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Briefly, this error occurs when Elasticsearch fails to parse the license information due to an incorrect format. It expects a JSON object but is receiving a different format. To resolve this issue, you can check the format of your license information and ensure it is a valid JSON object. Also, ensure that the license information is correctly placed in the Elasticsearch configuration. If you’re updating the license, ensure you’re using the correct API endpoint and method. Lastly, check for any syntax errors or missing brackets in your JSON object.
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This guide will help you check for common problems that cause the log ” failed to parse licenses expected start object ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, license.
Log Context
Log “failed to parse licenses expected start object” class name is License.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
// Ignore all other fields - might be created with new version
} else {
throw new ElasticsearchParseException("failed to parse licenses expected field");
}
} else {
throw new ElasticsearchParseException("failed to parse licenses expected start object");
}
return license;
}
}
