Failed to validate access token because the index – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

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

Log Context

Log “failed to validate access token because the index [” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        final SecurityIndexManager tokensIndex = getTokensIndexForVersion(userToken.getVersion());
        if (tokensIndex.indexExists() == false) {
            // index doesn't exist so the token is considered invalid as we cannot verify its validity
            logger.warn("failed to validate access token because the index [" + tokensIndex.aliasName() + "] doesn't exist");
        } else {
            final GetRequest getRequest = client
                    .prepareGet(tokensIndex.aliasName(); SINGLE_MAPPING_NAME; getTokenDocumentId(userToken)).request();
            Consumer onFailure = ex -> listener.onFailure(traceLog("check token state"; userToken.getId(); ex));


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