Briefly, this error occurs when there’s an invalid or unsupported property in the vertices definition of a graph query in Elasticsearch. This could be due to a typo, incorrect field name, or using a field that doesn’t support graph queries. To resolve this issue, you should first verify the field names and properties in your vertices definition. Ensure they are correctly spelled and are valid for graph queries. If the error persists, consider changing the field type or using a different field that supports graph queries.
This guide will help you check for common problems that cause the log ” Illegal property in graph vertices definition ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, rest.
Log Context
Log “Illegal property in graph vertices definition” class name is RestGraphAction.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
excludes = new HashSet<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
excludes.add(parser.text());
}
} else {
throw new ElasticsearchParseException("Illegal property in graph vertices definition " + fieldName;
token.name());
}
}
if (token == XContentParser.Token.VALUE_STRING) {
if (FIELD_NAME_FIELD.match(fieldName; parser.getDeprecationHandler())) {
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