liuliquan-marshal opened a new issue, #16350:
URL: https://github.com/apache/iceberg/issues/16350
### Apache Iceberg version
1.10.0
### Query engine
Spark
### Please describe the bug 🐞
Description
When using S3FileIO and RemoveOrphanFiles procedure with parameter
prefix_listing=true, a table whose location is a filesystem root (e.g.
s3://bucket/) causes a NullPointerException in FileSystemWalker:
`java.lang.NullPointerException
at
org.apache.iceberg.util.FileSystemWalker.isHiddenPath(FileSystemWalker.java:165)
at
org.apache.iceberg.util.FileSystemWalker.listDirRecursivelyWithFileIO(FileSystemWalker.java:75)
at
org.apache.iceberg.spark.actions.DeleteOrphanFilesSparkAction.listedFileDS(DeleteOrphanFilesSparkAction.java:316)
at
org.apache.iceberg.spark.actions.DeleteOrphanFilesSparkAction.actualFileIdentDS(DeleteOrphanFilesSparkAction.java:298)
at
org.apache.iceberg.spark.actions.DeleteOrphanFilesSparkAction.doExecute(DeleteOrphanFilesSparkAction.java:249)`
Root Cause
org.apache.hadoop.fs.Path.getParent() returns null when the path is a
filesystem root (e.g. s3://bucket/). This leads to the NPE at
FileSystemWalker.java:165:
`while (currentPath.getParent().toString().contains(baseDir)) {`
It's ok when prefix_listing=false because listDirRecursivelyWithHadoop will
be invoked rather than listDirRecursivelyWithFileIO.
### Willingness to contribute
- [x] I can contribute a fix for this bug independently
- [ ] I would be willing to contribute a fix for this bug with guidance from
the Iceberg community
- [ ] I cannot contribute a fix for this bug at this time
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