Myasuka commented on a change in pull request #18391:
URL: https://github.com/apache/flink/pull/18391#discussion_r803767353
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File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/metadata/MetadataV2V3SerializerBase.java
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@@ -415,7 +440,7 @@ KeyedStateHandle deserializeKeyedStateHandle(
int baseSize = dis.readInt();
List<KeyedStateHandle> base = new ArrayList<>(baseSize);
for (int i = 0; i < baseSize; i++) {
- base.add(deserializeKeyedStateHandle(dis, context));
+
base.add(Preconditions.checkNotNull(deserializeKeyedStateHandle(dis, context)));
Review comment:
Since we already write the size of collection out, it's really strange
that the materialized collection having `null` as its elements. I think a check
here could act as a safety guard here.
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