[ https://issues.apache.org/jira/browse/SPARK-23434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun updated SPARK-23434: ---------------------------------- Description: When Spark reads a file path (e.g. `people.json`), it warns with a wrong error message during looking up `people.json/_spark_metadata`. The root cause of this istuation is the difference between `LocalFileSystem` and `DistributedFileSystem`. `LocalFileSystem.exists()` returns `false`, but `DistributedFileSystem.exists` raises Exception. {code} scala> spark.version res0: String = 2.4.0-SNAPSHOT scala> spark.read.json("file:///usr/hdp/current/spark-client/examples/src/main/resources/people.json").show +----+-------+ | age| name| +----+-------+ |null|Michael| | 30| Andy| | 19| Justin| +----+-------+ scala> spark.read.json("hdfs:///tmp/people.json") 18/02/15 05:00:48 WARN streaming.FileStreamSink: Error while looking for metadata directory. 18/02/15 05:00:48 WARN streaming.FileStreamSink: Error while looking for metadata directory. res6: org.apache.spark.sql.DataFrame = [age: bigint, name: string] {code} {code} scala> spark.version res0: String = 2.2.1 scala> spark.read.json("hdfs:///tmp/people.json").show 18/02/15 05:28:02 WARN FileStreamSink: Error while looking for metadata directory. 18/02/15 05:28:02 WARN FileStreamSink: Error while looking for metadata directory. {code} {code} scala> spark.version res0: String = 2.1.2 scala> spark.read.json("hdfs:///tmp/people.json").show 18/02/15 05:29:53 WARN DataSource: Error while looking for metadata directory. +----+-------+ | age| name| +----+-------+ |null|Michael| | 30| Andy| | 19| Justin| +----+-------+ {code} {code} scala> spark.version res0: String = 2.0.2 scala> spark.read.json("hdfs:///tmp/people.json").show 18/02/15 05:25:24 WARN DataSource: Error while looking for metadata directory. {code} was: When Spark reads a file path (e.g. `people.json`), it warns with a wrong error message during looking up `people.json/_spark_metadata`. The root cause of this istuation is the difference between `LocalFileSystem` and `DistributedFileSystem`. `LocalFileSystem.exists()` returns `false`, but `DistributedFileSystem.exists` raises Exception. {code} scala> spark.version res0: String = 2.4.0-SNAPSHOT scala> spark.read.json("file:///usr/hdp/current/spark-client/examples/src/main/resources/people.json").show +----+-------+ | age| name| +----+-------+ |null|Michael| | 30| Andy| | 19| Justin| +----+-------+ scala> spark.read.json("hdfs:///tmp/people.json") 18/02/15 05:00:48 WARN streaming.FileStreamSink: Error while looking for metadata directory. 18/02/15 05:00:48 WARN streaming.FileStreamSink: Error while looking for metadata directory. res6: org.apache.spark.sql.DataFrame = [age: bigint, name: string] {code} {code} scala> spark.version res0: String = 2.2.1 scala> spark.read.json("hdfs:///tmp/people.json").show 18/02/15 05:28:02 WARN FileStreamSink: Error while looking for metadata directory. 18/02/15 05:28:02 WARN FileStreamSink: Error while looking for metadata directory. {code} {code} scala> spark.read.json("hdfs:///tmp/people.json").show 18/02/15 05:29:53 WARN DataSource: Error while looking for metadata directory. +----+-------+ | age| name| +----+-------+ |null|Michael| | 30| Andy| | 19| Justin| +----+-------+ scala> spark.version res1: String = 2.1.2 {code} {code} scala> spark.version res0: String = 2.0.2 scala> spark.read.json("hdfs:///tmp/people.json").show 18/02/15 05:25:24 WARN DataSource: Error while looking for metadata directory. {code} > Spark should not warn `metadata directory` for a HDFS file path > --------------------------------------------------------------- > > Key: SPARK-23434 > URL: https://issues.apache.org/jira/browse/SPARK-23434 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 2.0.2, 2.1.2, 2.2.1, 2.3.0 > Reporter: Dongjoon Hyun > Priority: Major > > When Spark reads a file path (e.g. `people.json`), it warns with a wrong > error message during looking up `people.json/_spark_metadata`. The root cause > of this istuation is the difference between `LocalFileSystem` and > `DistributedFileSystem`. `LocalFileSystem.exists()` returns `false`, but > `DistributedFileSystem.exists` raises Exception. > {code} > scala> spark.version > res0: String = 2.4.0-SNAPSHOT > scala> > spark.read.json("file:///usr/hdp/current/spark-client/examples/src/main/resources/people.json").show > +----+-------+ > | age| name| > +----+-------+ > |null|Michael| > | 30| Andy| > | 19| Justin| > +----+-------+ > scala> spark.read.json("hdfs:///tmp/people.json") > 18/02/15 05:00:48 WARN streaming.FileStreamSink: Error while looking for > metadata directory. > 18/02/15 05:00:48 WARN streaming.FileStreamSink: Error while looking for > metadata directory. > res6: org.apache.spark.sql.DataFrame = [age: bigint, name: string] > {code} > {code} > scala> spark.version > res0: String = 2.2.1 > scala> spark.read.json("hdfs:///tmp/people.json").show > 18/02/15 05:28:02 WARN FileStreamSink: Error while looking for metadata > directory. > 18/02/15 05:28:02 WARN FileStreamSink: Error while looking for metadata > directory. > {code} > {code} > scala> spark.version > res0: String = 2.1.2 > scala> spark.read.json("hdfs:///tmp/people.json").show > 18/02/15 05:29:53 WARN DataSource: Error while looking for metadata directory. > +----+-------+ > | age| name| > +----+-------+ > |null|Michael| > | 30| Andy| > | 19| Justin| > +----+-------+ > {code} > {code} > scala> spark.version > res0: String = 2.0.2 > scala> spark.read.json("hdfs:///tmp/people.json").show > 18/02/15 05:25:24 WARN DataSource: Error while looking for metadata directory. > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org