Failed to retrieve reserved users – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.

Briefly, this error message indicates that Elasticsearch was unable to retrieve reserved users. The reason for this error could be a problem with the Elasticsearch instance or a problem with the reserved users configuration. To resolve the issue, the reserved users configuration should be checked for errors or Elasticsearch should be restarted.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

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

Log Context

Log “Failed to retrieve reserved users” classname is ReservedRealm.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                     users.add(anonymousUser);
                }

                listener.onResponse(users);
            }; (e) -> {
                logger.error("failed to retrieve reserved users"; e);
                listener.onResponse(anonymousEnabled ? Collections.singletonList(anonymousUser) : Collections.emptyList());
            }));
        }
    }





 

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