【发布时间】：2018-07-10 08:47:16
【问题描述】：
我们正在使用 XMS.Net 连接到 WebSphere MQ 服务器 V7；这在 V6 服务器上一直运行良好，但自从“对方”升级到 V7 后，我们遇到了一些麻烦。大部分都已修复，但现在我偶然发现了一个我无法解释的错误，也找不到任何关于：
CWSMQ0282E: A null value has been used for argument BUFFER = <> NULL within method ImportMQMDMesageBuffer(WmqSession, WmqDestination, MQMD,byte[],int,int).
The preceding method detected an invalid null argument.
If necessary, recode the application to avoid the error condition.
Stacktrace: at IBM.XMS.Client.WMQ.WmqReceiveMarshal.ImportMQMDMesageBuffer(MQMessageDescriptor mqmd, Byte[] buffer, Int32 dataStart, Int32 dataEnd)
at IBM.XMS.Client.WMQ.WmqAsyncConsumerShadow.Consumer(Phconn hconn, MQMessageDescriptor mqmd, MQGetMessageOptions mqgmo, Byte[] pBuffer, MQCBC mqcbc)
at IBM.WMQ.Nmqi.UnmanagedNmqiMQ.NmqiConsumerMethodUM(Int32 hconn, IntPtr structMqmd, IntPtr structMqgmo, IntPtr buffer, IntPtr structMqcbc)
我唯一认为我知道这个错误的原因是我们发送了一条消息，我期待 CoA 和 CoD 消息；我希望这些都在队列中，当我关闭我的消费者侦听这些消息时，其余的工作正常。
我完全不知道发生了什么......
编辑
这是最小的测试用例：
using System;
using System.Configuration;
using System.Text;
using IBM.XMS;
namespace TestApp
{
class Program
{
static void Main(string[] args)
{
//Setup unhandled exception "logging"
AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
//Change this to your own needs!
string QueueManager = "CONTOSO";
string Channel = "MYCOMPANY.CONTOSO.TCP";
string Queue = "MYCOMPANY.REPORTQ";
string HostIP = "192.168.1.29"
int Port = 1416;
//Create connection
var factoryfactory = XMSFactoryFactory.GetInstance(XMSC.CT_WMQ);
var connectionfactory = factoryfactory.CreateConnectionFactory();
connectionfactory.SetStringProperty(XMSC.WMQ_QUEUE_MANAGER, QueueManager);
connectionfactory.SetStringProperty(XMSC.WMQ_HOST_NAME, HostIP);
connectionfactory.SetIntProperty(XMSC.WMQ_PORT, Port);
connectionfactory.SetStringProperty(XMSC.WMQ_CHANNEL, Channel);
connectionfactory.SetIntProperty(XMSC.WMQ_BROKER_VERSION, XMSC.WMQ_BROKER_V2);
connectionfactory.SetIntProperty(XMSC.WMQ_CONNECTION_MODE, XMSC.WMQ_CM_CLIENT_UNMANAGED);
var connection = connectionfactory.CreateConnection();
connection.ExceptionListener = new ExceptionListener(OnXMSExceptionReceived);
//Create session
var session = connection.CreateSession(false, AcknowledgeMode.ClientAcknowledge);
//Create consumer
var queue = session.CreateQueue(string.Format("queue://{0}/{1}", QueueManager, Queue));
queue.SetIntProperty(XMSC.WMQ_TARGET_CLIENT, XMSC.WMQ_TARGET_DEST_MQ); //Prevent automatic RFH (or JMS) headers in messages...
var consumer = session.CreateConsumer(queue);
consumer.MessageListener = new MessageListener(OnMessageReceived); //Messages received will be handled by OnMessageReceived
//Start the connection (which starts the consumer to listen etc.)
Console.WriteLine("Starting");
connection.Start();
Console.WriteLine("Started; press any key to stop");
//Now we wait...
Console.ReadKey();
//Tear down the connection
Console.WriteLine("Stopping");
connection.Stop();
Console.WriteLine("Stopped; press any key to end application");
//Keep the console around
Console.ReadKey();
}
private static void OnMessageReceived(IMessage message)
{
Console.WriteLine("Message received");
if (message is IBytesMessage)
{
var bytesmsg = (IBytesMessage)message;
var data = new byte[bytesmsg.BodyLength];
Console.WriteLine(Encoding.UTF8.GetString(data));
}
else
{
//The message is not an IBytesMessage, check to see if it is a Feedback-type message
if (message.PropertyExists(XMSC.JMS_IBM_FEEDBACK))
{
//Figure out which type of feedback message this is
int feedback = message.GetIntProperty(XMSC.JMS_IBM_FEEDBACK);
switch (feedback)
{
case MQC.MQFB_COA:
Console.WriteLine("COA received");
break;
case MQC.MQFB_COD:
Console.WriteLine("COD received");
break;
default:
//Unknown feedback type
Console.WriteLine("Unknown feedback");
break;
}
}
else
{
//The message is not a feedback message; we don't know what this is so it's unexpected.
Console.WriteLine("Unexpected message received");
}
}
Console.WriteLine("Acknowledging");
message.Acknowledge();
Console.WriteLine("Acknowledged");
}
private static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
{
//Uh oh
Console.WriteLine("*** UnhandledException ***");
Console.WriteLine((e.ExceptionObject as Exception).Message);
Console.WriteLine("******************************");
}
private static void OnXMSExceptionReceived(Exception ex)
{
//Uh oh
Console.WriteLine("*** OnXMSExceptionReceived ***");
Console.WriteLine(ex.Message);
Console.WriteLine("******************************");
}
}
}
创建一个新的（控制台）项目，添加对 IBM.XMS.dll 的引用（C:\Program Files (x86)\IBM\WebSphere MQ\Tools\Lib\IBM.XMS.dll）并运行该项目。将任何消息放入报告队列中，看看会发生什么。
当连接到 V6 服务器时一切正常，V7 导致抛出异常。
我们也尝试更新到 2.1.0.1 但无济于事...
编辑
这是我所看到的：
This is my trace log（抱歉，无法在此处添加，因为我的消息长度将超过 30000 个字符），here 是更详细的日志（traceSpecification “all”而不是“debug”）。
我还尝试将（测试）应用程序切换到 .Net V2.0.50727.5456，但这也无济于事。
编辑
我似乎已将其范围缩小到“空”的 CoA 和 CoD；当使用 MQRO_COA_WITH_DATA 或 MQRO_COA_WITH_FULL_DATA（与 CoD 相同）而不是 MQRO_COA 发送消息时，不会发生 CWSMQ0282E 错误。所以 XMS.Net 似乎在 CoA 和 CoD 的空体上崩溃了。我需要确认一些事情，以确保它不是由我的项目中的其他东西干扰造成的，但我很确定这是原因。
【问题讨论】：