Failed to create temporary index for parsing the alias – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch fails to create a temporary index that is needed to parse an alias. This could be due to insufficient permissions, lack of disk space, or a network connectivity issue. To resolve this, you can check and adjust the user permissions, ensure there is enough disk space, and verify the network connection. Additionally, check the OpenSearch logs for more detailed error messages that can help pinpoint the exact issue.

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This guide will help you check for common problems that cause the log ” Failed to create temporary index for parsing the alias ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, cluster, alias, metadata.

Log Context

Log “Failed to create temporary index for parsing the alias” class name is We extracted the following from OpenSearch source code for those seeking an in-depth context :

 // temporarily create the index and add mappings so we can parse the filter
 try {
 indexService = indicesService.createIndex(index; emptyList(); false);
 } catch (IOException e) {
 throw new OpenSearchException("Failed to create temporary index for parsing the alias"; e);
 indexService.mapperService().merge(index; MapperService.MergeReason.MAPPING_RECOVERY);
 indices.put(action.getIndex(); indexService);


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