(pulsar) 02/02: [fix][ml] Clarify managed cache allocator default

[lh...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

lhotari pushed a commit to branch lhotari-improve-ml-cache-adaptive
in repository https://gitbox.apache.org/repos/asf/pulsar.git

commit cd103880372c6498c5fcc19f992a5137fd874de1
Author: Lari Hotari <lh...@apache.org>
AuthorDate: Wed Sep 16 16:26:31 2026 +0300

    [fix][ml] Clarify managed cache allocator default
    
    Keep the pooled fallback explicit for the default allocator while using adaptive for ml-cache when no allocator type is configured.
    
    Assisted-by: Codex
---
 .../org/apache/pulsar/common/allocator/PulsarByteBufAllocator.java     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pulsar-common/src/main/java/org/apache/pulsar/common/allocator/PulsarByteBufAllocator.java b/pulsar-common/src/main/java/org/apache/pulsar/common/allocator/PulsarByteBufAllocator.java
index 7f6cb458ac50..ecee291778d6 100644
--- a/pulsar-common/src/main/java/org/apache/pulsar/common/allocator/PulsarByteBufAllocator.java
+++ b/pulsar-common/src/main/java/org/apache/pulsar/common/allocator/PulsarByteBufAllocator.java
@@ -143,6 +143,9 @@ public class PulsarByteBufAllocator {
         if (pooled != null) {
             return "true".equalsIgnoreCase(pooled) ? AllocatorType.POOLED : AllocatorType.UNPOOLED;
         }
+        if (DEFAULT_ALLOCATOR_NAME.equals(id)) {
+            return AllocatorType.POOLED;
+        }
         // Cache copies are commonly small, similarly sized entries. Adaptive reuses freed size-class slots
         // within smaller chunks, limiting fragmentation from entries with different cache lifetimes.
         return ML_CACHE_ALLOCATOR_NAME.equals(id) ? AllocatorType.ADAPTIVE : AllocatorType.POOLED;