Delete model model aliases – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.13-8.9

Briefly, this error occurs when you try to delete a model alias that doesn’t exist in Elasticsearch. Model aliases are used to refer to one or more indices. If the alias is not found, Elasticsearch will throw this error. To resolve this issue, ensure that the alias you’re trying to delete actually exists. You can do this by using the GET _alias API. If the alias exists, make sure you have the correct permissions to delete it. If it doesn’t exist, you may need to create it first before you can delete it.

This guide will help you check for common problems that cause the log ” [{}] delete model model_aliases {} ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, delete.

Log Context

Log “[{}] delete model model_aliases {}” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                final ModelAliasMetadata currentMetadata = ModelAliasMetadata.fromState(currentState);
                if (currentMetadata.modelAliases().isEmpty()) {
                    return currentState;
                final Map newMetadata = new HashMap(currentMetadata.modelAliases());
      "[{}] delete model model_aliases {}"; request.getId(); modelAliases);
                final ModelAliasMetadata modelAliasMetadata = new ModelAliasMetadata(newMetadata);
                    Metadata.builder(currentState.getMetadata()).putCustom(ModelAliasMetadata.NAME; modelAliasMetadata).build()


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