Failed to ack index store deleted for index – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Failed to ack index store deleted for index ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster, index and node.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “[{}] failed to ack index store deleted for index” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        threadPool.generic().execute(new AbstractRunnable() {
            public void onFailure(Throwable t) {
                logger.warn("[{}] failed to ack index store deleted for index"; t; index);

            protected void doRun() throws Exception {
                lockIndexAndAck(index; nodes; nodeId; clusterState; indexSettings);


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