Github user kl0u commented on a diff in the pull request:
https://github.com/apache/flink/pull/3945#discussion_r117477471
--- Diff:
flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/NFA.java ---
@@ -930,6 +930,7 @@ public void serialize(NFA<T> record, DataOutputView
target) throws IOException {
timestampSerializer.serialize(computationState.getTimestamp(), target);
versionSerializer.serialize(computationState.getVersion(), target);
timestampSerializer.serialize(computationState.getStartTimestamp(), target);
+ target.writeInt(computationState.getCounter());
--- End diff --
The `counter` field was introduced in Flink 1.3 and the new serializer is
only used in Flink 1.3. Before it was Java Serialization, so if you see in the
`readComputationState()` we create a computation state with 0.
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