[HADOOP-583] DFSClient should use debug level to log missing data-node.

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.7.0
• Fix Version/s: 0.8.0
• Assignee: Konstantin Shvachko
• Reporter: Konstantin Shvachko
• Created: 06/Oct/06 23:08
• Updated: 08/Jul/09 16:41
• Resolved: 16/Oct/06 22:12

Description

When DFSClient cannot read a block replica it logs a message saying
"Failed to connect to <target> ..." + exception
and then tries other replicas. If the client succeeds with another replica this
is only record that the log will contain. This seems to be confusing for users.
So I propose to use debug logging level here.
I also stringified exceptions.