[HADOOP-4141] ScriptBasedMapping has infinite loop with invalid jobconf parameter

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.18.1
• Fix Version/s: 0.20.0
• Hadoop Flags: Reviewed
• Assignee: Aaron Kimball
• Reporter: Aaron Kimball
• Created: 10/Sep/08 00:38
• Updated: 23/Apr/09 19:17
• Resolved: 14/Nov/08 19:20

Description

A few bugs in ScriptBasedTopology:

1) topology.script.number.args is not validated; if this is <= 0, the runResolveCommand() method will run its outer loop an infinite number of times.

2) CachedDNSToSwitchMapping assumes that if a List is returned, it has the same cardinality as the number of names. ScriptBasedMapping should return 'null' instead of a mis-sized list on error