Simple Couchbase with C# client setup failing

Question

I'm trying to set up a simple sample Couchbase setup, communicating over the C# client, but it's giving me fits. I've installed Couchbase and added a memcached bucket. Here is my simple code for communicating with it:

public static void MemcachedTest()
{
    CouchbaseClient client = new CouchbaseClient(); // failure point!
    client.Store(Enyim.Caching.Memcached.StoreMode.Set, "Testing", "Hello world");
    var test = client.Get("Testing");
}

Here is my app.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<startup>
  <configSections>
    <section name="couchbase" type="Couchbase.Configuration.CouchbaseClientSection, Couchbase"/>
  </configSections>
  <couchbase>
    <servers bucket="testbucket">
      <add uri="http://127.0.0.1"/> // tried lots of different values here.
    </servers>
  </couchbase>
  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" /></startup>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

The error is a null reference exception with no inner exception details. The stack trace is:

at Couchbase.CouchbaseClient..ctor(ICouchbaseClientConfiguration configuration)
at Couchbase.CouchbaseClient..ctor()
at CacheClientTests.Program.MemcachedTest() in C:\Dev\Experiments\CacheClientTests\CacheClientTests\CacheClientTests\Program.cs:line 72
at CacheClientTests.Program.Main(String[] args) in C:\Dev\Experiments\CacheClientTests\CacheClientTests\CacheClientTests\Program.cs:line 79
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

Why is this simple configuration failing?

Include more of the stacktrace, gist it or something if its super large. Also have you tried the uri as 'http://127.0.0.1:8091/pools' ? This answer is probably relevant looking at your problem http://stackoverflow.com/questions/12677445/unable-to-get-enyim-caching-memcachedclient-to-work-with-couchbase?rq=1 — scalabilitysolved, Feb 05 '14 at 22:12
@scalabilitysolved I included the full stack trace, and I have tried the uri you mentioned, but it didn't change anything. — Jim, Feb 05 '14 at 22:28

score 4 · Answer 1 · edited Feb 08 '14 at 00:49

Your problem is the App.config is not structured correctly and you are not specifying port 8091 in your bootstrap URI:

<configuration>
  <configSections>
    <section name="couchbase" type="Couchbase.Configuration.CouchbaseClientSection, Couchbase"/>
  </configSections>
  <couchbase>
    <servers bucket="testbucket">
      <add uri="http://127.0.0.1:8091/pools"/> 
    </servers>
  </couchbase>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
  </startup>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

That should work correctly. Your specific problem was the <startup> element wasn't lined up correctly - note that if there is a <configSections> section it must be the first element after <configuration>.

Simple Couchbase with C# client setup failing

1 Answers1