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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upload_artifact()
is deprecated. Please use optuna.artifacts.upload_artifact()
instead.
upload_artifact
function has been ported to Optuna.
Please use optuna.artifacts.upload_artifact function instead.
Deprecated APIs |
Corresponding Active APIs |
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Please note that the order of arguments is different between the deprecated and active APIs.
FileSystemBackend
is deprecated. Please use FileSystemArtifactStore
instead.
FileSystemBackend
class has been ported to Optuna.
Please use FileSystemArtifactStore class instead.
Deprecated APIs |
Corresponding Active APIs |
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Boto3Backend`
is deprecated. Please use Boto3ArtifactStore
instead.
Boto3Backend
class has been ported to Optuna.
Please use Boto3ArtifactStore class instead.
Deprecated APIs |
Corresponding Active APIs |
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