amogh-jahagirdar commented on a change in pull request #4052:
URL: https://github.com/apache/iceberg/pull/4052#discussion_r814044074
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File path: aws/src/main/java/org/apache/iceberg/aws/s3/S3FileIO.java
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@@ -100,6 +115,67 @@ public void deleteFile(String path) {
client().deleteObject(deleteRequest);
}
+ /**
+ * Deletes the given paths in a batched manner.
+ * <p>
+ * The paths are grouped by bucket, and deletion is triggered when we either
reach the configured batch size
+ * or have a final remainder batch for each bucket.
+ *
+ * @param paths paths to delete
+ */
+ @Override
+ public void deleteFiles(Iterable<String> paths) {
+ SetMultimap<String, String> bucketToObjects =
Multimaps.newSetMultimap(Maps.newHashMap(), Sets::newHashSet);
+ List<String> failedDeletions = Lists.newArrayList();
+ for (String path : paths) {
+ S3URI location = new S3URI(path);
+ String bucket = location.bucket();
+ String objectKey = location.key();
+ Set<String> objectsInBucket = bucketToObjects.get(bucket);
+ if (objectsInBucket.size() == awsProperties.s3FileIoDeleteBatchSize()) {
+ List<String> failedDeletionsForBatch = deleteObjectsInBucket(bucket,
objectsInBucket);
+ failedDeletions.addAll(failedDeletionsForBatch);
+ bucketToObjects.removeAll(bucket);
+ }
+ bucketToObjects.get(bucket).add(objectKey);
+ }
+
+ // Delete the remainder
+ List<List<String>> remainderFailedObjects = bucketToObjects
+ .asMap()
+ .entrySet()
+ .stream()
+ .map(entry -> deleteObjectsInBucket(entry.getKey(), entry.getValue()))
+ .collect(Collectors.toList());
+
+ remainderFailedObjects.forEach(failedDeletions::addAll);
+ if (!failedDeletions.isEmpty()) {
+ throw new FileIODeletionException(failedDeletions);
+ }
+
+ }
+
+ private List<String> deleteObjectsInBucket(String bucket, Collection<String>
objects) {
+ if (!objects.isEmpty()) {
+ List<ObjectIdentifier> objectIds = objects
+ .stream()
+ .map(objectKey -> ObjectIdentifier.builder().key(objectKey).build())
+ .collect(Collectors.toList());
+ DeleteObjectsRequest deleteObjectsRequest =
DeleteObjectsRequest.builder()
+ .bucket(bucket)
+ .delete(Delete.builder().objects(objectIds).build())
+ .build();
+ DeleteObjectsResponse response =
client().deleteObjects(deleteObjectsRequest);
+ if (response.hasErrors()) {
+ return response.errors()
+ .stream()
+ .map(S3Error::key)
Review comment:
Ah yeah that's true. One thing to note though is the exception that gets
surfaced to users in case of bulk deletion failure just has the number of
failures rather than the full list of paths, as it can be quite noisy in user's
logs.
I do still think we should construct the full S3 paths in case someone wants
to use that. do you think the S3 BatchDeletion exception message should list
out the first 10 (or some other small number) of paths which failed?
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