should be a hash but was of type: – How to solve this Elasticsearch error

should be a hash but was of type: – 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 ” should be a hash but was of type: ” 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: Node.

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”should be a hash but was of type:”classname  is XContentMapValues.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

public static Map nodeMapValue(Object node; String desc) {
  if (node instanceof Map) {
  return (Map) node;
  } else {
  throw new ElasticsearchParseException(desc + " should be a hash but was of type: " + node.getClass());
  }
  }
 
  /**
  * Returns an array of string value from a node value.

 

Run the Check-Up to get a customized report like this:

Analyze your cluster