[HDFS-4137] BlockManager.chooseTarget's error message can be confusing

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.0.2-alpha
• Target Version/s: 2.0.3-alpha
• Assignee: Unassigned
• Reporter: Jean-Daniel Cryans
• Created: 01/Nov/12 21:13
• Updated: 05/Nov/12 16:16

Description

Consider this message:

org.apache.hadoop.ipc.RemoteException(java.io.IOException): File somefile could only be replicated to 0 nodes instead of minReplication (=1). There are 1 datanode(s) running and no node(s) are excluded in this operation.

Obviously a node was excluded but not in the sense that the Datanode treats it. Considering that this is a message that noobs will see a lot, making it clearer will be a win.