[HDFS-9405] Warmup NameNode EDEK caches in background thread

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.1
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: encryption, namenode
• Labels: supportability
• Target Version/s: 2.8.0
• Assignee: Xiao Chen
• Reporter: Zhe Zhang
• Created: 09/Nov/15 23:18
• Updated: 23/May/18 00:29
• Resolved: 21/Mar/16 18:40

Description

generateEncryptedDataEncryptionKey involves a non-trivial I/O operation to the key provider, which could be slow or cause timeout. It should be done as a separate thread so as to return a proper error message to the RPC caller.

Issue Links

• is related to: HDFS-10516 Fix bug when warming up EDEK cache of more than one encryption zone
• relates to: HDFS-13603 Warmup NameNode EDEK thread retries continuously if there's an invalid key