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

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

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Expected starting JSON object after in watch ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: plugin.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log”Expected starting JSON object after [{}] in watch [{}]”classname  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

Run the Check-Up to get customized recommendations like this:

error

Heavy merges detected in specific nodes

error-img

Description

A large number of small shards can slow down searches and cause cluster instability. Some indices have shards that are too small…

error-img

Recommendations Based on your specific ES deployment you should…

Based on your specific ES deployment you should…

1

X-PUT curl -H [a customized recommendation]

 

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