fix bug when cache_size=0

deploy/asapo_services/asap3.tfvars

@@ -21,7 +21,8 @@ receiver_dataserver_cache_size = 30 #gb
 receiver_receive_to_disk_threshold = 50 # mb
 receiver_dataserver_nthreads = 8
 receiver_network_modes = "tcp"
-receiver_kafka_enabled = true
+receiver_kafka_enabled = false
+receiver_kafka_metadata_broker_list = ""
 
 grafana_total_memory_size = 2000
 influxdb_total_memory_size = 2000

deploy/asapo_services/scripts/asapo.auto.tfvars.in

@@ -68,4 +68,7 @@ alertmanager_port = 9093
 
 n_receivers = 1
 n_brokers = 1
-n_fts = 1
\ No newline at end of file
+n_fts = 1
+
+receiver_kafka_enabled = false
+receiver_kafka_metadata_broker_list = ""

receiver/src/request.cpp

@@ -50,6 +50,7 @@ Error Request::PrepareDataBufferAndLockIfNeeded() {
     auto err = PrepareDataBufferFromCache();
     if (err) {
         log__->Warning(LogMessageWithFields(err).Append(RequestLog("", this)));
+        cache__ = nullptr;
         return PrepareDataBufferFromMemory();
     }
     return nullptr;