Hong Zhiguo created YARN-2761: --------------------------------- Summary: potential race condition in SchedulingPolicy Key: YARN-2761 URL: https://issues.apache.org/jira/browse/YARN-2761 Project: Hadoop YARN Issue Type: Bug Components: fairscheduler Reporter: Hong Zhiguo Assignee: Hong Zhiguo Priority: Minor
reported by findbug. In SchedulingPolicy.getInstance, ConcurrentHashMap.get and ConcurrentHashMap.put is called. These two operations together should be atomic, but using ConcurrentHashMap doesn't guarantee this. {code} public static SchedulingPolicy getInstance(Class<? extends SchedulingPolicy> clazz) { SchedulingPolicy policy = instances.get(clazz); if (policy == null) { policy = ReflectionUtils.newInstance(clazz, null); instances.put(clazz, policy); } return policy; } {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)