[MAPREDUCE-6353] Divide by zero error in MR AM when calculating available containers

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: mr-am
• Hadoop Flags: Reviewed
• Assignee: Anubhav Dhoot
• Reporter: Anubhav Dhoot
• Created: 03/May/15 14:10
• Updated: 30/Aug/16 01:17
• Resolved: 09/May/15 21:47

Description

When running a sleep job with zero CPU vcores i see the following exception

2015-04-30 06:41:06,954 ERROR [RMCommunicator Allocator] org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator: ERROR IN CONTACTING RM.
java.lang.ArithmeticException: / by zero
at org.apache.hadoop.mapreduce.v2.app.rm.ResourceCalculatorUtils.computeAvailableContainers(ResourceCalculatorUtils.java:38)
at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.assign(RMContainerAllocator.java:947)
at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.access$200(RMContainerAllocator.java:840)
at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.heartbeat(RMContainerAllocator.java:247)
at org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator$1.run(RMCommunicator.java:282)
at java.lang.Thread.run(Thread.java:745)