rdblue commented on a change in pull request #3104:
URL: https://github.com/apache/iceberg/pull/3104#discussion_r780846388



##########
File path: core/src/main/java/org/apache/iceberg/TableMetadata.java
##########
@@ -502,7 +519,10 @@ public TableMetadata replaceCurrentSnapshot(Snapshot 
snapshot) {
   }
 
   public TableMetadata removeSnapshotsIf(Predicate<Snapshot> removeIf) {
-    List<Snapshot> toRemove = 
snapshots.stream().filter(removeIf).collect(Collectors.toList());
+    List<Snapshot> toRemove = snapshots.stream()
+        .filter(removeIf)
+        .filter(snapshot -> !refsById.containsKey(snapshot.snapshotId()))
+        .collect(Collectors.toList());

Review comment:
       I think it is probably time to remove this method, or at least to stop 
using it. Instead, I'd probably just produce a list of snapshot IDs to remove. 
That fits better with the new builder style.




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