Jark Wu created FLINK-12351:
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Summary: AsyncWaitOperator should deep copy StreamElement when
object reuse is enabled
Key: FLINK-12351
URL: https://issues.apache.org/jira/browse/FLINK-12351
Project: Flink
Issue Type: Bug
Reporter: Jark Wu
Fix For: 1.9.0
Currently, AsyncWaitOperator directly put the input StreamElement into
{{StreamElementQueue}}. But when object reuse is enabled, the StreamElement is
reused, which means the element in {{StreamElementQueue}} will be modified. As
a result, the output of AsyncWaitOperator might be wrong.
An easy way to fix this might be deep copy the input StreamElement when object
reuse is enabled, like this:
https://github.com/apache/flink/blob/blink/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/async/AsyncWaitOperator.java#L209
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