Expected starting JSON object after in watch – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch expects a JSON object at the start of a watch definition, but it doesn’t find one. This could be due to a syntax error or incorrect formatting in the watch JSON. To resolve this issue, you should review the watch definition and ensure it starts with a JSON object. Also, validate the JSON syntax to ensure there are no errors. If the problem persists, consider recreating the watch with the correct JSON structure.

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This guide will help you check for common problems that cause the log ” Expected starting JSON object after [{}] in watch [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “Expected starting JSON object after [{}] in watch [{}]” class name is ChainInput.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  private static Input parseSingleInput(String watchId; String name; XContentParser parser; InputRegistry inputRegistry)
 throws IOException {
 if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
 throw new ElasticsearchParseException("Expected starting JSON object after [{}] in watch [{}]"; name; watchId);
 }  Input input = inputRegistry.parse(watchId; parser).input();  // expecting closing of two json object to start the next element in the array

 

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