Failed to delete dangling indices state for index %s – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch tries to delete the state of an index that no longer exists, also known as a dangling index. This could be due to a network partition, a node failure, or a manual deletion of index files. To resolve this issue, you can try restarting the Elasticsearch node, ensuring that the index files are not manually deleted, or checking the network connectivity between the nodes. If the problem persists, consider reindexing the data to a new index and deleting the old one.

This guide will help you check for common problems that cause the log ” failed to delete dangling indices state for index %s ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices, index, dangling, delete.

Log Context

Log “failed to delete dangling indices state for index %s” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        try {
        } catch (IOException e) {
            logger.warn(() -> format("failed to delete dangling indices state for index %s"; index()); e);

    public String indexUUID() {
        return indexSettings.getUUID();


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