f"Encountered an error in the sync's {type(self._extractor).__name__}: {task.get_name()}",
+                exc_info=task.exception(),
             )
             self.error = task.exception()