Open index request failed to be acknowledged – 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.

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 ” open index request failed to be acknowledged ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: request, plugin, index.


Log Context

Log “open index request failed to be acknowledged”classname  is OpenIndexStep.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

) {
 if (indexMetadata.getState() == IndexMetadata.State.CLOSE) {
 OpenIndexRequest request = new OpenIndexRequest(indexMetadata.getIndex().getName()).masterNodeTimeout(TimeValue.MAX_VALUE);
 getClient().admin().indices().open(request; ActionListener.wrap(openIndexResponse -> {
 if (openIndexResponse.isAcknowledged() == false) {
 throw new ElasticsearchException("open index request failed to be acknowledged");
 }
 listener.onResponse(null);
 }; listener::onFailure)); 
 } else {

 

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