Sandy Ryza created YARN-1128:
--------------------------------
Summary: FifoPolicy.computeShares throws NPE on empty list of
Schedulables
Key: YARN-1128
URL: https://issues.apache.org/jira/browse/YARN-1128
Project: Hadoop YARN
Issue Type: Bug
Components: scheduler
Affects Versions: 2.1.0-beta
Reporter: Sandy Ryza
FifoPolicy gives all of a queue's share to the earliest-scheduled application.
{code}
Schedulable earliest = null;
for (Schedulable schedulable : schedulables) {
if (earliest == null ||
schedulable.getStartTime() < earliest.getStartTime()) {
earliest = schedulable;
}
}
earliest.setFairShare(Resources.clone(totalResources));
{code}
If the queue has no schedulables in it, earliest will be left null, leading to
an NPE on the last line.
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