OtterMind/Chat2DB · error · IllegalArgumentException

Unsupported provider:

Error message

Unsupported provider: 

What it means

Thrown as IllegalArgumentException('Unsupported provider: ' + runtimeModel.getProvider()) by validateRuntimeModel when AiProviderEnum.from(provider) returns null. from() uppercases and trims, returning null for empty/unknown values; the only accepted providers are OPENAI, CLAUDE, GEMINI, MINIMAX. The provider passed validation as non-null but is not a recognized enum constant.

Source

Thrown at chat2db-community-server/chat2db-community-domain/chat2db-community-domain-core/src/main/java/ai/chat2db/community/domain/core/impl/ai/AiModelConfigServiceImpl.java:365

            return;
        }
        if (provider == AiProviderEnum.GEMINI) {
            runtimeModel.setProjectId(defaultValue(trimToNull(runtimeModel.getProjectId()), trimToNull(System.getenv("GOOGLE_CLOUD_PROJECT"))));
            runtimeModel.setLocation(defaultValue(trimToNull(runtimeModel.getLocation()), trimToNull(System.getenv("GOOGLE_CLOUD_LOCATION"))));
            runtimeModel.setLocation(defaultValue(runtimeModel.getLocation(), DEFAULT_GEMINI_LOCATION));
        }
    }

    private void validateRuntimeModel(AiRuntimeModel runtimeModel) {
        if (Objects.isNull(runtimeModel.getProvider())) {
            throw new IllegalArgumentException("provider is required");
        }
        if (StringUtils.isBlank(runtimeModel.getModel())) {
            throw new IllegalArgumentException("model is required");
        }
        AiProviderEnum provider = AiProviderEnum.from(runtimeModel.getProvider());
        if (provider == null) {
            throw new IllegalArgumentException("Unsupported provider: " + runtimeModel.getProvider());
        }
        if (provider == AiProviderEnum.OPENAI || provider == AiProviderEnum.CLAUDE) {
            return;
        }
        if (provider == AiProviderEnum.GEMINI) {
        }
    }


    private synchronized void loadFromDisk() {
        if (!Files.exists(storagePath)) {
            return;
        }
        try {
            StorageData data = objectMapper.readValue(storagePath.toFile(), StorageData.class);
            Map<Long, List<AiModelConfig>> loadedConfigMap = new HashMap<>();
            if (CollectionUtils.isNotEmpty(data.getConfigs())) {
                data.getConfigs().forEach(config -> {

View on GitHub (pinned to 5ee1e990e7)

Solutions

1. Use one of the supported provider constants exactly: OPENAI, CLAUDE, GEMINI, or MINIMAX (case/whitespace insensitive).
2. For OpenAI-compatible self-hosted endpoints, use provider OPENAI with a custom baseUrl rather than a custom provider string.
3. If you genuinely need a new provider, add it to AiProviderEnum and implement its applyProviderDefaults branch.

Example fix

// before
resolve.setProvider("ollama"); // not in enum

// after - use OPENAI provider with a local base url for ollama-style endpoints
resolve.setProvider("OPENAI");
resolve.setBaseUrl("http://127.0.0.1:11434/v1");
resolve.setModel("llama3");
resolve.setApiKey("ollama"); // placeholder required by client

String provider = runtimeModel.getProvider();
AiProviderEnum p = AiProviderEnum.from(provider);
if (p == null) {
    return ResponseEntity.badRequest()
        .body("unsupported provider '" + provider + "'; use OPENAI/CLAUDE/GEMINI/MINIMAX");
}

static boolean isSupportedProvider(String provider) {
    return AiProviderEnum.from(provider) != null;
}

try {
    service.validateRuntimeModel(m);
} catch (IllegalArgumentException e) {
    if (e.getMessage() != null && e.getMessage().startsWith("Unsupported provider:")) {
        return ResponseEntity.badRequest().body(e.getMessage());
    }
    throw e;
}

When it happens

Trigger: runtimeModel.getProvider() is a non-null, non-blank string that does not match any AiProviderEnum constant after trim+uppercase: e.g. 'AZURE', 'OPENROUTER', 'ollama', 'mistral', or a typo like 'OPENAI ' is fine (trimmed) but 'OPEN_AI' fails.

Common situations: User typed a custom provider string not in the enum; a config imported from another tool carries an unsupported provider; a new provider was added to the UI list without adding it to AiProviderEnum; casing/whitespace variants are tolerated but synonyms are not.

Related errors

• ai.model.config.required
• provider is required
• model is required
• The baseURL is not valid!
• The baseURL is not valid!

AI-assisted analysis of OtterMind/Chat2DB@5ee1e990e7 (2026-08-14). Data as JSON: /api/errors/4c8f0e6be583c056. Report an issue: GitHub.