Failed to delete – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.13-8.2

Briefly, this error occurs when Elasticsearch is unable to delete an index or document due to various reasons such as insufficient permissions, incorrect index name, or the index being in use. To resolve this issue, ensure that you have the necessary permissions to delete the index or document. Also, verify that the index name is correct and not currently being used. If the problem persists, try restarting the Elasticsearch service.

This guide will help you check for common problems that cause the log ” Failed to delete [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: delete, cache, plugin.

Log Context

Log “Failed to delete [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        assert assertNoPendingListeners();
        try {
        } catch (IOException e) {
            // nothing to do but log failures here since closeInternal could be called from anywhere and must not throw
            logger.warn(() -> new ParameterizedMessage("Failed to delete [{}]"; file); e);
        } finally {


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