zhuanshenbsj1 commented on code in PR #8394:
URL: https://github.com/apache/hudi/pull/8394#discussion_r1168119639


##########
hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/sink/clustering/HoodieFlinkClusteringJob.java:
##########
@@ -358,6 +358,9 @@ private void cluster() throws Exception {
           .setParallelism(1);
 
       env.execute("flink_hudi_clustering_" + clusteringInstant.getTimestamp());
+      if (conf.getBoolean(FlinkOptions.CLEAN_ASYNC_ENABLED) && 
conf.getBoolean(FlinkOptions.CLEAN_OFFLINE_ENABLE)){
+        writeClient.clean();
+      }

Review Comment:
   CleanFunction#open only do clean when 
OptionsResolver.isInsertOverwrite(conf) is true.
   
   ```
     @Override
     public void open(Configuration parameters) throws Exception {
       super.open(parameters);
       if (conf.getBoolean(FlinkOptions.CLEAN_ASYNC_ENABLED)) {
         this.writeClient = FlinkWriteClients.createWriteClient(conf, 
getRuntimeContext());
         this.executor = 
NonThrownExecutor.builder(LOG).waitForTasksFinish(true).build();
   
         if (OptionsResolver.isInsertOverwrite(conf)) {
           String instantTime = HoodieActiveTimeline.createNewInstantTime();
           LOG.info(String.format("exec sync clean with instant time %s...", 
instantTime));
           executor.execute(() -> writeClient.clean(instantTime), "wait for 
sync cleaning finish");
         }
       }
     }
   ```



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