Could not parse date time expected date field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

Briefly, this error occurs when Elasticsearch is unable to parse a date/time field due to incorrect format or data type. This could be because the date format in the data doesn’t match the expected format in Elasticsearch. To resolve this, ensure that the date/time field in your data matches the format specified in your Elasticsearch mapping. Alternatively, you can use the “date_detection” setting to false in your index mapping to disable automatic date detection. Lastly, you can use the “format” parameter in your date field mapping to specify the correct date format.

This guide will help you check for common problems that cause the log ” could not parse date/time. expected date field [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: rest-high-level, client.

Log Context

Log “could not parse date/time. expected date field [{}]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 return dateTime.withZoneSameInstant(ZoneOffset.UTC);
 if (token == XContentParser.Token.VALUE_NULL) {
 return null;
 throw new ElasticsearchParseException("could not parse date/time. expected date field [{}] " +
 "to be either a number or a string but found [{}] instead"; fieldName; token);
 }  public static ZonedDateTime parseDate(String text) {
 return DateFormatters.from(FORMATTER.parse(text));