[HADOOP-99] task trackers can only be assigned one task every heartbeat

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.1.0
• Fix Version/s: 0.4.0
• Assignee: Owen O'Malley
• Reporter: Owen O'Malley
• Created: 23/Mar/06 19:30
• Updated: 08/Jul/09 20:51
• Resolved: 29/Jun/06 04:43

Description

Task trackers only call pollForNewTask once per a heartbeat (10 seconds) rather than when a task finishes. Especially for quick maps this means that the cluster is under utilized, because each map finishes in a cycle and the task tracker never gets a second, third or fourth task to run.

Issue Links

• is duplicated by: HADOOP-305 tasktracker waits for 10 seconds for asking for a task.