Luke Chen created KAFKA-13264:
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Summary: backwardFetch in InMemoryWindowStore doesn't return in
reverse order
Key: KAFKA-13264
URL: https://issues.apache.org/jira/browse/KAFKA-13264
Project: Kafka
Issue Type: Bug
Components: streams
Affects Versions: 2.8.0
Reporter: Luke Chen
Assignee: Luke Chen
When working on another PR, I found currently, the backwardFetch in
InMemoryWindowStore doesn't return in reverse order when there are records in
the same window.
ex: window size = 500,
input records:
key: "a", value: "aa", timestamp: 0 ==> will be in [0, 500\] window
key: "b", value: "bb", timestamp: 10 ==> will be in [0, 500\] window
when fetch in forward order:
"a" -> "b", which is expected
when fetch in backward order:
"a" -> "b", which is NOT expected
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