lostluck opened a new pull request #12948:
URL: https://github.com/apache/beam/pull/12948
Add a touch more state to prevent race conditions on the runner side.
Retains a list of the most recent N (currently 1000) process bundle
instructions.
The flow is:
Receive ProcessBundleRequest INST-> Add INST to inactive.
Start executing INST -> remove INST from inactive and add INST to active.
Finish executing INST -> remove INST from active, add INST to inactive
if inactive queue > N, then remove the oldest inst from inactive first.
if INST failed -> also add INST to failed.
Then for either Split or Progress requests:
INST is active -> return the appropriate populated response.
INST is failed -> return the cached error
INST is inactive -> return empty response.
https://issues.apache.org/jira/browse/BEAM-10976 is tracking handling Bundle
Finalization which would require an additional queue to avoid early inactive
eviction. (or similarly to the "known but not yet started case", not have the
removal queue populated in that instance, preventing removal until after
finalization is handled.) Moot until that feature is in the SDK.
------------------------
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