uncleGen opened a new pull request #28737:
URL: https://github.com/apache/spark/pull/28737
### What changes were proposed in this pull request?
Resolve the recursive calls in `FileScanRDD`.
### Why are the changes needed?
Reading from `FileScanRDD` may failed with a `StackOverflowError` in my
environment:
- There are a mass of empty files in table partition.
- Set `spark.sql.files.maxPartitionBytes` with a large value: 1024MB.
```
java.lang.StackOverflowError
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.getSubject(Subject.java:297)
at
org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:648)
at
org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2828)
at
org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2818)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2684)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:373)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295)
at
org.apache.parquet.hadoop.util.HadoopInputFile.fromPath(HadoopInputFile.java:38)
at
org.apache.parquet.hadoop.ParquetFileReader.<init>(ParquetFileReader.java:640)
at
org.apache.spark.sql.execution.datasources.parquet.SpecificParquetRecordReaderBase.initialize(SpecificParquetRecordReaderBase.java:148)
at
org.apache.spark.sql.execution.datasources.parquet.VectorizedParquetRecordReader.initialize(VectorizedParquetRecordReader.java:143)
at
org.apache.spark.sql.execution.datasources.parquet.ParquetFileFormat.$anonfun$buildReaderWithPartitionValues$2(ParquetFileFormat.scala:326)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.org$apache$spark$sql$execution$datasources$FileScanRDD$$anon$$readCurrentFile(FileScanRDD.scala:116)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:169)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:93)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:173)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:93)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:173)
```
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Add new UT.
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