mridulm commented on issue #23686: [SPARK-26772][YARN] YARNHadoopDelegationTokenManager loads ServiceCredentialProviders independently URL: https://github.com/apache/spark/pull/23686#issuecomment-458839459 @vanzin We do not have an alternative for custom credential providers without this, do we ? We could expose `HadoopDelegationTokenManager` as `DeveloperApi`, add support for loading custom providers via `ServiceLoader` there (roll this fix into that class) and remove `YARNHadoopDelegationTokenManager` for 3.0 (all existing providers extend from `HadoopDelegationTokenManager` instead of `YARNHadoopDelegationTokenManager`). If that is the proposal, I am fine with that.
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