Raise beforeCompletion/afterCompletion exception log level to error

Closes gh-30776

(cherry picked from commit f1567fb)

Author: jhoeller

spring-tx/src/main/java/org/springframework/transaction/reactive/TransactionSynchronizationUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -85,7 +85,7 @@ public static Mono<Void> triggerBeforeCommit(Collection<TransactionSynchronizati
 	public static Mono<Void> triggerBeforeCompletion(Collection<TransactionSynchronization> synchronizations) {
 		return Flux.fromIterable(synchronizations)
 				.concatMap(TransactionSynchronization::beforeCompletion).onErrorContinue((t, o) ->
-						logger.debug("TransactionSynchronization.beforeCompletion threw exception", t)).then();
+						logger.error("TransactionSynchronization.beforeCompletion threw exception", t)).then();
 	}
 
 	/**
@@ -115,7 +115,7 @@ public static Mono<Void> invokeAfterCompletion(
 			Collection<TransactionSynchronization> synchronizations, int completionStatus) {
 
 		return Flux.fromIterable(synchronizations).concatMap(it -> it.afterCompletion(completionStatus))
-				.onErrorContinue((t, o) -> logger.debug("TransactionSynchronization.afterCompletion threw exception", t)).then();
+				.onErrorContinue((t, o) -> logger.error("TransactionSynchronization.afterCompletion threw exception", t)).then();
 	}
 
 

spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -108,7 +108,7 @@ public static void triggerBeforeCompletion() {
 				synchronization.beforeCompletion();
 			}
 			catch (Throwable ex) {
-				logger.debug("TransactionSynchronization.beforeCompletion threw exception", ex);
+				logger.error("TransactionSynchronization.beforeCompletion threw exception", ex);
 			}
 		}
 	}
@@ -172,7 +172,7 @@ public static void invokeAfterCompletion(@Nullable List<TransactionSynchronizati
 					synchronization.afterCompletion(completionStatus);
 				}
 				catch (Throwable ex) {
-					logger.debug("TransactionSynchronization.afterCompletion threw exception", ex);
+					logger.error("TransactionSynchronization.afterCompletion threw exception", ex);
 				}
 			}
 		}