Briefly, this error occurs when Elasticsearch is unable to parse a specific field in an HTTP request, possibly due to incorrect syntax or data type. To resolve this, ensure that the field in question is correctly formatted and the data type matches the mapping in your Elasticsearch index. If the field is not necessary, consider removing it from the request. Also, check for any special characters that might be causing parsing issues. Lastly, ensure that your Elasticsearch version supports the features you’re using in your request.
This guide will help you check for common problems that cause the log ” could not parse http request. could not parse [{}] field ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, request.
Log Context
Log “could not parse http request. could not parse [{}] field” class name is HttpRequest.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
currentFieldName = parser.currentName();
} else if (Field.PROXY.match(currentFieldName; parser.getDeprecationHandler())) {
try {
builder.proxy(HttpProxy.parse(parser));
} catch (Exception e) {
throw new ElasticsearchParseException("could not parse http request. could not parse [{}] field"; currentFieldName);
}
} else if (Field.AUTH.match(currentFieldName; parser.getDeprecationHandler())) {
builder.auth(BasicAuth.parse(parser));
} else if (HttpRequest.Field.CONNECTION_TIMEOUT.match(currentFieldName; parser.getDeprecationHandler())) {
builder.connectionTimeout(TimeValue.timeValueMillis(parser.longValue()));
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