Could not parse input for watch failed to parse http request – 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, specifically failing to parse an HTTP request. This could be due to incorrect syntax, invalid data format, or a malformed request. To resolve this issue, you can: 1) Check and correct the syntax of your HTTP request. 2) Validate the data format you’re using against Elasticsearch’s expected format. 3) Ensure the request is properly formed and doesn’t contain any invalid or unsupported parameters.

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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 http request ” 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 [{}] input for watch [{}]. failed to parse http request” 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 = HttpRequestTemplate.Parser.parse(parser);
 } catch (ElasticsearchParseException pe) {
 throw new ElasticsearchParseException("could not parse [{}] input for watch [{}]. failed to parse http request " +
 "template"; pe; TYPE; watchId);
 } else if (token == XContentParser.Token.START_ARRAY) {
 if (Field.EXTRACT.getPreferredName().equals(currentFieldName)) {
 extract = new HashSet<>();


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