diff --git a/server/src/main/java/com/linecorp/centraldogma/server/internal/api/HttpApiExceptionHandler.java b/server/src/main/java/com/linecorp/centraldogma/server/internal/api/HttpApiExceptionHandler.java
index f889ba46f7..5528e14f57 100644
--- a/server/src/main/java/com/linecorp/centraldogma/server/internal/api/HttpApiExceptionHandler.java
+++ b/server/src/main/java/com/linecorp/centraldogma/server/internal/api/HttpApiExceptionHandler.java
@@ -127,14 +127,17 @@ public HttpResponse onServiceException(ServiceRequestContext ctx, Throwable caus
         final BiFunction<ServiceRequestContext, Throwable, HttpResponse> func =
                 exceptionHandlers.get(peeledCause.getClass());
         if (func != null) {
+            ctx.setShouldReportUnloggedExceptions(false);
             return func.apply(ctx, peeledCause);
         }
 
         if (peeledCause instanceof IllegalArgumentException) {
+            ctx.setShouldReportUnloggedExceptions(false);
             return newResponse(ctx, HttpStatus.BAD_REQUEST, peeledCause);
         }
 
         if (peeledCause instanceof RequestAlreadyTimedOutException) {
+            ctx.setShouldReportUnloggedExceptions(false);
             return newResponse(ctx, HttpStatus.SERVICE_UNAVAILABLE, peeledCause);
         }