Job should fail if a reduce task can't be scheduled anywhere
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Key: MAPREDUCE-2324
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2324
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.20.2
Reporter: Todd Lipcon
If there's a reduce task that needs more disk space than is available on any
mapred.local.dir in the cluster, that task will stay pending forever. For
example, we produced this in a QA cluster by accidentally running terasort with
one reducer - since no mapred.local.dir had 1T free, the job remained in
pending state for several days. The reason for the "stuck" task wasn't clear
from a user perspective until we looked at the JT logs.
Probably better to just fail the job if a reduce task goes through all TTs and
finds that there isn't enough space.
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