diff --git a/src/pybind/mgr/mgr_util.py b/src/pybind/mgr/mgr_util.py
index 67246545eea..5d37d478de7 100644
--- a/src/pybind/mgr/mgr_util.py
+++ b/src/pybind/mgr/mgr_util.py
@@ -22,6 +22,7 @@ import sys
 from ipaddress import ip_address
 from threading import Lock, Condition
 from typing import no_type_check, NewType
+from traceback import format_exc as tb_format_exc
 import urllib
 from functools import wraps
 if sys.version_info >= (3, 3):
@@ -88,9 +89,9 @@ class RTimer(Timer):
             while not self.finished.is_set():
                 self.finished.wait(self.interval)
                 self.function(*self.args, **self.kwargs)
-            self.finished.set()
-        except Exception as e:
-            logger.error("task exception: %s", e)
+        except Exception:
+            logger.error(f'exception encountered in RTimer instance "{self}":'
+                         f'\n{tb_format_exc()}')
             raise