Briefly, this error occurs when Elasticsearch expects a string array but encounters a different data type instead. This mismatch in data types can cause the parsing process to fail. To resolve this issue, you can: 1) Check the data you’re trying to index and ensure it matches the expected data type. 2) Modify your mapping to match the data type of the incoming data. 3) Use a script to transform the data into the expected format before indexing. Always ensure that the data type in your index matches the type of data you’re trying to index.
This guide will help you check for common problems that cause the log ” could not parse [{}] field. expected a string array but found [{}] value instead ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “could not parse [{}] field. expected a string array but found [{}] value instead” class name is XContentUtils.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
}
throw new ElasticsearchParseException("could not parse [{}] field. expected a string array but found null value instead";
parser.currentName());
}
if (parser.currentToken() != XContentParser.Token.START_ARRAY) {
throw new ElasticsearchParseException("could not parse [{}] field. expected a string array but found [{}] value instead";
parser.currentName(); parser.currentToken());
} List list = new ArrayList<>();
XContentParser.Token token;
