[HADOOP-1068] Improve error message for 0 datanode case

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.12.0
• Fix Version/s: 0.13.0
• Assignee: Dhruba Borthakur
• Reporter: Owen O'Malley
• Created: 06/Mar/07 15:35
• Updated: 08/Jul/09 16:42
• Resolved: 25/Mar/07 11:17

Description

A user got the error message:

org.apache.hadoop.ipc.RemoteException: java.io.IOException: failed to create
file /user/root/rand-input/part000000 on client localhost.localdomain
because target-length is 0, below MIN_REPLICATION (1)

A better error message for 0 targets would be something like:
The cluster has no datanodes for creating file /user/root/rand-input/part000000.