diff --git a/src/Storages/ObjectStorageQueue/ObjectStorageQueueMetadata.cpp b/src/Storages/ObjectStorageQueue/ObjectStorageQueueMetadata.cpp
index e424769b061..2da4aa6b665 100644
--- a/src/Storages/ObjectStorageQueue/ObjectStorageQueueMetadata.cpp
+++ b/src/Storages/ObjectStorageQueue/ObjectStorageQueueMetadata.cpp
@@ -239,6 +239,8 @@ void ObjectStorageQueueMetadata::syncWithKeeper(
             const auto metadata_str = zookeeper->get(fs::path(zookeeper_path) / "metadata");
             const auto metadata_from_zk = ObjectStorageQueueTableMetadata::parse(metadata_str);
 
+            LOG_TRACE(log, "Metadata in keeper: {}", metadata_str);
+
             table_metadata.checkEquals(metadata_from_zk);
             return;
         }
diff --git a/src/Storages/ObjectStorageQueue/ObjectStorageQueueTableMetadata.cpp b/src/Storages/ObjectStorageQueue/ObjectStorageQueueTableMetadata.cpp
index c2f70e3e804..926d5aacda4 100644
--- a/src/Storages/ObjectStorageQueue/ObjectStorageQueueTableMetadata.cpp
+++ b/src/Storages/ObjectStorageQueue/ObjectStorageQueueTableMetadata.cpp
@@ -88,7 +88,7 @@ ObjectStorageQueueTableMetadata::ObjectStorageQueueTableMetadata(const Poco::JSO
     , tracked_files_limit(getOrDefault(json, "tracked_files_limit", "s3queue_", 0))
     , tracked_file_ttl_sec(getOrDefault(json, "tracked_files_ttl_sec", "s3queue_", 0))
     , buckets(getOrDefault(json, "buckets", "", 0))
-    , processing_threads_num(getOrDefault(json, "processing_threads_num", "s3queue_", 0))
+    , processing_threads_num(getOrDefault(json, "processing_threads_num", "s3queue_", 1))
     , last_processed_path(getOrDefault<String>(json, "last_processed_file", "s3queue_", ""))
 {
 }