Unknown role parser getText on node nodeId – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.5

Briefly, this error occurs when Elasticsearch encounters an unknown role parser while processing a request on a specific node. This could be due to a misconfiguration or a missing plugin that provides the role parser. To resolve this issue, you can check the Elasticsearch configuration for any errors, ensure that all necessary plugins are installed and up-to-date, or try restarting the Elasticsearch node. If the error persists, you may need to check the version compatibility between your Elasticsearch nodes and any plugins or tools you are using.

This guide will help you check for common problems that cause the log ” unknown role [” + parser.getText() + “] on node [” + nodeId + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: client, parser.

Log Context

Log “unknown role [” + parser.getText() + “] on node [” + nodeId + “]” classname is ElasticsearchNodesSniffer.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                        case "ingest":
                            ingest = true;
                            logger.warn("unknown role [" + parser.getText() + "] on node [" + nodeId + "]");
                } else {


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