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用spark读取Multilple json模式

amazon-emr hadoop2 amazon-web-services scala json

2

Kannaiyan · 技术社区 · 7 年前

软件配置:

Hadoop distribution:Amazon 2.8.3
Applications:Hive 2.3.2, Pig 0.17.0, Hue 4.1.0, Spark 2.3.0

val df=spark.read.option(“合并架构”,

抛出错误,

org.apache.spark.sql.AnalysisException: Unable to infer schema for JSON. It must be specified manually.;
  at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$9.apply(DataSource.scala:207)
  at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$9.apply(DataSource.scala:207)
  at scala.Option.getOrElse(Option.scala:121)
  at org.apache.spark.sql.execution.datasources.DataSource.getOrInferFileFormatSchema(DataSource.scala:206)
  at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:392)
  at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:239)
  at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:227)
  at org.apache.spark.sql.DataFrameReader.json(DataFrameReader.scala:397)
  at org.apache.spark.sql.DataFrameReader.json(DataFrameReader.scala:340)

如何用spark读取带有多个模式的json?

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