Error updating synonyms – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 8.9-8.9

Briefly, this error occurs when Elasticsearch fails to update the synonyms used for text analysis in its index. This could be due to incorrect syntax in the synonyms file, issues with file permissions, or the file being inaccessible. To resolve this, ensure the synonyms file is correctly formatted and located in the correct path. Also, check the file permissions to ensure Elasticsearch can read it. If the synonyms are being updated dynamically, ensure the correct API call is being made.

This guide will help you check for common problems that cause the log ” Error updating synonyms: ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .

Log Context

Log “Error updating synonyms:” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 .execute(deleteByQueryResponseListener.delegateFailure((bulkInsertResponseListener; bulkInsertResponse) -> {
 if (bulkInsertResponse.hasFailures()) {
 new ElasticsearchException("Error updating synonyms: " + bulkInsertResponse.buildFailureMessage())
 UpdateSynonymsResultStatus updateSynonymsResultStatus = created
 ? UpdateSynonymsResultStatus.CREATED


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