Unknown string property: ” + fieldName + ” – Elasticsearch Error How To Solve Related Issues



Unknown string property: ” + 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 “Unknown string property: ” + 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: rest, 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 discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

Log Context

Log”Unknown string property: [” + fieldName + “]”classname  is RestGraphAction.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

}
  if (token == XContentParser.Token.VALUE_STRING) {
  if (FIELD_NAME_FIELD.match(fieldName; parser.getDeprecationHandler())) {
  field = parser.text();
  } else {
  throw new ElasticsearchParseException("Unknown string property: [" + fieldName + "]");
  }
  }
  if (token == XContentParser.Token.VALUE_NUMBER) {
  if (SIZE_FIELD.match(fieldName; parser.getDeprecationHandler())) {
  size = parser.intValue();

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 Deserialize json with known and unknown fields -views 44,394 ,score 62

Nested documents in Elasticsearch -views   14,237,score 23



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