yyanyy commented on a change in pull request #2258:
URL: https://github.com/apache/iceberg/pull/2258#discussion_r583317366
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File path: core/src/main/java/org/apache/iceberg/BaseFile.java
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@@ -434,7 +433,7 @@ public Integer sortOrderId() {
if (map != null) {
Map<K, V> copy = Maps.newHashMapWithExpectedSize(map.size());
copy.putAll(map);
- return Collections.unmodifiableMap(copy);
Review comment:
I suspect that this was for defensive copy, are there any other
unmodifiableMap/immutable map implementations that do not cause kryo
serialization problem? Or is it possible to register extra kryo serializers in
Flink so that we don't potentially run into similar problem in the future?
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