Dan Bress created FLINK-5011:
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Summary: TraversableSerializer does not perform a deep copy of the elements it is traversing
Key: FLINK-5011
URL:
https://issues.apache.org/jira/browse/FLINK-5011 Project: Flink
Issue Type: Bug
Components: Core
Affects Versions: 1.1.3
Reporter: Dan Bress
I had an issue where the state in my rolling window was incorrectly being maintained from window to window. The initial state of my window looked like this:
Map[Key, MutableValue] = {("A", Value(0)}, ("B", Value(0)}
and I saw the MutableValue's being preserved across windows rather than going back to zero.
It looks like [TraversableSerializer|
https://github.com/apache/flink/blob/master/flink-scala/src/main/scala/org/apache/flink/api/scala/typeutils/TraversableSerializer.scala#L65-L69] is doing a shallow copy of the elements in the traversable instead of a deep copy
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