AHeise commented on a change in pull request #16701:
URL: https://github.com/apache/flink/pull/16701#discussion_r682587311
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File path:
flink-core/src/main/java/org/apache/flink/api/connector/sink/Sink.java
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@@ -81,9 +83,17 @@
/** Return the serializer of the writer's state type. */
Optional<SimpleVersionedSerializer<WriterStateT>>
getWriterStateSerializer();
+ /**
+ * A list of state names of sinks from which the state can be restored.
For example, the new
+ * file sink can resume from the state of an old streaming file sink as a
drop-in replacement
+ * when resuming from a checkpoint/savepoint.
+ */
+ default Collection<String> getCompatibleStateNames() {
Review comment:
I consider it more of a bugfix ;)
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