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[SPARK-23991][DSTREAMS] Fix data loss when WAL write fails in allocat…
…eBlocksToBatch When blocks tried to get allocated to a batch and WAL write fails then the blocks will be removed from the received block queue. This fact simply produces data loss because the next allocation will not find the mentioned blocks in the queue. In this PR blocks will be removed from the received queue only if WAL write succeded. Additional unit test. Author: Gabor Somogyi <[email protected]> Closes #21430 from gaborgsomogyi/SPARK-23991. Change-Id: I5ead84f0233f0c95e6d9f2854ac2ff6906f6b341 (cherry picked from commit aca65c6) Signed-off-by: jerryshao <[email protected]>
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