[MAPREDUCE-722] More slots are getting reserved for HiRAM job tasks then required

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.21.0
• Component/s: capacity-sched

Environment

Cluster MR capacity=248/248 Map slot size=1500 mb and reduce slot size=2048 mb. Total number of nodes=124
4 queues each having Capacity=25% User Limit=100%.

• Hadoop Flags: Reviewed
• Assignee: Vinod Kumar Vavilapalli
• Reporter: Karam Singh
• Created: 07/Jul/09 08:27
• Updated: 24/Aug/10 21:14
• Resolved: 07/Jul/09 17:02

Description

Submitted a normal job with map=124=reduces
After submitted High RAM with maps=31=reduces map.memory=1800 reduce.memory=2800
Again 3 job maps=124=reduces
total of 248 slots were reserved for both maps and reduces for High Job which much higher then required.
Is observed in Hadoop 0.20.0