leventov commented on a change in pull request #6662: Double-checked locking
bugs
URL: https://github.com/apache/incubator-druid/pull/6662#discussion_r238479389
##########
File path:
processing/src/main/java/org/apache/druid/query/aggregation/post/JavaScriptPostAggregator.java
##########
@@ -87,8 +89,13 @@ public double apply(Object[] args)
private final String function;
private final JavaScriptConfig config;
- // This variable is lazily initialized to avoid unnecessary JavaScript
compilation during JSON serde
- private Function fn;
+ /**
+ * The field is declared volatile in order to ensure safe publication of the
object
+ * in {@link #compile(String)} without worrying about final modifiers
+ * on the fields of the created object
Review comment:
`, see
https://github.com/apache/incubator-druid/pull/6662#discussion_r237013157`
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