cloud-fan opened a new pull request #23625: [SPARK-26700][CORE] enable fetch-big-block-to-memory by default URL: https://github.com/apache/spark/pull/23625 ## What changes were proposed in this pull request? This is a followup of #16989 The fetch-big-block-to-disk feature is disabled by default, because it's not compatible with external shuffle service prior to Spark 2.2. The client sends stream request to fetch block chunks, and old shuffle service can't support it. After 2 years, Spark 2.2 has EOL, and now it's safe to turn on this feature by default ## How was this patch tested? existing tests
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