[HDFS-13885] Add debug logs in dfsclient around decrypting EDEK

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0
• Fix Version/s: 3.2.0
• Component/s: hdfs-client
• Target Version/s: 3.2.0
• Hadoop Flags: Reviewed
• Assignee: Kitti Nanasi
• Reporter: Kitti Nanasi
• Created: 30/Aug/18 14:26
• Updated: 04/Sep/18 06:01
• Resolved: 04/Sep/18 05:38

Description

We want to know from the hdfs client log (e.g. hbase RS logs) for each CryptoOutputstream, approximately when does the decrypt happen and when does the file read happen, to help us rule out or identify hdfs NN / kms / DN being slow.