Unable to clear role cache – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.8

Briefly, this error occurs when Elasticsearch fails to clear the role cache due to insufficient permissions or a network issue. The role cache is used to store user roles and permissions. To resolve this issue, you can try the following: 1) Ensure the user has the necessary permissions to clear the role cache. 2) Check the network connectivity between the nodes. 3) Restart the Elasticsearch cluster to refresh the cache. 4) If the issue persists, consider increasing the role cache size in the Elasticsearch configuration.

This guide will help you check for common problems that cause the log ” unable to clear role cache ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, cache.

Log Context

Log “unable to clear role cache” classname is NativePrivilegeStore.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


                public void onFailure(Exception e) {
                    logger.error("unable to clear role cache"; e);
                        new ElasticsearchException("clearing the role cache failed. please clear the role cache manually"; e));
            }; securityClient::clearRolesCache);