Stripping aliases from index before importing – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-1.1

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Briefly, this error occurs when OpenSearch is trying to import an index and finds that it has aliases associated with it. Aliases are alternative names for indices, and they can cause conflicts during the import process. To resolve this issue, you can either manually remove the aliases before importing the index, or you can modify your import script to automatically strip aliases from indices. Additionally, you can use the OpenSearch API to manage aliases and ensure they are not associated with the index before import.

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This guide will help you check for common problems that cause the log ” [{}] stripping aliases: {} from index before importing ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index.

Log Context

Log “[{}] stripping aliases: {} from index before importing” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

    private IndexMetadata stripAliases(IndexMetadata indexMetadata) {
        if (indexMetadata.getAliases().isEmpty()) {
            return indexMetadata;
        } else {
  "[{}] stripping aliases: {} from index before importing";
                indexMetadata.getIndex(); indexMetadata.getAliases().keys());
            return IndexMetadata.builder(indexMetadata).removeAllAliases().build();


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