AlexYinHan commented on code in PR #26202:
URL: https://github.com/apache/flink/pull/26202#discussion_r1981370846


##########
flink-state-backends/flink-statebackend-forst/src/main/java/org/apache/flink/state/forst/ForStKeyedStateBackendBuilder.java:
##########
@@ -259,10 +259,14 @@ public ForStKeyedStateBackend<K> build() throws 
BackendBuildingException {
             defaultColumnFamilyHandle = 
restoreResult.getDefaultColumnFamilyHandle();
             nativeMetricMonitor = restoreResult.getNativeMetricMonitor();
 
-            // TODO: init materializedSstFiles and lastCompletedCheckpointId 
when implement restore
             SortedMap<Long, 
Collection<IncrementalKeyedStateHandle.HandleAndLocalPath>>
                     materializedSstFiles = new TreeMap<>();
             long lastCompletedCheckpointId = -1L;
+            if (restoreOperation instanceof ForStIncrementalRestoreOperation) {
+                backendUID = restoreResult.getBackendUID();
+                materializedSstFiles = restoreResult.getRestoredSstFiles();
+                lastCompletedCheckpointId = 
restoreResult.getLastCompletedCheckpointId();
+            }

Review Comment:
   After discussion offline, we choose to let ForSt skip inheriting files in 
NO_CLAIM mode, since there is no need to hold this action until Checkpoints and 
```notifyCheckpointComplete``` is unreliable.



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