lostluck opened a new pull request #11768:
URL: https://github.com/apache/beam/pull/11768
The closed reader check, in it's current position prevents the "normal
teardown" that the reader expects. This means that readers for instructions
that terminate early such as due to splitting stay resident in memory and never
close.
In practice this is benign as the buffer would already be closed, but with
streaming this memory leak would become noticable.
This PR moves the check to after the sentinel check, and additionally check
there for early termination to avoid closing the buffer twice.
Since this largely affects the goroutine local cache, no test changes are
possible.
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