Clearing the API key cache failed please clear the caches manually – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.16-8.9

Briefly, this error occurs when Elasticsearch is unable to automatically clear the API key cache due to some internal issues. This could be due to a lack of permissions, a network issue, or a system failure. To resolve this issue, you can manually clear the cache by using the Clear API key cache API. Alternatively, you can restart the Elasticsearch node to refresh the system and clear all caches. If the problem persists, check the system logs for more detailed error information.

This guide will help you check for common problems that cause the log ” clearing the API key cache failed; please clear the caches manually ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, cache.

Log Context

Log “clearing the API key cache failed; please clear the caches manually” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  @Override
 public void onFailure(Exception e) {
 logger.error(() -> format("unable to clear API key cache [%s]"; clearApiKeyCacheRequest.cacheName()); e);
 listener.onFailure(new ElasticsearchException("clearing the API key cache failed; please clear the caches manually"; e));
 }  /**


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