Attempt to close all delegate writers even when some fail

Issue #4750

Signed-off-by: Elimelec Burghelea <elimelec1@protonmail.com>

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/support/CompositeItemWriter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2023 the original author or authors.
+ * Copyright 2006-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@ import org.springframework.batch.item.ItemWriter;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.util.Assert;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -37,6 +38,7 @@ import java.util.List;
  * @author Robert Kasanicky
  * @author Dave Syer
  * @author Mahmoud Ben Hassine
+ * @author Elimelec Burghelea
  */
 public class CompositeItemWriter<T> implements ItemStreamWriter<T>, InitializingBean {
 
@@ -105,11 +107,25 @@ public class CompositeItemWriter<T> implements ItemStreamWriter<T>, Initializing
 
 	@Override
 	public void close() throws ItemStreamException {
+		List<Exception> exceptions = new ArrayList<>();
+
 		for (ItemWriter<? super T> writer : delegates) {
 			if (!ignoreItemStream && (writer instanceof ItemStream)) {
-				((ItemStream) writer).close();
+				try {
+					((ItemStream) writer).close();
+				}
+				catch (Exception e) {
+					exceptions.add(e);
+				}
 			}
 		}
+
+		if (!exceptions.isEmpty()) {
+			String message = String.format("Failed to close %d delegate(s) due to exceptions", exceptions.size());
+			ItemStreamException holder = new ItemStreamException(message);
+			exceptions.forEach(holder::addSuppressed);
+			throw holder;
+		}
 	}
 
 	@Override

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/support/CompositeItemWriterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008-2022 the original author or authors.
+ * Copyright 2008-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,14 +18,18 @@ package org.springframework.batch.item.support;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.batch.item.Chunk;
 import org.springframework.batch.item.ExecutionContext;
+import org.springframework.batch.item.ItemStreamException;
 import org.springframework.batch.item.ItemStreamWriter;
 import org.springframework.batch.item.ItemWriter;
 
+import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
 
 /**
  * Tests for {@link CompositeItemWriter}
@@ -33,6 +37,7 @@ import static org.mockito.Mockito.mock;
  * @author Robert Kasanicky
  * @author Will Schipp
  * @author Mahmoud Ben Hassine
+ * @author Elimelec Burghelea
  */
 class CompositeItemWriterTests {
 
@@ -94,4 +99,36 @@ class CompositeItemWriterTests {
 		itemWriter.write(data);
 	}
 
+	@Test
+	void testCloseWithMultipleDelegate() {
+		AbstractFileItemWriter<String> delegate1 = mock();
+		AbstractFileItemWriter<String> delegate2 = mock();
+		CompositeItemWriter<String> itemWriter = new CompositeItemWriter<>(List.of(delegate1, delegate2));
+
+		itemWriter.close();
+
+		verify(delegate1).close();
+		verify(delegate2).close();
+	}
+
+	@Test
+	void testCloseWithMultipleDelegatesThatThrow() {
+		AbstractFileItemWriter<String> delegate1 = mock();
+		AbstractFileItemWriter<String> delegate2 = mock();
+		CompositeItemWriter<String> itemWriter = new CompositeItemWriter<>(List.of(delegate1, delegate2));
+
+		doThrow(new ItemStreamException("A failure")).when(delegate1).close();
+
+		try {
+			itemWriter.close();
+			Assertions.fail("Expected an ItemStreamException");
+		}
+		catch (ItemStreamException ignored) {
+
+		}
+
+		verify(delegate1).close();
+		verify(delegate2).close();
+	}
+
 }