Briefly, this error occurs when Elasticsearch is unable to parse the input for a watch due to an unexpected string field. This usually happens when there’s a syntax error or incorrect data type in the watch definition. To resolve this issue, you should first check the watch definition for any syntax errors. Make sure that all fields are correctly defined and that the data types match what is expected. If the error persists, try to simplify the watch definition to isolate the problematic part. Lastly, ensure that the Elasticsearch version you’re using supports the features used in your watch definition.
This guide will help you check for common problems that cause the log ” could not parse [{}] input for watch [{}]. unexpected string field [{}] ” 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 [{}]. unexpected string field [{}]” class name is HttpInput.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
if (expectedResponseBodyType == null) {
throw new ElasticsearchParseException("could not parse [{}] input for watch [{}]. unknown content type [{}]";
TYPE; watchId; parser.text());
}
} else {
throw new ElasticsearchParseException("could not parse [{}] input for watch [{}]. unexpected string field [{}]";
TYPE; watchId; currentFieldName);
}
} else {
throw new ElasticsearchParseException("could not parse [{}] input for watch [{}]. unexpected token [{}]"; TYPE; watchId;
token);
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