hchaverri opened a new pull request, #5159:
URL: https://github.com/apache/hadoop/pull/5159

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   ### Description of PR
   These changes follow the same logic used in the existing ZK based secret 
manager implementation.
   1. Minor changes to DelegationTokenInformation class so it's easier to 
convert to byte array format.
   2. SQLDelegationTokenSecretManager transforms tokens and delegation keys 
into expected format and delegates the storage operations to the implementation 
class.
   3. SQLDelegationTokenSecretManagerImpl interacts with SQL storage.
   4. DistributedSQLCounter is used to manage sequenceNumbers and 
delegationKeyIds in a distributed way.
   5. Including SQL schema files to create sample database, tables and users.
   
   ### How was this patch tested?
   1. Executed operations for token creation, renewal and cancellation. 
Compared results with existing ZK implementation.
   
   ### For code changes:
   
   - [ ] Does the title or this PR starts with the corresponding JIRA issue id 
(e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] Object storage: have the integration tests been executed and the 
endpoint declared according to the connector-specific documentation?
   - [ ] If adding new dependencies to the code, are these dependencies 
licensed in a way that is compatible for inclusion under [ASF 
2.0](http://www.apache.org/legal/resolved.html#category-a)?
   - [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`, 
`NOTICE-binary` files?
   
   


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