Izeren commented on code in PR #26950:
URL: https://github.com/apache/flink/pull/26950#discussion_r2307621787


##########
flink-runtime/src/main/java/org/apache/flink/runtime/blob/BlobWriter.java:
##########
@@ -111,12 +112,29 @@ static <T> Either<SerializedValue<T>, PermanentBlobKey> 
offloadWithException(
         Preconditions.checkNotNull(serializedValue);
         Preconditions.checkNotNull(jobId);
         Preconditions.checkNotNull(blobWriter);
+        LOG.info(
+                "Offloading BLOB for job {}, size: {}",
+                jobId,
+                serializedValue.getByteArray().length);
+        final SystemClock systemClock = SystemClock.getInstance();
+        final long offloadStartTs = systemClock.relativeTimeMillis();
         try {
             final PermanentBlobKey permanentBlobKey =
                     blobWriter.putPermanent(jobId, 
serializedValue.getByteArray());
-            return Either.Right(permanentBlobKey);
+            final Either<SerializedValue<T>, PermanentBlobKey> right =
+                    Either.Right(permanentBlobKey);
+            LOG.info(
+                    "BLOB for job {} with size: {} has been offloaded in {} 
millis",
+                    jobId,
+                    serializedValue.getByteArray().length,
+                    systemClock.relativeTimeMillis() - offloadStartTs);

Review Comment:
   @1996fanrui, I have updated my PR and removed 1 log, please have a second 
look when you have time



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