Error attempting to fail shard – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.9-2.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your OpenSearch operation.

Briefly, this error occurs when OpenSearch tries to mark a shard as failed but encounters an issue. This could be due to network problems, disk issues, or a bug in the system. To resolve this, you can try restarting the node, checking the network connectivity, or verifying the disk health. If the problem persists, consider reindexing the data or upgrading OpenSearch to the latest version to fix potential bugs.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” Error attempting to fail shard ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: indices, replication, shard.

Log Context

Log “Error attempting to fail shard” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

    private void failShard(ReplicationFailedException e; IndexShard indexShard) {
        try {
            indexShard.failShard("unrecoverable replication failure"; e);
        } catch (Exception inner) {
            logger.error("Error attempting to fail shard"; inner);



How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Get expert answers on Elasticsearch/OpenSearch