[HDFS-9729] Use null to replace DataNode.EMPTY_DEL_HINT

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Component/s: datanode
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 01/Feb/16 08:38
• Updated: 27/Feb/16 00:17
• Resolved: 27/Feb/16 00:17

Description

When a delete-hint is unavailable, the current code may use null or DataNode.EMPTY_DEL_HINT as a default value. Let's uniformly use null for an empty delele-hint.

Issue Links

• is part of: HDFS-9710 Change DN to send block receipt IBRs in batches