Error Messages
This section lists descriptions and background for common error messages and warnings raised or emitted by Optuna Dashboard.
Warning Messages
Human-in-the-loop optimization will not work with _CachedStorage in Optuna prior to v3.2.
This warning occurs when the storage object associated with the Optuna Study is of the _CachedStorage class.
When using RDBStorage with Optuna, it is implicitly wrapped with the _CachedStorage class for performance improvement.
However, there is a bug in the _CachedStorage class that prevents Optuna from synchronizing the latest Trial information.
This bug is not a problem for the general use case of Optuna, but it is critical for human-in-the-loop optimization.
If you are using a version prior to v3.2, please upgrade to v3.2 or later, use another storage classes,
or use a following dirty hack to unwrap _CachedStorage class.
if isinstance(study._storage, optuna.storages._CachedStorage):
study._storage = study._storage._backend
set_objective_names() function is deprecated. Please use study.set_metric_names() instead.
set_objective_names() function has been ported to Optuna.
Please use study.set_metric_names() function instead.
Deprecated APIs |
Corresponding Active APIs |
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