Error in the format of data for user – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.

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

Log Context

Log “Error in the format of data for user [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 enabled = Boolean.TRUE;
            Map metadata = (Map) sourceMap.get(Fields.METADATA.getPreferredName());
            return new UserAndPassword(new User(username; roles; fullName; email; metadata; enabled); password.toCharArray());
        } catch (Exception e) {
            logger.error(new ParameterizedMessage("error in the format of data for user [{}]"; username); e);
            return null;

    private static boolean isIndexNotFoundOrDocumentMissing(Exception e) {


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