dawidwys commented on a change in pull request #13405:
URL: https://github.com/apache/flink/pull/13405#discussion_r492649792
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File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/StreamOperatorStateHandler.java
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@@ -282,8 +283,8 @@ public void setCurrentKey(Object key) {
if (keyedStateBackend != null) {
try {
// need to work around type restrictions
- @SuppressWarnings("unchecked,rawtypes")
- AbstractKeyedStateBackend rawBackend =
(AbstractKeyedStateBackend) keyedStateBackend;
+ @SuppressWarnings("rawtypes")
+ CheckpointableKeyedStateBackend rawBackend =
keyedStateBackend;
rawBackend.setCurrentKey(key);
Review comment:
mine, shows it as a warning.
We are using the `CheckpointableKeyedStateBackend` as a raw type, without
the key, so there should be a warning.
The `keyedStateBackend` is of type `CheckpointableKeyedStateBackend<?>` so
we have a signature like: `setCurrentKey(? key)`, which cannot be satisfied.
Therefore we need to cast it to a raw type.
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