`ConcurrentSkipListMap.containsKey()` is implemented as below:
```
public boolean containsKey(Object key) {
return doGet(key) != null;
}
```and this can cause the race condition if we remove `lock` of this class that the segment exists when `containsKey()` is called but doesn't exist when `get()` gets called in the below. [ Full content available at: https://github.com/apache/incubator-druid/pull/6094 ] This message was relayed via gitbox.apache.org for [email protected]
