No handler for type ” + type + ” declared on field ” + fieldName + ” – Elasticsearch Error How To Solve Related Issues



No handler for type ” + type + ” declared on field ” + fieldName + ” – Elasticsearch Error How To Solve Related Issues

Updated: July-20

Elasticsearch 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 causing many errors 

 

This guide will help you check for common problems that cause the log “No handler for type ” + type + ” declared on field ” + fieldName + “” 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: handler, index.


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 discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

Log Context

Log”No handler for type [” + type + “] declared on field [” + fieldName + “]”classname  is ObjectMapper.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

}
  }
 
  Mapper.TypeParser typeParser = parserContext.typeParser(type);
  if (typeParser == null) {
  throw new MapperParsingException("No handler for type [" + type + "] declared on field [" + fieldName + "]");
  }
  String[] fieldNameParts = fieldName.split("\.");
  String realFieldName = fieldNameParts[fieldNameParts.length - 1];
  Mapper.Builder> fieldBuilder = typeParser.parse(realFieldName; propNode; parserContext);
  for (int i = fieldNameParts.length - 2; i >= 0; --i) {

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 No handler for type [string] declared on field [name] -views 43,709 ,score 104

Elasticsearch: No handler for type [keyword] declared on field [hostname] -views   21,358,score 14



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