Could not parse input for watch failed to parse – 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. This could be due to incorrect syntax, invalid data types, or missing required fields in the watch definition. To resolve this issue, you should first verify the syntax and structure of your watch definition. Ensure that all required fields are present and that data types match what is expected. If the error persists, consider simplifying your watch definition to isolate the problematic part. Lastly, check the Elasticsearch logs for more detailed error messages that can help pinpoint the issue.

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This guide will help you check for common problems that cause the log ” could not parse [{}] input for watch [{}]. failed to parse [{}] ” 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 [{}]. failed to parse [{}]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 currentFieldName = parser.currentName();
 } else if (Field.REQUEST.match(currentFieldName; parser.getDeprecationHandler())) {
 try {
 request = WatcherSearchTemplateRequest.fromXContent(parser; ExecutableSearchInput.DEFAULT_SEARCH_TYPE);
 } catch (ElasticsearchParseException srpe) {
 throw new ElasticsearchParseException("could not parse [{}] input for watch [{}]. failed to parse [{}]"; srpe; TYPE;
 watchId; currentFieldName);
 } else if (token == XContentParser.Token.START_ARRAY) {
 if (Field.EXTRACT.match(currentFieldName; parser.getDeprecationHandler())) {
 extract = new HashSet<>();


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