[FLINK-18205] Mitigate the use of reflection in HadoopModule and Utils

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Component/s: Deployment / YARN
• Labels: pull-request-available
• Assignee: Yangze Guo
• Reporter: Yangze Guo
• Created: 09/Jun/20 07:44
• Updated: 30/Nov/21 20:37
• Resolved: 19/Jun/20 13:13

Description

Since Flink drops support for Hadoop 1 since FLINK-4895, it would be good to mitigate the use of reflection in HadoopModule. To be specific, we could make sure the following methods exist in Hadoop 2+:

• Credentials#getAllTokens
• Credentials#readTokenStorageFile
• UserGroupInformation#addCredentials

Issue Links

• links to: GitHub Pull Request #12624