Expected array for ” + field + ” – Elasticsearch Error How To Solve Related Issues

Expected array for ” + field + ” – 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 “expected array for ” + field + “” 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: repositories.

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”expected array for [” + field + “]”classname  is RepositoryData.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (metaGenerations.isEmpty() == false) {
  indexMetaLookup.put(snapshotId; metaGenerations);
  } else {
  throw new ElasticsearchParseException("expected array for [" + field + "]");
  } else if (INDICES.equals(field)) {
  if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
  throw new ElasticsearchParseException("start object expected [indices]");

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 Cannot construct instance of `java.time.LocalDate` – Spring boot, elasticseach, jackson -views 21,154 ,score 17

Elasticsearch Bulk API – Unexpected end-of-input: expected close marker for ARRAY -views   18,802,score 12

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