spark 2.1.1
spark在写数据到hive外部表（底层数据在hbase中）时会报错
Caused by: java.lang.ClassCastException: org.apache.hadoop.hive.hbase.HiveHBaseTableOutputFormat cannot be cast to org.apache.hadoop.hive.ql.io.HiveOutputFormat
at org.apache.spark.sql.hive.SparkHiveWriterContainer.outputFormat$lzycompute(hiveWriterContainers.scala:82)
org.apache.spark.sql.hive.SparkHiveWriterContainer
org.apache.spark.sql.hive.SparkHiveWriterContainer
@transient private lazy val outputFormat = conf.value.getOutputFormat.asInstanceOf[HiveOutputFormat[AnyRef, Writable]]
报错的是这一句，查看代码发现此时这个变量并没有什么用处，可以在不能cast时置为null
@transient private lazy val outputFormat =
// conf.value.getOutputFormat.asInstanceOf[HiveOutputFormat[AnyRef, Writable]]
conf.value.getOutputFormat match {
case format if format.isInstanceOf[HiveOutputFormat[AnyRef, Writable]] => format.asInstanceOf[HiveOutputFormat[AnyRef, Writable]]
case _ => null
}
问题解决，官方讨论如下： https://issues.apache.org/jira/browse/SPARK-6628