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https://issues.apache.org/jira/browse/SPARK-13137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-13137:
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Assignee: Apache Spark
> NullPoingException in schema inference for CSV when the first line is empty
> ---------------------------------------------------------------------------
>
> Key: SPARK-13137
> URL: https://issues.apache.org/jira/browse/SPARK-13137
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Hyukjin Kwon
> Assignee: Apache Spark
>
> When the first line is empty and it tries to infer schema, this emits the
> exception below:
> {code}
> java.lang.NullPointerException was thrown.
> java.lang.NullPointerException
> at
> scala.collection.mutable.ArrayOps$ofRef$.length$extension(ArrayOps.scala:114)
> at scala.collection.mutable.ArrayOps$ofRef.length(ArrayOps.scala:114)
> at
> scala.collection.IndexedSeqOptimized$class.zipWithIndex(IndexedSeqOptimized.scala:93)
> at
> scala.collection.mutable.ArrayOps$ofRef.zipWithIndex(ArrayOps.scala:108)
> at
> org.apache.spark.sql.execution.datasources.csv.CSVRelation.inferSchema(CSVRelation.scala:137)
> at
> org.apache.spark.sql.execution.datasources.csv.CSVRelation.dataSchema$lzycompute(CSVRelation.scala:50)
> at
> org.apache.spark.sql.execution.datasources.csv.CSVRelation.dataSchema(CSVRelation.scala:48)
> at
> org.apache.spark.sql.sources.HadoopFsRelation.schema$lzycompute(interfaces.scala:666)
> at
> org.apache.spark.sql.sources.HadoopFsRelation.schema(interfaces.scala:665)
> at
> org.apache.spark.sql.execution.datasources.LogicalRelation.<init>(LogicalRelation.scala:39)
> at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:115)
> at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:125)
> {code}
> This looks because it fails to skip the empty lines in {{findFirstLine()}} at
> {{CSVRelation}}.
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