Invalid token document – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.2-8.9

Briefly, this error occurs when Elasticsearch encounters an invalid token in a document during indexing or querying. This could be due to incorrect formatting, unsupported characters, or a mismatch in the expected data type. To resolve this issue, you can: 1) Check the document for any invalid or unsupported characters and remove or replace them. 2) Ensure the document is correctly formatted according to Elasticsearch’s requirements. 3) Verify that the data types in your document match those expected by your Elasticsearch schema.

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

Log Context

Log “invalid token document” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 final Consumer onFailure = ex -> listener.onFailure(traceLog("refresh token"; tokenDocId; ex));
 final Tuple> checkRefreshResult;
 try {
 checkRefreshResult = checkTokenDocumentForRefresh(refreshRequested; clientAuth; source);
 } catch (DateTimeException | IllegalStateException e) {
 onFailure.accept(new ElasticsearchSecurityException("invalid token document"; e));
 if (checkRefreshResult.v2().isPresent()) {