Unable to get Enyim.Caching MemcachedClient to work with Couchbase

Question

I realize that Couchbase provides a client to their memcached server, but I'm trying to get the enyim.caching client to work.

Here's my trivial c# code that uses the Couchbase client (which works) and then pretty much the same thing with the enyim MemcachedClient:

class Program
{
    static void Main(string[] args)
    {
        var client = new CouchbaseClient();

        client.Store(StoreMode.Set, "somekey", "somevalue");

        var somevalue = client.Get<string>("somekey");

        Console.WriteLine(somevalue);
        Console.ReadLine();

        var mclient = new MemcachedClient();
        mclient.Store(StoreMode.Set, "Hello", "World");
        var myVal = mclient.Get<string>("Hello");
        Console.WriteLine(myVal);
        Console.ReadLine();
    }
}

Here's my app.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
      <section name="couchbase" type="Couchbase.Configuration.CouchbaseClientSection, Couchbase"/>
      <sectionGroup name="enyim.com">
        <section name="memcached" type="Enyim.Caching.Configuration.MemcachedClientSection, Enyim.Caching" />      
      </sectionGroup>
    </configSections>
    <couchbase>
      <servers bucket="default" bucketPassword="myPassword">
        <add uri="http://127.0.0.1:8091/pools"/>
      </servers>
    </couchbase>
<enyim.com>
  <memcached>
    <servers>
      <add address="127.0.0.1" port="8091" />
    </servers>
    <socketPool minPoolSize="10" maxPoolSize="100" connectionTimeout="00:10:00" deadTimeout="00:02:00" />
    <authentication type="Enyim.Caching.Memcached.PlainTextAuthenticator, Enyim.Caching" zone="" userName="Administrator" password="myPassword" />
  </memcached>
</enyim.com>
<startup>
  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>  
</configuration>

When I step through the code, the Couchbase client appears to work fine. The Get method returns "somevalue" as expected. The code also happily steps through the MemcachedClient code, but when I step through the Store method, it hangs for 10 seconds (I think that's the timeout) and then the myVal value returns as null. No errors are thrown.

I suspect the problem revolves around the zone value in the authentication node for memcached in the config. In the DemoApp code that is in the enyim.caching source code (retrieved from Github), zone is never specified, but enyim throws an error if the zone isn't provided - i.e. the DemoApp doesn't work as is because zone isn't provided.

I'm not sure this is the problem, but I do know that I can't leave zone out, but I don't know what to use for that value. I've seen an example where 'AUTHZ' was used, but that doesn't seem to make any difference.

Does anyone see what I'm doing wrong here? Any help is appreciated! :)

Tad Donaghe · Accepted Answer · 2012-10-03T14:50:05.490

0

Ok - I figured out what was going on. I went back into the Couchbase Console and noticed that my only databucket was of type Couchbase. So, I created a new databucket of type Memcached. I noticed that this bucket type required no authentication. I did have to give it a new port.

Once I made the minimal changes to my config file, the enyim.caching MemcachedClient code worked perfectly!

Here's what my new enyim.caching config stuff looks like now:

<enyim.com>
  <memcached>
    <servers>
      <add address="127.0.0.1" port="8095" />
    </servers>
    <socketPool minPoolSize="10" maxPoolSize="100" connectionTimeout="00:10:00" deadTimeout="00:02:00" />
  </memcached>
</enyim.com>

I will mark this answer as the solution as soon as I'm able. Hopefully this may help someone from making my knuckleheaded mistake. :)

UPDATE:

Take a look in the comments for another solution provided by John Zablocki. Thanks John!

edited Oct 03 '12 at 14:50

answered Oct 01 '12 at 20:32

Tad Donaghe

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Another option would have been to keep the Couchbase bucket and set the port to 112211. Using the CouchbaseClient is still the recommended approach, but if you do want a persistent bucket, that is an option. – John Zablocki Oct 02 '12 at 14:56
I'm not sure how to do that John. The port for the Couchbase bucket is already set to 112211 (by default). I'm not sure how to set my config file up to use it... – Tad Donaghe Oct 02 '12 at 17:12
2

Code snippet follows. The app.config would be setup similarly, but instead of 8095 like you have above, you could just set it to 11211. `var cfg = new MemcachedClientConfiguration(); cfg.AddServer("192.168.56.10", 11211); cfg.Protocol = MemcachedProtocol.Binary; var m = new MemcachedClient(cfg);` – John Zablocki Oct 02 '12 at 18:34
Excellent! Thank's John! That worked like a charm. It allows me to get and set to a Couchbase bucket with both clients! Neato! – Tad Donaghe Oct 02 '12 at 20:05

Unable to get Enyim.Caching MemcachedClient to work with Couchbase

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