961c85166a
### What changes were proposed in this pull request? In many real-world cases, when interacting with hive catalog through Spark SQL, users may just share the `hive-site.xml` for their hive jobs and make a copy to `SPARK_HOME`/conf w/o modification. In Spark, when we generate Hadoop configurations, we will use `spark.buffer.size(65536)` to reset `io.file.buffer.size(4096)`. But when we load the hive-site.xml, we may ignore this behavior and reset `io.file.buffer.size` again according to `hive-site.xml`. 1. The configuration priority for setting Hadoop and Hive config here is not right, while literally, the order should be `spark > spark.hive > spark.hadoop > hive > hadoop` 2. This breaks `spark.buffer.size` congfig's behavior for tuning the IO performance w/ HDFS if there is an existing `io.file.buffer.size` in hive-site.xml ### Why are the changes needed? bugfix for configuration behavior and fix performance regression by that behavior change ### Does this PR introduce _any_ user-facing change? this pr restores silent user face change ### How was this patch tested? new tests Closes #31460 from yaooqinn/SPARK-34346. Authored-by: Kent Yao <yao@apache.org> Signed-off-by: HyukjinKwon <gurwls223@apache.org> |
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