Improve TB error message when 'scalars' is missing from multiplexer

Summary: Previous message was hard for users to interpret, leading them to contact support. Reviewed By: sunnyshen321 Differential Revision: D68292863
facebook · Jan 17, 2025 · be12af6 · be12af6
1 parent 3c68bd3
commit be12af6
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/ax/metrics/tensorboard.py b/ax/metrics/tensorboard.py
@@ -119,8 +119,10 @@ def bulk_fetch_trial_data(
                     metric.name: Err(
                         MetricFetchE(
                             message=(
-                                "No 'scalar' data found for trial in multiplexer "
-                                f"{mul=}"
+                                "Tensorboard multiplexer is empty. This can happen if "
+                                "TB data is not populated at the time of fetch. Check "
+                                "the corresponding logs to confirm that Tensorboard "
+                                "data is available."
                             ),
                             exception=None,
                         )