apache/hadoop · error · IllegalArgumentException

Failed to initialize {customTokenProviderClass}

Error message

Failed to initialize {customTokenProviderClass}

What it means

Error "Failed to initialize {customTokenProviderClass}" thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AbfsConfiguration.java:1591

        throw new TokenAccessProviderException("Unable to load OAuth token provider class.", e);
      }

    } else if (authType == AuthType.Custom) {
      try {
        String configKey = FS_AZURE_ACCOUNT_TOKEN_PROVIDER_TYPE_PROPERTY_NAME;

        Class<? extends CustomTokenProviderAdaptee> customTokenProviderClass
            = getTokenProviderClass(authType, configKey, null,
            CustomTokenProviderAdaptee.class);

        if (customTokenProviderClass == null) {
          throw new IllegalArgumentException(
                  String.format("The configuration value for \"%s\" is invalid.", configKey));
        }
        CustomTokenProviderAdaptee azureTokenProvider = ReflectionUtils
                .newInstance(customTokenProviderClass, rawConfig);
        if (azureTokenProvider == null) {
          throw new IllegalArgumentException("Failed to initialize " + customTokenProviderClass);
        }
        LOG.trace("Initializing {}", customTokenProviderClass.getName());
        azureTokenProvider.initialize(rawConfig, accountName);
        LOG.trace("{} init complete", customTokenProviderClass.getName());
        return new CustomTokenProviderAdapter(azureTokenProvider, getCustomTokenFetchRetryCount());
      } catch(IllegalArgumentException e) {
        throw e;
      } catch (Exception e) {
        throw new TokenAccessProviderException("Unable to load custom token provider class: " + e, e);
      }

    } else {
      throw new TokenAccessProviderException(String.format(
              "Invalid auth type: %s is being used, expecting OAuth", authType));
    }
  }

  /**

View on GitHub (pinned to 2add963021)

Solutions

1. Ensure the custom token provider class is public, instantiable, and on the classpath; check the logged cause.

When it happens

Trigger: Thrown at hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AbfsConfiguration.java:1591 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/b421826bdaa863f2. Report an issue: GitHub.