amogh-jahagirdar commented on code in PR #5029:
URL: https://github.com/apache/iceberg/pull/5029#discussion_r1099722438


##########
flink/v1.16/flink/src/main/java/org/apache/iceberg/flink/source/StreamingMonitorFunction.java:
##########
@@ -124,11 +126,33 @@ public void initializeState(FunctionInitializationContext 
context) throws Except
     if (context.isRestored()) {
       LOG.info("Restoring state for the {}.", getClass().getSimpleName());
       lastSnapshotId = lastSnapshotIdState.get().iterator().next();
+    } else if (scanContext.startTag() != null) {
+      Snapshot currentSnapshot =
+          scanContext.branch() == null
+              ? table.currentSnapshot()
+              : table.snapshot(scanContext.branch());
+      Preconditions.checkNotNull(

Review Comment:
   When we read the table metadata with the current Iceberg version we will set 
the main branch. 
https://github.com/apache/iceberg/blob/master/core/src/main/java/org/apache/iceberg/TableMetadataParser.java#L444
 so it will be compatible with older version of tables.



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