Apache Spark 3.0 第一个稳定版发布，终于可以在生产环境中使用啦！

Apache Spark 3.0.1 Release Note：https://spark.apache.org/releases/spark-release-3-0-1.html
所有修改的 ISSUE 参见：https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12315420&version=12347862
Apache Spark 3.0.1 下载地址：https://spark.apache.org/downloads.html

[SPARK-26905]: Revisit reserved/non-reserved keywords based on the ANSI SQL standard

[SPARK-31220]: repartition obeys spark.sql.adaptive.coalescePartitions.initialPartitionNum when spark.sql.adaptive.enabled

[SPARK-31703]: Changes made by SPARK-26985 break reading parquet files correctly in BigEndian architectures (AIX + LinuxPPC64)

[SPARK-31915]: Resolve the grouping column properly per the case sensitivity in grouped and cogrouped pandas UDFs

[SPARK-31923]: Event log cannot be generated when some internal accumulators use unexpected types

[SPARK-31935]: Hadoop file system config should be effective in data source options

[SPARK-31968]: write.partitionBy() creates duplicate subdirectories when user provides duplicate columns

[SPARK-31983]: Tables of structured streaming tab show wrong result for duration column

[SPARK-32003]: Shuffle files for lost executor are not unregistered if fetch failure occurs after executor is lost

[SPARK-32038]: Regression in handling NaN values in COUNT(DISTINCT)

[SPARK-32073]: Drop R < 3.5 support

[SPARK-32092]: CrossvalidatorModel does not save all submodels (it saves only 3)

[SPARK-32136]: Spark producing incorrect groupBy results when key is a struct with nullable properties

[SPARK-32148]: LEFT JOIN generating non-deterministic and unexpected result (regression in Spark 3.0)

[SPARK-32220]: Cartesian Product Hint cause data error

[SPARK-32310]: ML params default value parity

[SPARK-32339]: Improve MLlib BLAS native acceleration docs

[SPARK-32424]: Fix silent data change for timestamp parsing if overflow happens

[SPARK-32451]: Support Apache Arrow 1.0.0 in SparkR

[SPARK-32456]: Check the Distinct by assuming it as Aggregate for Structured Streaming

[SPARK-32608]: Script Transform DELIMIT value should be formatted

[SPARK-32646]: ORC predicate pushdown should work with case-insensitive analysis

[SPARK-32676]: Fix double caching in KMeans/BiKMeans

值得关注的修改

已知的问题