Chen He created YARN-2263:
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Summary: CSQueueUtils.computeMaxActiveApplicationsPerUser may
cause deadlock for nested MapReduce jobs
Key: YARN-2263
URL: https://issues.apache.org/jira/browse/YARN-2263
Project: Hadoop YARN
Issue Type: Bug
Affects Versions: 2.4.1, 0.23.10
Reporter: Chen He
computeMaxActiveApplicationsPerUser() has a lower bound "1". For a nested
MapReduce job which files new mapreduce jobs in its mapper/reducer, it will
cause job stuck.
public static int computeMaxActiveApplicationsPerUser(
int maxActiveApplications, int userLimit, float userLimitFactor) {
return Math.max(
(int)Math.ceil(
maxActiveApplications * (userLimit / 100.0f) * userLimitFactor),
1);
}
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