rdblue commented on a change in pull request #631: Add mechanism to expire old 
metadata versions
URL: https://github.com/apache/incubator-iceberg/pull/631#discussion_r346631762
 
 

 ##########
 File path: core/src/main/java/org/apache/iceberg/TableMetadata.java
 ##########
 @@ -182,7 +230,17 @@ public String toString() {
       }
       last = logEntry;
     }
-
+    this.previousMetadata = previousMetadata;
+    MetadataLogEntry previous = null;
+    for (MetadataLogEntry metadataEntry : previousMetadata) {
+      if (previous != null) {
+        Preconditions.checkArgument(
+                (metadataEntry.timestampMillis() - previous.timestampMillis()) 
>= 0,
+                "[BUG] Expected sorted previous metadata log entries.");
+      }
+      previous = metadataEntry;
+    }
+    this.removedPreviousMetadata = removedPreviousMetadata;
 
 Review comment:
   Looks like this is fixed.

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