[HDFS-7419] Improve error messages for DataNode hot swap drive feature

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.1
• Fix Version/s: 2.7.0
• Component/s: datanode
• Target Version/s: 2.7.0
• Assignee: Lei (Eddy) Xu
• Reporter: Lei (Eddy) Xu
• Created: 21/Nov/14 01:49
• Updated: 10/Apr/15 20:29
• Resolved: 24/Nov/14 19:12

Description

When DataNode fails to add a volume, it adds one failure message to errorMessageBuilder in DataNode#refreshVolumes. However, the detailed error messages are not logged in DataNode's log and they are emitted from clients.

This JIRA makes DataNode reports detailed failure in its log.