diff --git a/judgels-backends/judgels-server-app/src/main/java/judgels/sandalphon/submission/programming/GradingResponseProcessor.java b/judgels-backends/judgels-server-app/src/main/java/judgels/sandalphon/submission/programming/GradingResponseProcessor.java
index ffb54f5be..993bcefbb 100644
--- a/judgels-backends/judgels-server-app/src/main/java/judgels/sandalphon/submission/programming/GradingResponseProcessor.java
+++ b/judgels-backends/judgels-server-app/src/main/java/judgels/sandalphon/submission/programming/GradingResponseProcessor.java
@@ -56,6 +56,8 @@ public void process(Message message) {
                 submissionConsumer.accept(submission.get());
                 messageClient.confirmMessage(message.getId());
                 break;
+            } else {
+                LOGGER.warn("Was not able to find grading jid {}", response.getGradingJid());
             }
 
             try {