kamalcph commented on code in PR #17492:
URL: https://github.com/apache/kafka/pull/17492#discussion_r1800542225


##########
storage/src/main/java/org/apache/kafka/server/log/remote/metadata/storage/TopicBasedRemoteLogMetadataManager.java:
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@@ -391,6 +391,8 @@ private void initializeResources() {
         boolean topicCreated = false;
         long startTimeMs = time.milliseconds();
         Admin adminClient = null;
+
+        lock.writeLock().lock();

Review Comment:
   IIRC, the reason for not taking `writeLock` before the instantiation of the 
Admin client is that the topic exists/creation operation is costly when the 
controller queue becomes busy. If we take a lock, then the callers of the RLMM 
might be waiting for this operation to complete.



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