Failed to load metadata – How to solve this Elasticsearch error

Opster Team

March-22, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

Briefly, this error message indicates that Elasticsearch was unable to load the metadata associated with an index. Metadata in Elasticsearch includes information about the structure and settings of an index, as well as information about the shards and replicas that make up the index. To resolve this error, check that the index exists and that Elasticsearch has sufficient permissions to access the necessary metadata.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” failed to load metadata ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster, metadata, admin.

Log Context

Log “failed to load metadata”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 snapshotMapBuilder.put(snapshot; unmodifiableMap(shardMapBuilder));
 return new NodeSnapshotStatus(clusterService.localNode(); unmodifiableMap(snapshotMapBuilder));
 } catch (Exception e) {
 throw new ElasticsearchException("failed to load metadata"; e);
 public static class Request extends BaseNodesRequest {


See how you can use AutoOps to resolve issues

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