[MAPREDUCE-3815] Data Locality suffers if the AM asks for containers using IPs instead of hostnames

• Type: Sub-task
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.1
• Component/s: mrv2
• Target Version/s: 0.23.1
• Hadoop Flags: Reviewed
• Release Note: Fixed MR AM to always use hostnames and never IPs when requesting containers so that scheduler can give off data local containers correctly.
• Assignee: Siddharth Seth
• Reporter: Siddharth Seth
• Created: 06/Feb/12 04:20
• Updated: 05/Mar/12 02:49
• Resolved: 07/Feb/12 22:00

Description

BlockLocation.getHosts() returns IP addresses occasionally. Data locality is affected - since the RM requires hostnames.

Issue Links

• blocks: MAPREDUCE-3524 Scan benchmark is more than 1.5x slower in 0.23