[GitHub] [pulsar] BewareMyPower commented on a change in pull request #9853: Fix schema not added when subscribe an empty topic without schema

[GitBox <gi...@apache.org>]

BewareMyPower commented on a change in pull request #9853:
URL: https://github.com/apache/pulsar/pull/9853#discussion_r591170704



##########
File path: pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentTopic.java
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@@ -2510,8 +2510,13 @@ private int getMessageTTL() throws Exception {
     public CompletableFuture<Void> addSchemaIfIdleOrCheckCompatible(SchemaData schema) {
         return hasSchema()
             .thenCompose((hasSchema) -> {
-                if (hasSchema || isActive(InactiveTopicDeleteMode.delete_when_no_subscriptions)
-                        || ledger.getTotalSize() != 0) {
+                int numActiveConsumers = subscriptions.values().stream()
+                        .map(subscription -> subscription.getConsumers().size())
+                        .reduce(0, Integer::sum);

Review comment:
       If you mean the `numActiveConsumers`, yes.




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