vongosling commented on a change in pull request #358: [ISSUE #292] Add support 
of transactional message feature 
URL: https://github.com/apache/rocketmq/pull/358#discussion_r201624444
 
 

 ##########
 File path: 
broker/src/main/java/org/apache/rocketmq/broker/client/net/Broker2Client.java
 ##########
 @@ -62,34 +60,22 @@ public Broker2Client(BrokerController brokerController) {
     }
 
     public void checkProducerTransactionState(
+        final String group,
         final Channel channel,
         final CheckTransactionStateRequestHeader requestHeader,
-        final SelectMappedBufferResult selectMappedBufferResult) {
+        final MessageExt messageExt) throws Exception {
         RemotingCommand request =
             
RemotingCommand.createRequestCommand(RequestCode.CHECK_TRANSACTION_STATE, 
requestHeader);
-        request.markOnewayRPC();
-
+        request.setBody(MessageDecoder.encode(messageExt, false));
         try {
-            FileRegion fileRegion =
-                new 
OneMessageTransfer(request.encodeHeader(selectMappedBufferResult.getSize()),
-                    selectMappedBufferResult);
-            channel.writeAndFlush(fileRegion).addListener(new 
ChannelFutureListener() {
-                @Override
-                public void operationComplete(ChannelFuture future) throws 
Exception {
-                    selectMappedBufferResult.release();
-                    if (!future.isSuccess()) {
-                        log.error("invokeProducer failed,", future.cause());
-                    }
-                }
-            });
-        } catch (Throwable e) {
-            log.error("invokeProducer exception", e);
-            selectMappedBufferResult.release();
+            this.brokerController.getRemotingServer().invokeOneway(channel, 
request, 10);
 
 Review comment:
   10 ?

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