zhztheplayer commented on code in PR #11493:
URL: 
https://github.com/apache/incubator-gluten/pull/11493#discussion_r2737247735


##########
cpp/velox/memory/VeloxMemoryManager.cc:
##########
@@ -327,22 +330,17 @@ int64_t 
shrinkVeloxMemoryPool(velox::memory::MemoryManager* mm, velox::memory::M
 std::shared_ptr<arrow::MemoryPool> 
VeloxMemoryManager::getOrCreateArrowMemoryPool(const std::string& name) {
   std::lock_guard<std::mutex> l(mutex_);
   if (const auto it = arrowPools_.find(name); it != arrowPools_.end()) {
-    auto pool = it->second.lock();
-    VELOX_CHECK_NOT_NULL(pool, "Arrow memory pool {} has been destructed", 
name);
-    return pool;
+    if (auto pool = it->second.lock()) {
+      return pool;
+    }
+    arrowPools_.erase(name);
   }
-  auto pool = std::make_shared<ArrowMemoryPool>(
-      blockListener_.get(), [this, name](arrow::MemoryPool* pool) { 
this->dropMemoryPool(name); });
+
+  auto pool = std::make_shared<ArrowMemoryPool>(blockListener_.get());

Review Comment:
   Because in the latest PR's code, the expired map entries won't get removed 
from map until being replaced by new value of the same key. Is this an 
intentional change?



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