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Briefly, this error occurs when Elasticsearch encounters malformed or invalid JSON data during a recovery process. This could be due to incorrect syntax, missing brackets, or incorrect data types. To resolve this issue, you can: 1) Validate your JSON data using a JSON validator to ensure it’s correctly formatted. 2) Check the Elasticsearch logs for more detailed error messages that can help pinpoint the exact issue. 3) If the error persists, consider reindexing your data, ensuring that the JSON data being indexed is valid and correctly formatted.
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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 XContentRecordReader.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
try {
token = parser.nextToken();
} catch (XContentEOFException | XContentParseException e) {
++errorCounter;
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);
}
