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Briefly, this error occurs when the geohash value provided to Elasticsearch is not in the correct string format. Geohash is a system of encoding geographic coordinates into a short string of letters and digits. Elasticsearch uses this for geospatial data. To resolve this issue, ensure that the geohash value you’re providing is a string. If you’re using a programming language to send data, make sure the geohash value is properly formatted as a string before sending it to Elasticsearch. Also, check for any possible data type conversion that might be causing the issue.
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This guide will help you check for common problems that cause the log ” geohash must be a string ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .
Log Context
Log “geohash must be a string” class name is GeoUtils.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
lon = parseValidDouble(subParser; "longitude"); } else if (GEOHASH.equals(field)) { if (subParser.currentToken() == Token.VALUE_STRING) { geohash = subParser.text(); } else { throw new ElasticsearchParseException("geohash must be a string"); } } else if (COORDINATES.equals(field)) { if (subParser.currentToken() == Token.START_ARRAY) { coordinates = new ArrayList<>(); while (subParser.nextToken() != Token.END_ARRAY) {