Github user uce commented on a diff in the pull request:
https://github.com/apache/flink/pull/3377#discussion_r104394092
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/ExecutionGraph.java
---
@@ -1311,6 +1311,19 @@ public boolean updateState(TaskExecutionState state)
{
}
}
+ private Map<String, Accumulator<?, ?>>
deserializeAccumulators(TaskExecutionState state) {
--- End diff --
I've checked that returning `null` is the same behaviour as in
`accumulators.deserializeUserAccumulators(userClassLoader)`. In general it
would be good to add annotations for `@Nullable` return types or simply return
empty collections, but that's an orthogonal change.
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