Hongchao Deng created ZOOKEEPER-1978:
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Summary: Fix AT_OPERATION_SEQUENCE_ON_CONCURRENT_ABSTRACTION
Key: ZOOKEEPER-1978
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1978
Project: ZooKeeper
Issue Type: Sub-task
Reporter: Hongchao Deng
Assignee: Hongchao Deng
Priority: Minor
findbugs is complaining
{code}
if (sessionsById.get(id) == null) {
SessionImpl s = new SessionImpl(id, sessionTimeout);
sessionsById.put(id, s);
}
{code}
is not atomic for the gap between get() and put().
I suggest using putIfAbsent() instead.
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