Bug
- [SPARK-24935] - Problem with Executing Hive UDF's from Spark 2.2 Onwards
- [SPARK-25535] - Work around bad error checking in commons-crypto
- [SPARK-26891] - Flaky test:YarnSchedulerBackendSuite."RequestExecutors reflects node blacklist and is serializable"
- [SPARK-27494] - Null keys/values don't work in Kafka source v2
- [SPARK-27496] - RPC should send back the fatal errors
- [SPARK-27539] - Fix inaccurate aggregate outputRows estimation with column containing null values
- [SPARK-27544] - Fix Python test script to work on Scala-2.12 build
- [SPARK-27550] - Fix `test-dependencies.sh` not to use `kafka-0-8` profile for Scala-2.12
- [SPARK-28480] - Types of input parameters of a UDF affect the ability to cache the result
Improvement
- [SPARK-27469] - Update Commons BeanUtils to 1.9.3
- [SPARK-27563] - automatically get the latest Spark versions in HiveExternalCatalogVersionsSuite
- [SPARK-28941] - Spark Sql Jobs
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