Minor Description
With custom `spark.sql.hive.metastore.version` and `spark.sql.hive.metastore.jars`.
Spark would use date formatter in `HiveShim` that convert `date` to `string`, if we set `spark.sql.legacy.timeParserPolicy=LEGACY` the `RebaseDateTime` code will be invoked. At that moment, if `RebaseDateTime` is initialized the first time then context class loader is `IsolatedClientLoader`. Such error msg would throw:
java.lang.IllegalArgumentException: argument "src" is null at com.fasterxml.jackson.databind.ObjectMapper._assertNotNull(ObjectMapper.java:4413) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3157) at com.fasterxml.jackson.module.scala.ScalaObjectMapper.readValue(ScalaObjectMapper.scala:187) at com.fasterxml.jackson.module.scala.ScalaObjectMapper.readValue$(ScalaObjectMapper.scala:186) at org.apache.spark.sql.catalyst.util.RebaseDateTime$$anon$1.readValue(RebaseDateTime.scala:267) at org.apache.spark.sql.catalyst.util.RebaseDateTime$.loadRebaseRecords(RebaseDateTime.scala:269) at org.apache.spark.sql.catalyst.util.RebaseDateTime$.<init>(RebaseDateTime.scala:291) at org.apache.spark.sql.catalyst.util.RebaseDateTime$.<clinit>(RebaseDateTime.scala) at org.apache.spark.sql.catalyst.util.DateTimeUtils$.toJavaDate(DateTimeUtils.scala:109) at org.apache.spark.sql.catalyst.util.LegacyDateFormatter.format(DateFormatter.scala:95) at org.apache.spark.sql.catalyst.util.LegacyDateFormatter.format$(DateFormatter.scala:94) at org.apache.spark.sql.catalyst.util.LegacySimpleDateFormatter.format(DateFormatter.scala:138) at org.apache.spark.sql.hive.client.Shim_v0_13$ExtractableLiteral$1$.unapply(HiveShim.scala:661) at org.apache.spark.sql.hive.client.Shim_v0_13.convert$1(HiveShim.scala:785) at org.apache.spark.sql.hive.client.Shim_v0_13.$anonfun$convertFilters$4(HiveShim.scala:826)
