[SPARK-23434][SQL][BRANCH-2.3] Spark should not warn metadata directory for a HDFS file path
#20713
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…DFS file path
## What changes were proposed in this pull request?
In a kerberized cluster, when Spark reads a file path (e.g. `people.json`), it warns with a wrong warning message during looking up `people.json/_spark_metadata`. The root cause of this situation is the difference between `LocalFileSystem` and `DistributedFileSystem`. `LocalFileSystem.exists()` returns `false`, but `DistributedFileSystem.exists` raises `org.apache.hadoop.security.AccessControlException`.
```scala
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.
```
After this PR,
```scala
scala> spark.read.json("hdfs:///tmp/people.json").show
+----+-------+
| age| name|
+----+-------+
|null|Michael|
| 30| Andy|
| 19| Justin|
+----+-------+
```
## How was this patch tested?
Manual.
Author: Dongjoon Hyun <[email protected]>
Closes #20616 from dongjoon-hyun/SPARK-23434.
|
Test build #87872 has finished for PR 20713 at commit
|
Member
Author
|
Retest this please. |
|
Test build #87875 has finished for PR 20713 at commit
|
Member
Author
|
@cloud-fan and @zsxwing . |
Member
Author
|
Retest this please. |
|
Test build #87966 has finished for PR 20713 at commit
|
asfgit
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Mar 5, 2018
…ory` for a HDFS file path
## What changes were proposed in this pull request?
In a kerberized cluster, when Spark reads a file path (e.g. `people.json`), it warns with a wrong warning message during looking up `people.json/_spark_metadata`. The root cause of this situation is the difference between `LocalFileSystem` and `DistributedFileSystem`. `LocalFileSystem.exists()` returns `false`, but `DistributedFileSystem.exists` raises `org.apache.hadoop.security.AccessControlException`.
```scala
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.
```
After this PR,
```scala
scala> spark.read.json("hdfs:///tmp/people.json").show
+----+-------+
| age| name|
+----+-------+
|null|Michael|
| 30| Andy|
| 19| Justin|
+----+-------+
```
## How was this patch tested?
Manual.
Author: Dongjoon Hyun <[email protected]>
Closes #20713 from dongjoon-hyun/SPARK-23434-2.3.
Contributor
|
thanks, merging to 2.3! |
Member
Author
|
Thank you! |
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What changes were proposed in this pull request?
In a kerberized cluster, when Spark reads a file path (e.g.
people.json), it warns with a wrong warning message during looking uppeople.json/_spark_metadata. The root cause of this situation is the difference betweenLocalFileSystemandDistributedFileSystem.LocalFileSystem.exists()returnsfalse, butDistributedFileSystem.existsraisesorg.apache.hadoop.security.AccessControlException.After this PR,
How was this patch tested?
Manual.