Failed to parse %s %s on the %s – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.4-8.9

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Briefly, this error occurs when Elasticsearch is unable to parse a specific field or value in the data. This could be due to incorrect data types, malformed JSON, or incorrect field mapping. To resolve this issue, you can: 1) Check the data you’re trying to index to ensure it’s correctly formatted and matches the expected data types. 2) Review your field mappings to ensure they align with the data. 3) If you’re using dynamic mapping, consider switching to explicit mapping for more control. 4) Use the Elasticsearch Validate API to debug the issue.

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This guide will help you check for common problems that cause the log ” failed to parse [%s/%s] on the [%s] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “failed to parse [%s/%s] on the [%s]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                        listener.onResponse(false == doesNotExistResponseChecker.apply(response));
                    } else {
                        onFailure(new ResponseException(response));
                } catch (Exception e) {
                    logger.error(() -> format("failed to parse [%s/%s] on the [%s]"; resourceBasePath; resourceName; resourceOwnerName); e);



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