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Yin Huai commented on SPARK-8093: --------------------------------- With https://github.com/apache/spark/pull/6799, we have changed the behavior back to Spark 1.3's behavior. Empty inner structs will not be in the schema. > Spark 1.4 branch's new JSON schema inference has changed the behavior of > handling inner empty JSON object. > ---------------------------------------------------------------------------------------------------------- > > Key: SPARK-8093 > URL: https://issues.apache.org/jira/browse/SPARK-8093 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 1.4.0 > Reporter: Harish Butani > Assignee: Nathan Howell > Priority: Critical > Fix For: 1.4.1, 1.5.0 > > Attachments: t1.json > > > This is similar to SPARK-3365. Sample json is attached. Code to reproduce > {code} > var jsonDF = read.json("/tmp/t1.json") > jsonDF.write.parquet("/tmp/t1.parquet") > {code} > The 'integration' object is empty in the json. > StackTrace: > {code} > .... > Caused by: java.io.IOException: Could not read footer: > java.lang.IllegalStateException: Cannot build an empty group > at > parquet.hadoop.ParquetFileReader.readAllFootersInParallel(ParquetFileReader.java:238) > at > org.apache.spark.sql.parquet.ParquetRelation2$MetadataCache.refresh(newParquet.scala:369) > at > org.apache.spark.sql.parquet.ParquetRelation2.org$apache$spark$sql$parquet$ParquetRelation2$$metadataCache$lzycompute(newParquet.scala:154) > at > org.apache.spark.sql.parquet.ParquetRelation2.org$apache$spark$sql$parquet$ParquetRelation2$$metadataCache(newParquet.scala:152) > at > org.apache.spark.sql.parquet.ParquetRelation2.refresh(newParquet.scala:197) > at > org.apache.spark.sql.sources.InsertIntoHadoopFsRelation.insert(commands.scala:134) > ... 69 more > Caused by: java.lang.IllegalStateException: Cannot build an empty group > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org