Fixed thread safety issue about KafkaOptions. #89

src/DotNetCore.CAP.Kafka/KafkaConsumerClient.cs

@@ -66,16 +66,18 @@ namespace DotNetCore.CAP.Kafka
 
         private void InitKafkaClient()
         {
-            _kafkaOptions.MainConfig["group.id"] = _groupId;
+            lock (_kafkaOptions)
+            {
+                _kafkaOptions.MainConfig["group.id"] = _groupId;
 
-            var config = _kafkaOptions.AsKafkaConfig();
-            _consumerClient = new Consumer<Null, string>(config, null, StringDeserializer);
-            _consumerClient.OnConsumeError += ConsumerClient_OnConsumeError;
-            _consumerClient.OnMessage += ConsumerClient_OnMessage;
-            _consumerClient.OnError += ConsumerClient_OnError;
+                var config = _kafkaOptions.AsKafkaConfig();
+                _consumerClient = new Consumer<Null, string>(config, null, StringDeserializer);
+                _consumerClient.OnConsumeError += ConsumerClient_OnConsumeError;
+                _consumerClient.OnMessage += ConsumerClient_OnMessage;
+                _consumerClient.OnError += ConsumerClient_OnError;
+            }
         }
 
-
         private void ConsumerClient_OnConsumeError(object sender, Message e)
         {
             var message = e.Deserialize<Null, string>(null, StringDeserializer);