Suppress rollback attempt in case of timeout (connection closed)

Closes gh-34714

Author: jhoeller

Diff for: spring-jdbc/src/main/java/org/springframework/jdbc/datasource/LazyConnectionDataSourceProxy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2025 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.
@@ -77,6 +77,9 @@
  * You will get the same effect with non-transactional reads, but lazy fetching
  * of JDBC Connections allows you to still perform reads in transactions.
  *
+ * <p>As of 6.2.6, this DataSource proxy also suppresses a rollback attempt
+ * in case of a timeout where the connection has been closed in the meantime.
+ *
  * <p><b>NOTE:</b> This DataSource proxy needs to return wrapped Connections
  * (which implement the {@link ConnectionProxy} interface) in order to handle
  * lazy fetching of an actual JDBC Connection. Use {@link Connection#unwrap}
@@ -436,11 +439,19 @@ public Object invoke(Object proxy, Method method, Object[] args) throws Throwabl
 				return null;
 			}
 
-			// Target Connection already fetched,
-			// or target Connection necessary for current operation ->
-			// invoke method on target connection.
+
+			// Target Connection already fetched, or target Connection necessary for current operation
+			// -> invoke method on target connection.
 			try {
-				return method.invoke(getTargetConnection(method), args);
+				Connection conToUse = getTargetConnection(method);
+
+				if ("rollback".equals(method.getName()) && conToUse.isClosed()) {
+					// Connection closed in the meantime, probably due to a resource timeout. Since a
+					// rollback attempt typically happens right before close, we leniently suppress it.
+					return null;
+				}
+
+				return method.invoke(conToUse, args);
 			}
 			catch (InvocationTargetException ex) {
 				throw ex.getTargetException();