felixYyu opened a new issue #4368:
URL: https://github.com/apache/iceberg/issues/4368
in BaseDeleteOrphanFilesSparkAction to
buildValidMetadataFileDF->BaseSparkAction.buildOtherMetadataFileDF->ReachableFileUtil.metadataFileLocations,
the first existent previous metadata need FIFO or LIFO?
```
public static Set<String> metadataFileLocations(Table table, boolean
recursive) {
Set<String> metadataFileLocations = Sets.newHashSet();
TableOperations ops = ((HasTableOperations) table).operations();
TableMetadata tableMetadata = ops.current();
metadataFileLocations.add(tableMetadata.metadataFileLocation());
metadataFileLocations(tableMetadata, metadataFileLocations, ops.io(),
recursive);
return metadataFileLocations;
}
private static void metadataFileLocations(TableMetadata metadata,
Set<String> metadataFileLocations,
FileIO io, boolean recursive) {
List<MetadataLogEntry> metadataLogEntries = metadata.previousFiles();
if (metadataLogEntries.size() > 0) {
for (MetadataLogEntry metadataLogEntry : metadataLogEntries) {
metadataFileLocations.add(metadataLogEntry.file());
}
if (recursive) {
TableMetadata previousMetadata =
findFirstExistentPreviousMetadata(metadataLogEntries, io);
if (previousMetadata != null) {
metadataFileLocations(previousMetadata, metadataFileLocations, io,
recursive);
}
}
}
}
private static TableMetadata
findFirstExistentPreviousMetadata(List<MetadataLogEntry> metadataLogEntries,
FileIO io) {
TableMetadata metadata = null;
for (MetadataLogEntry metadataLogEntry : metadataLogEntries) {
try {
metadata = TableMetadataParser.read(io, metadataLogEntry.file());
break;
} catch (Exception e) {
LOG.error("Failed to load {}", metadataLogEntry, e);
}
}
return metadata;
}
```
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