[ https://issues.apache.org/jira/browse/SPARK-4629?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yin Huai updated SPARK-4629: ---------------------------- Target Version/s: (was: 1.4.0) > Spark SQL uses Hadoop Configuration in a thread-unsafe manner when writing > Parquet files > ---------------------------------------------------------------------------------------- > > Key: SPARK-4629 > URL: https://issues.apache.org/jira/browse/SPARK-4629 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 1.1.0 > Reporter: Michael Allman > Assignee: Cheng Lian > Priority: Critical > > The method {{ParquetRelation.createEmpty}} mutates its given Hadoop > {{Configuration}} instance to set the Parquet writer compression level (cf. > https://github.com/apache/spark/blob/v1.1.0/sql/core/src/main/scala/org/apache/spark/sql/parquet/ParquetRelation.scala#L149). > This can lead to a {{ConcurrentModificationException}} when running > concurrent jobs sharing a single {{SparkContext}} which involve saving > Parquet files. > Our "fix" was to simply remove the line in question and set the compression > level in the hadoop configuration before starting our jobs. -- 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