mihaibudiu commented on code in PR #3567:
URL: https://github.com/apache/calcite/pull/3567#discussion_r1417856456
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core/src/main/java/org/apache/calcite/util/ReflectUtil.java:
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@@ -450,7 +450,8 @@ E extends Object> ReflectiveVisitDispatcher<R, E>
createDispatcher(
Method method = map.get(key);
if (method == null) {
if (map.containsKey(key)) {
- // We already looked for the method and found nothing.
+ // We should get again because it may be putted an object by
another thread.
Review Comment:
Does this solve the race or just reduce the window of vulnerability?
The right way to do this is with some locking mechanism.
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