Could not parse input for watch expected a string value in – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

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Briefly, this error occurs when Elasticsearch is unable to parse the input for a watch due to an unexpected data type. It’s expecting a string value but is receiving a different data type. To resolve this issue, you should check the data type of the input you’re providing to the watch. Ensure that it’s a string as expected. If it’s not, you need to convert it to a string before passing it to the watch. Also, check for any syntax errors in your watch definition that might be causing this issue.

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This guide will help you check for common problems that cause the log ” could not parse [{}] input for watch [{}]. expected a string value in ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, search.

Log Context

Log “could not parse [{}] input for watch [{}]. expected a string value in” class name is SearchInput.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 extract = new HashSet<>();
 while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
 if (token == XContentParser.Token.VALUE_STRING) {
 extract.add(parser.text());
 } else {
 throw new ElasticsearchParseException("could not parse [{}] input for watch [{}]. expected a string value in " +
 "[{}] array; but found [{}] instead"; TYPE; watchId; currentFieldName; token);
 }
 }
 } else {
 throw new ElasticsearchParseException("could not parse [{}] input for watch [{}]. unexpected array field [{}]"; TYPE;

 

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