[HDFS-5766] In DFSInputStream, do not add datanode to deadNodes after InvalidEncryptionKeyException in fetchBlockByteRange

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 2.3.0
• Component/s: hdfs-client
• Assignee: Liang Xie
• Reporter: Liang Xie
• Created: 14/Jan/14 09:38
• Updated: 12/May/16 18:16
• Resolved: 15/Jan/14 19:24

Description

Found this issue when i read fetchBlockByteRange code:
If we hit InvalidEncryptionKeyException, current logic is:
1) reduce the retry count
2) clearDataEncryptionKey
3) addToDeadNodes
4) retry in another loop...

If i am correct, we should treat InvalidEncryptionKeyException similar with InvalidBlockToken branch, bypassing addToDeadNodes(), since it's a client related, not caused by DN side