je-ik commented on a change in pull request #15994:
URL: https://github.com/apache/beam/pull/15994#discussion_r768150686
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File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/state/FlinkStateInternals.java
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@@ -215,6 +216,22 @@ public void clearGlobalState() {
}
}
+ public List<ByteBuffer> getGlobalWindowStateKeys() {
Review comment:
:-)
That's spot on. I think we need to cache seen windows (key-aligned in common
key) in the state backend. Looks like we otherwise cannot reliably restore the
set of ''active' windows after recovery from checkpoint.
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