HyukjinKwon commented on issue #24688: [SPARK-26145][SQL] Support Hive 3.0 metastore URL: https://github.com/apache/spark/pull/24688#issuecomment-495347152 I don't exactly remember each because I noticed them when I worked on in previous company. Hadoop 3 issues can be found from the history about why Spark has decided Hadoop 3.2 for now, for instance, see https://issues.apache.org/jira/browse/SPARK-23534. For Hive 3, virtually the critical fixes between Hive 3.0 and 3.1.
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