jolshan commented on code in PR #15964:
URL: https://github.com/apache/kafka/pull/15964#discussion_r1603797394


##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/runtime/CoordinatorRuntime.java:
##########
@@ -723,30 +757,66 @@ public void run() {
                         // If the records are not empty, first, they are 
applied to the state machine,
                         // second, then are written to the partition/log, and 
finally, the response
                         // is put into the deferred event queue.
+                        long prevLastWrittenOffset = 
context.coordinator.lastWrittenOffset();
+                        LogConfig logConfig = partitionWriter.config(tp);
+                        byte magic = logConfig.recordVersion().value;
+                        int maxBatchSize = logConfig.maxMessageSize();
+                        long currentTimeMs = time.milliseconds();
+                        ByteBuffer buffer = 
context.bufferSupplier.get(Math.min(16384, maxBatchSize));

Review Comment:
   Nice we got rid of the thread local. 👍 



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