Fix for issue Azure#41470. Added back exception message, removed earlier due to linting errors. (Azure#41512)

* Add exception message back to fix issue Azure#41470

* Updated changelog

Author: rads-1996

sdk/monitor/azure-monitor-opentelemetry-exporter/CHANGELOG.md

@@ -7,6 +7,8 @@
 ### Breaking Changes
 
 ### Bugs Fixed
+- Fix for issue #41470. Added back exception message, removed earlier due to linting errors
+  ([#41512] https://github.com/Azure/azure-sdk-for-python/pull/41512)
 
 ### Other Changes
 

sdk/monitor/azure-monitor-opentelemetry-exporter/azure/monitor/opentelemetry/exporter/export/_base.py

@@ -314,7 +314,7 @@ def _transmit(self, envelopes: List[TelemetryItem]) -> ExportResult:
                     _update_requests_map(_REQ_EXCEPTION_NAME[1], value=exc_type)
                 result = ExportResult.FAILED_RETRYABLE
             except Exception as ex:
-                logger.exception("Envelopes could not be exported and are not retryable: %s.")  # pylint: disable=C4769
+                logger.exception("Envelopes could not be exported and are not retryable: %s.", ex)  # pylint: disable=C4769
                 if self._should_collect_stats():
                     _update_requests_map(_REQ_EXCEPTION_NAME[1], value=ex.__class__.__name__)
                 result = ExportResult.FAILED_NOT_RETRYABLE