elastic/elasticsearch · error · IllegalArgumentException

ScriptedConditionTokenFilter [{name()}] refers to undefined

Error message

ScriptedConditionTokenFilter [{name()}] refers to undefined token filter [{filter}]

What it means

Error "ScriptedConditionTokenFilter [{name()}] refers to undefined token filter [{filter}]" thrown in elastic/elasticsearch.

Source

Thrown at modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/ScriptedConditionTokenFilterFactory.java:76

    }

    @Override
    public TokenFilterFactory getChainAwareTokenFilterFactory(
        IndexCreationContext context,
        TokenizerFactory tokenizer,
        List<CharFilterFactory> charFilters,
        List<TokenFilterFactory> previousTokenFilters,
        Function<String, TokenFilterFactory> allFilters
    ) {
        // Guard against a filter referring to itself (directly or via a cycle), which would otherwise
        // recurse until the stack overflows and takes the node down.
        allFilters = ReferringFilterResolver.enter(name(), allFilters);
        List<TokenFilterFactory> filters = new ArrayList<>();
        List<TokenFilterFactory> existingChain = new ArrayList<>(previousTokenFilters);
        for (String filter : filterNames) {
            TokenFilterFactory tff = allFilters.apply(filter);
            if (tff == null) {
                throw new IllegalArgumentException(
                    "ScriptedConditionTokenFilter [" + name() + "] refers to undefined token filter [" + filter + "]"
                );
            }
            tff = tff.getChainAwareTokenFilterFactory(context, tokenizer, charFilters, existingChain, allFilters);
            filters.add(tff);
            existingChain.add(tff);
        }

        return new TokenFilterFactory() {
            @Override
            public String name() {
                return ScriptedConditionTokenFilterFactory.this.name();
            }

            @Override
            public TokenStream create(TokenStream tokenStream) {
                Function<TokenStream, TokenStream> filter = in -> {
                    for (TokenFilterFactory tff : filters) {

View on GitHub (pinned to db6a809a66)

When it happens

Trigger: Thrown at modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/ScriptedConditionTokenFilterFactory.java:76 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of elastic/elasticsearch@db6a809a66 (2026-08-12). Data as JSON: /api/errors/55aa5e378ada8238. Report an issue: GitHub.