xuyangzhong commented on code in PR #26752:
URL: https://github.com/apache/flink/pull/26752#discussion_r2188899220


##########
flink-table/flink-table-runtime/src/test/java/org/apache/flink/table/runtime/operators/join/deltajoin/StreamingDeltaJoinOperatorTest.java:
##########
@@ -155,12 +157,22 @@ VarCharType.STRING_TYPE, new IntType(), new BooleanType()
 
     private RowDataHarnessAssertor assertor;
 
+    private Optional<Throwable> latestException = Optional.empty();
+
     @BeforeEach
     public void beforeEach() throws Exception {
         testHarness = createDeltaJoinOperatorTestHarness();
         testHarness.setup();
         testHarness.open();
         StreamingDeltaJoinOperator operator = unwrapOperator(testHarness);
+        // set external failure cause consumer to prevent hang
+        testHarness
+                .getEnvironment()
+                .setExternalFailureCauseConsumer(

Review Comment:
   ditto



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