HHH-18491 Do no try to resume non-existant transaction in doInSuspendedTransaction.

Author: Siggen

hibernate-core/src/main/java/org/hibernate/resource/transaction/backend/jta/internal/JtaIsolationDelegate.java

@@ -114,7 +114,9 @@ private <T> T doInSuspendedTransaction(HibernateCallable<T> callable) {
 		try {
 			// First we suspend any current JTA transaction
 			final Transaction surroundingTransaction = transactionManager.suspend();
-			LOG.debugf( "Surrounding JTA transaction suspended [%s]", surroundingTransaction );
+			if ( surroundingTransaction != null ) {
+				LOG.debugf( "Surrounding JTA transaction suspended [%s]", surroundingTransaction );
+			}
 
 			try {
 				return callable.call();
@@ -124,8 +126,10 @@ private <T> T doInSuspendedTransaction(HibernateCallable<T> callable) {
 			}
 			finally {
 				try {
-					transactionManager.resume( surroundingTransaction );
-					LOG.debugf( "Surrounding JTA transaction resumed [%s]", surroundingTransaction );
+					if ( surroundingTransaction != null ) {
+						transactionManager.resume( surroundingTransaction );
+						LOG.debugf( "Surrounding JTA transaction resumed [%s]", surroundingTransaction );
+					}
 				}
 				catch ( Throwable t2 ) {
 					// if the actually work had an error use that, otherwise error based on t