Briefly, this error occurs when Elasticsearch is unable to parse a field as an address list because the field is not in the correct format. The field must be a string or an array of strings. To resolve this issue, you should check the format of the field causing the error. Ensure that it is either a single string or an array of strings. If it’s not, you need to convert it to the correct format before Elasticsearch can parse it.
This guide will help you check for common problems that cause the log ” could not parse [” + field + “] as address list. field must either be a string ” 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 + “] as address list. field must either be a string ” class name is Email.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
addresses.add(Address.parse(field; token; parser));
}
return new Email.AddressList(addresses);
}
throw new ElasticsearchParseException("could not parse [" + field + "] as address list. field must either be a string " +
"(comma-separated list of RFC822 encoded addresses) or an array of objects representing addresses");
} @Override
public boolean equals(Object o) {
