Invalid month day value for field. expected string/number value or an – How to solve this Elasticsearch error

Invalid month day value for field. expected string/number value or an – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” invalid month day value for field. expected string/number value or an ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: plugin.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log”invalid month day value for [{}] field. expected string/number value or an”classname  is MonthTimes.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} else if (token == XContentParser.Token.START_ARRAY) {
  while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
  daysSet.add(parseDayValue(parser; token));
  }
  } else {
  throw new ElasticsearchParseException("invalid month day value for [{}] field. expected string/number value or an " +
  "array of string/number values; but found [{}]"; currentFieldName; token);
  }
  } else if (TIME_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
  if (token != XContentParser.Token.START_ARRAY) {
  try {

 

Run the Check-Up to get a customized report like this:

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