apoorvmittal10 commented on code in PR #17870:
URL: https://github.com/apache/kafka/pull/17870#discussion_r1908497961


##########
core/src/main/java/kafka/server/share/DelayedShareFetch.java:
##########
@@ -207,20 +212,21 @@ LinkedHashMap<TopicIdPartition, 
FetchRequest.PartitionData> acquirablePartitions
         LinkedHashMap<TopicIdPartition, FetchRequest.PartitionData> 
topicPartitionData = new LinkedHashMap<>();
 
         sharePartitions.forEach((topicIdPartition, sharePartition) -> {
-            int partitionMaxBytes = 
shareFetch.partitionMaxBytes().getOrDefault(topicIdPartition, 0);
             // Add the share partition to the list of partitions to be fetched 
only if we can
             // acquire the fetch lock on it.
             if (sharePartition.maybeAcquireFetchLock()) {
                 try {
                     // If the share partition is already at capacity, we 
should not attempt to fetch.
                     if (sharePartition.canAcquireRecords()) {
+                        // We do not know the total partitions that can be 
acquired at this stage, hence we set maxBytes
+                        // to 0 for now and will update it before doing the 
replica manager fetch.
                         topicPartitionData.put(
                             topicIdPartition,
                             new FetchRequest.PartitionData(
                                 topicIdPartition.topicId(),
                                 sharePartition.nextFetchOffset(),
                                 0,
-                                partitionMaxBytes,
+                                0,

Review Comment:
   I was thinking some other default value like 1MB but if you delay the 
creation of FetchRequest.PartitionData to the time when maxBytes is known then 
anyways it ll not be required.



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