[rabbitmq-discuss] Possible bug when disposing connections in .NET client 2.7.0/1

[Simone Busoli]

Hi Dave, although counterintuitive the documentation of the .NET client
states that explicitly. The connection closure/disposal is not idempotent,
i.e. you shall not call it twice.
On Dec 29, 2011 1:41 AM, "Dave Stevens" <daverstevens at gmail.com> wrote:

> I am getting the following exception when disposing a connection. I
> had previously noticed this when going from RabbitMQ Client 2.5.1 to
> 2.7.0 which caused me to back out the update. I ended up going to
> 2.7.1 because I thought I found a shutdown issue in my own code. The
> exception did not present itself again until I started testing some
> reconnect logic. I first noticed it again after simply pulling the
> plug on my network.
>
> System.ObjectDisposedException: Cannot access a disposed object.
> Object name: 'System.Net.Sockets.Socket'.
> at System.Net.Sockets.Socket.SetSocketOption(SocketOptionLevel
> optionLevel, SocketOptionName optionName, Object optionValue)
> at RabbitMQ.Client.Impl.SocketFrameHandler_0_9.Close()
> at RabbitMQ.Client.Impl.ConnectionBase.FinishClose()
> at RabbitMQ.Client.Impl.ConnectionBase.HeartbeatWriteLoop()
> at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
> at System.Threading.ExecutionContext.runTryCode(Object userData)
> at
>
> System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode
> code, CleanupCode backoutCode, Object userData)
> at System.Threading.ExecutionContext.RunInternal(ExecutionContext
> executionContext, ContextCallback callback, Object state)
> at System.Threading.ExecutionContext.Run(ExecutionContext
> executionContext, ContextCallback callback, Object state, Boolean
> ignoreSyncCtx)
> at System.Threading.ExecutionContext.Run(ExecutionContext
> executionContext, ContextCallback callback, Object state)
> at System.Threading.ThreadHelper.ThreadStart()
>
> This code is reproducible consistently with the following:
>
> using System;
> using System.Threading;
> using NUnit.Framework;
> using RabbitMQ.Client;
> using RabbitMQ.Client.Framing.v0_9;
>
> namespace BT.ThirdPartyProxy.Functional.Test.FunctionalTests
> {
>    [TestFixture]
>    public class TestingObjectDispositionException
>    {
>        [Test(Description = "ObjectDispositionException")]
>        public void TestFail()
>        {
>            var cf = new ConnectionFactory
>                         {
>                             HostName = INSERT_IP_HERE,
>                             Port = 5672,
>                             RequestedHeartbeat = 2
>                         };
>            using (var connection = cf.CreateConnection())
>            using (var model = connection.CreateModel())
>            {
>                Thread.Sleep(TimeSpan.FromSeconds(1));
>                model.Close(Constants.ReplySuccess, "Goodbye");
>                connection.Close(Constants.ReplySuccess, "Goodbye");
>                Thread.Sleep(TimeSpan.FromSeconds(1));
>            }
>        }
>    }
> }
>
>
> I am using RabbitMQ.Client.dll 2.7.1.0 in .NET 4.0 app on Windows
> server 2003 going against RabbitMQ 2.7.0 running on Ubuntu.
>
> Status of node rabbit at xxx ...
> [{pid,1344},
>  {running_applications,
>     [{rabbitmq_management,"RabbitMQ Management Console","2.7.0"},
>      {rabbitmq_management_agent,"RabbitMQ Management Agent","2.7.0"},
>      {amqp_client,"RabbitMQ AMQP Client","2.7.0"},
>      {rabbit,"RabbitMQ","2.7.0"},
>      {os_mon,"CPO  CXC 138 46","2.2.5"},
>      {sasl,"SASL  CXC 138 11","2.1.9.3"},
>      {rabbitmq_mochiweb,"RabbitMQ Mochiweb Embedding","2.7.0"},
>      {webmachine,"webmachine","1.7.0-rmq2.7.0-hg"},
>      {mochiweb,"MochiMedia Web Server","1.3-rmq2.7.0-git"},
>      {inets,"INETS  CXC 138 49","5.5.2"},
>      {mnesia,"MNESIA  CXC 138 12","4.4.17"},
>      {stdlib,"ERTS  CXC 138 10","1.17.3"},
>      {kernel,"ERTS  CXC 138 10","2.14.3"}]},
>  {os,{unix,linux}},
>  {erlang_version,
>     "Erlang R14B02 (erts-5.8.3) [source] [64-bit] [smp:8:8] [rq:8]
> [async-threads:30] [kernel-poll:true]\n"},
>  {memory,
>     [{total,31177024},
>      {processes,11828776},
>      {processes_used,11772888},
>      {system,19348248},
>      {atom,1355273},
>      {atom_used,1339382},
>      {binary,84928},
>      {code,14547474},
>      {ets,1099944}]},
>  {vm_memory_high_watermark,0.39999999995232727},
>  {vm_memory_limit,5034326425}]
> ...done.
> _______________________________________________
> rabbitmq-discuss mailing list
> rabbitmq-discuss at lists.rabbitmq.com
> https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/attachments/20111229/57b20a7f/attachment.htm>