[MAPREDUCE-3399] ContainerLocalizer should request new resources after completing the current one

• Type: Sub-task
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.1
• Component/s: mrv2, nodemanager
• Target Version/s: 0.23.1
• Hadoop Flags: Reviewed
• Release Note: Modified ContainerLocalizer to send a heartbeat to NM immediately after downloading a resource instead of always waiting for a second.
• Assignee: Siddharth Seth
• Reporter: Siddharth Seth
• Created: 15/Nov/11 05:29
• Updated: 05/Mar/12 02:49
• Resolved: 27/Dec/11 18:28

Description

Currently, the ContainerLocalizer to NM heartbeats to the NM every second. Not very significant, but this causes a ~4second delay in jobs (job jar, splits, etc). Instead, it should heartbeat to ask for additional resources to localize as soon as the previous one is localzied. There's already a TODO in the ContainerLocalizer for this.