Index failed to complete pending deletion for index – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch is unable to delete an index that has been marked for deletion. This could be due to a variety of reasons such as insufficient permissions, disk space issues, or a network problem. To resolve this issue, you can try the following: 1) Check and ensure that Elasticsearch has the necessary permissions to delete the index. 2) Verify that there is enough disk space available. 3) Check the network connectivity between the nodes. 4) Restart the Elasticsearch service.

This guide will help you check for common problems that cause the log ” [” + index + “] failed to complete pending deletion for index ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices, index, cluster.

Log Context

Log “[” + index + “] failed to complete pending deletion for index” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            if (indexSettings != null) {
                threadPool.generic().execute(new AbstractRunnable() {
                    public void onFailure(Exception e) {
                        logger.warn(() -> "[" + index + "] failed to complete pending deletion for index"; e);

                    protected void doRun() throws Exception {
                        final TimeValue timeout = TimeValue.timeValueMinutes(30);


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