Cleanup after unexpected exception from external delegation call

Issue: SPR-17559

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/DataSourceUtils.java

@@ -115,21 +115,28 @@ public abstract class DataSourceUtils {
 		Connection con = fetchConnection(dataSource);
 
 		if (TransactionSynchronizationManager.isSynchronizationActive()) {
-			// Use same Connection for further JDBC actions within the transaction.
-			// Thread-bound object will get removed by synchronization at transaction completion.
-			ConnectionHolder holderToUse = conHolder;
-			if (holderToUse == null) {
-				holderToUse = new ConnectionHolder(con);
-			}
-			else {
-				holderToUse.setConnection(con);
+			try {
+				// Use same Connection for further JDBC actions within the transaction.
+				// Thread-bound object will get removed by synchronization at transaction completion.
+				ConnectionHolder holderToUse = conHolder;
+				if (holderToUse == null) {
+					holderToUse = new ConnectionHolder(con);
+				}
+				else {
+					holderToUse.setConnection(con);
+				}
+				holderToUse.requested();
+				TransactionSynchronizationManager.registerSynchronization(
+						new ConnectionSynchronization(holderToUse, dataSource));
+				holderToUse.setSynchronizedWithTransaction(true);
+				if (holderToUse != conHolder) {
+					TransactionSynchronizationManager.bindResource(dataSource, holderToUse);
+				}
 			}
-			holderToUse.requested();
-			TransactionSynchronizationManager.registerSynchronization(
-					new ConnectionSynchronization(holderToUse, dataSource));
-			holderToUse.setSynchronizedWithTransaction(true);
-			if (holderToUse != conHolder) {
-				TransactionSynchronizationManager.bindResource(dataSource, holderToUse);
+			catch (RuntimeException ex) {
+				// Unexpected exception from external delegation call -> close Connection and rethrow.
+				releaseConnection(con, dataSource);
+				throw ex;
 			}
 		}
 

spring-orm/src/main/java/org/springframework/orm/jpa/EntityManagerFactoryUtils.java

@@ -266,21 +266,28 @@ public abstract class EntityManagerFactoryUtils {
 			em = (!CollectionUtils.isEmpty(properties) ? emf.createEntityManager(properties) : emf.createEntityManager());
 		}
 
-		// Use same EntityManager for further JPA operations within the transaction.
-		// Thread-bound object will get removed by synchronization at transaction completion.
-		emHolder = new EntityManagerHolder(em);
-		if (synchronizedWithTransaction) {
-			Object transactionData = prepareTransaction(em, emf);
-			TransactionSynchronizationManager.registerSynchronization(
-					new TransactionalEntityManagerSynchronization(emHolder, emf, transactionData, true));
-			emHolder.setSynchronizedWithTransaction(true);
+		try {
+			// Use same EntityManager for further JPA operations within the transaction.
+			// Thread-bound object will get removed by synchronization at transaction completion.
+			emHolder = new EntityManagerHolder(em);
+			if (synchronizedWithTransaction) {
+				Object transactionData = prepareTransaction(em, emf);
+				TransactionSynchronizationManager.registerSynchronization(
+						new TransactionalEntityManagerSynchronization(emHolder, emf, transactionData, true));
+				emHolder.setSynchronizedWithTransaction(true);
+			}
+			else {
+				// Unsynchronized - just scope it for the transaction, as demanded by the JPA 2.1 spec...
+				TransactionSynchronizationManager.registerSynchronization(
+						new TransactionScopedEntityManagerSynchronization(emHolder, emf));
+			}
+			TransactionSynchronizationManager.bindResource(emf, emHolder);
 		}
-		else {
-			// Unsynchronized - just scope it for the transaction, as demanded by the JPA 2.1 spec...
-			TransactionSynchronizationManager.registerSynchronization(
-					new TransactionScopedEntityManagerSynchronization(emHolder, emf));
+		catch (RuntimeException ex) {
+			// Unexpected exception from external delegation call -> close EntityManager and rethrow.
+			closeEntityManager(em);
+			throw ex;
 		}
-		TransactionSynchronizationManager.bindResource(emf, emHolder);
 
 		return em;
 	}