Briefly, this error occurs when Elasticsearch expects a string array but encounters a different data type in the field. This mismatch in data types leads to a parsing error. To resolve this, ensure that the data type of the values in the field matches the expected data type. You can do this by checking your data input or by modifying your mapping to accommodate the current data type. Alternatively, you can use a script to convert the data type before indexing.
This guide will help you check for common problems that cause the log ” could not parse [{}] field. expected a string array but one of the value in the ” 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 one of the value in the” class name is XContentUtils.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token == XContentParser.Token.VALUE_STRING) {
list.add(parser.text());
} else {
throw new ElasticsearchParseException("could not parse [{}] field. expected a string array but one of the value in the " +
"array is [{}]"; parser.currentName(); token);
}
}
return list.toArray(new String[list.size()]);
}
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