fix

fe/fe-core/src/main/java/org/apache/doris/qe/runtime/ThriftPlansBuilder.java

@@ -240,14 +240,19 @@ private static Map<Integer, Integer> computeExchangeSenderNum(PipelineDistribute
         return senderNum;
     }
 
-    private static void setMultiCastDestinationThrift(PipelineDistributedPlan fragmentPlan) {
+    private static void setMultiCastDestinationThriftIfNotSet(PipelineDistributedPlan fragmentPlan) {
         MultiCastDataSink multiCastDataSink = (MultiCastDataSink) fragmentPlan.getFragmentJob().getFragment().getSink();
         List<List<TPlanFragmentDestination>> destinationList = multiCastDataSink.getDestinations();
 
         List<DataStreamSink> dataStreamSinks = multiCastDataSink.getDataStreamSinks();
         for (int i = 0; i < dataStreamSinks.size(); i++) {
-            DataStreamSink realSink = dataStreamSinks.get(i);
             List<TPlanFragmentDestination> destinations = destinationList.get(i);
+            if (!destinations.isEmpty()) {
+                // we should only set destination only once,
+                // because all backends share the same MultiCastDataSink object
+                continue;
+            }
+            DataStreamSink realSink = dataStreamSinks.get(i);
             for (Entry<DataSink, List<AssignedJob>> kv : fragmentPlan.getDestinations().entrySet()) {
                 DataSink sink = kv.getKey();
                 if (sink == realSink) {
@@ -318,7 +323,7 @@ private static TPipelineFragmentParams fragmentToThriftIfAbsent(
             List<TPlanFragmentDestination> nonMultiCastDestinations;
             if (fragment.getSink() instanceof MultiCastDataSink) {
                 nonMultiCastDestinations = Lists.newArrayList();
-                setMultiCastDestinationThrift(fragmentPlan);
+                setMultiCastDestinationThriftIfNotSet(fragmentPlan);
             } else {
                 nonMultiCastDestinations = nonMultiCastDestinationToThrift(fragmentPlan);
             }

regression-test/suites/nereids_syntax_p0/distribute/test_multicast_sink.groovy

@@ -0,0 +1,60 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+suite("test_multicast_sink") {
+    multi_sql """
+            drop table if exists table_1_undef_partitions2_keys3_properties4_distributed_by5;
+            CREATE TABLE `table_1_undef_partitions2_keys3_properties4_distributed_by5` (
+              `col_int_undef_signed` int NULL,
+              `col_int_undef_signed_not_null` int NOT NULL,
+              `col_date_undef_signed` date NULL,
+              `col_date_undef_signed_not_null` date NOT NULL,
+              `col_varchar_10__undef_signed` varchar(10) NULL,
+              `col_varchar_10__undef_signed_not_null` varchar(10) NOT NULL,
+              `col_varchar_1024__undef_signed` varchar(1024) NULL,
+              `col_varchar_1024__undef_signed_not_null` varchar(1024) NOT NULL,
+              `pk` int NULL
+            ) ENGINE=OLAP
+            DUPLICATE KEY(`col_int_undef_signed`, `col_int_undef_signed_not_null`, `col_date_undef_signed`)
+            DISTRIBUTED BY HASH(`pk`) BUCKETS 10
+            PROPERTIES (
+            "replication_allocation" = "tag.location.default: 1"
+            );
+            insert into table_1_undef_partitions2_keys3_properties4_distributed_by5 values(3, 6, '2023-12-17', '2023-12-17', 'ok', 'v', 'want', 'z', 0);
+            set enable_nereids_distribute_planner=true;
+            set parallel_pipeline_task_num = 1;
+            """
+
+    for (def i in 0..<100) {
+        test {
+            sql """
+            WITH cte1 AS(
+                SELECT t1.`pk`
+                FROM table_1_undef_partitions2_keys3_properties4_distributed_by5 AS t1
+                ORDER BY t1.pk
+            )
+            SELECT cte1.`pk` AS pk1
+            FROM cte1
+            LEFT OUTER JOIN cte1 AS alias1
+            ON cte1 . `pk` = alias1 . `pk`
+            WHERE cte1.`pk` < 3
+            LIMIT 66666666
+            """
+            result([[0]])
+        }
+    }
+}