Failed to recover from malformed JSON data. – 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.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” Failed to recover from malformed JSON data. ” 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 recover from malformed JSON data.” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             try {
                token = parser.nextToken();
            } catch (JsonParseException e) {
                if (errorCounter >= PARSE_ERRORS_LIMIT) {
                    logger.error("Failed to recover from malformed JSON data."; e);
                    throw new ElasticsearchParseException("The input JSON data is malformed.");
        } while (token != XContentParser.Token.END_OBJECT);


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