aokolnychyi commented on a change in pull request #675: Inherit snapshot ids
for manifest entries
URL: https://github.com/apache/incubator-iceberg/pull/675#discussion_r371890545
##########
File path: core/src/main/java/org/apache/iceberg/MergingSnapshotProducer.java
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@@ -381,9 +404,19 @@ private void cleanUncommittedAppends(Set<ManifestFile>
committed) {
this.cachedNewManifest = null;
}
- for (ManifestFile manifest : appendManifests) {
- if (!committed.contains(manifest)) {
- deleteFile(manifest.path());
+ // the clean-up logic depends on whether we append original manifests or
their copies
+ // 1) if we rewrite manifests before appending them
+ // we need to delete all uncommitted copies of manifests to prevent
orphan metadata files
+ // as the caller doesn't have access to them
+ // 2) if we append original manifests without rewriting them and the
commit succeeds
+ // we need to delete appended manifests that are merged with others
while preparing a new snapshot
+ // otherwise, the caller will have to find which appended manifests
were merged but not committed
+ // to prevent orphan metadata files
+ if (!snapshotIdInheritanceEnabled || !committed.isEmpty()) {
Review comment:
I've implemented an approach that is similar to the snippet above. I'll need
to do one more pass to make sure I didn't forget anything.
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