Github user jinxing64 commented on the issue:
https://github.com/apache/spark/pull/18211
In my cluster, we are suffering from OOM of shuffle-service.
We found that a lot of executors are fetching blocks from a single
shuffle-service. Analyzing the memory, we found that the
blockIds(shuffle_shuffleId_mapId_reduceId) takes about 1.5GBytes.
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