The set of patterns is invalid – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 8.7-8.9

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Briefly, this error occurs when Elasticsearch tries to match an index pattern but the provided pattern is invalid or empty. This could be due to a syntax error or a non-existent index. To resolve this issue, you can check the index pattern for any syntax errors and correct them. If the index does not exist, create it before using it in the pattern. Also, ensure that the pattern is not empty as Elasticsearch requires a valid pattern to match indices.

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

Log Context

Log “The set of patterns [{}] is invalid” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } catch (IllegalArgumentException e) {
 LOGGER.debug("Pattern automaton [{}] is invalid"; patterns);
 throw new ElasticsearchSecurityException("The set of patterns [{}] is invalid"; e; getPatternsDescription(patterns));
 }  private static String getPatternsDescription(Collection patterns) {
 String description = Strings.collectionToCommaDelimitedString(patterns);


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