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https://issues.apache.org/jira/browse/IGNITE-13160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17218525#comment-17218525
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Igor Sapego commented on IGNITE-13160:
--------------------------------------

[~ptupitsyn] looks good to me.

> .NET: wrong affinity key registration with AffinityKeyMapped attribute
> ----------------------------------------------------------------------
>
>                 Key: IGNITE-13160
>                 URL: https://issues.apache.org/jira/browse/IGNITE-13160
>             Project: Ignite
>          Issue Type: Bug
>          Components: platforms
>    Affects Versions: 2.8.1
>            Reporter: Alexandr Shapkin
>            Assignee: Pavel Tupitsyn
>            Priority: Major
>             Fix For: 2.10
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When QueryEntities is set alongside a custom key that utilizes the 
> AffinityKeyMapped attribute, the field won't be taken into account for some 
> reason. When QueryEntities configuration gets removed, all works fine, 
> setting KeyConfiguration manually helps as well. At the same time, the 
> BinaryType registration itself looks fine.
> After the investigation, it turned out that affinityKey field is not being 
> registered on cache registration, and null is being cached instead. Later on 
> Ignite correctly tries to register a custom class as a key, but it's never 
> being updated internally case the real value is already cached.
>  
> NOTE: there is a workaround - you need to specify the key configuration 
> explicitly:
> {code:java}
> cacheConfiguration.KeyConfiguration = new List<CacheKeyConfiguration>(1)
> {
>  //affinityKey should be auto adjusted with Reflection
>  new CacheKeyConfiguration(typeof(MyKey))
> };
>  
> {code}
>  
> Reproducer (add to the AffinityTest.cs):
> {code:java}
>         /// <summary>
>         /// Tests AffinityKeyMapped attribute should map to the same 
> partitions
>         /// for the same field value.
>         /// </summary>
>         [Test]
>         public void TestCustomAffinity()
>         {
>             IIgnite g = Ignition.GetIgnite("grid-0");
>             var cacheCfg = new CacheConfiguration("mycache")
>             {
>                 // Without QueryEntities tests passes.
>                 QueryEntities = new List<QueryEntity>()
>                 {
>                     new QueryEntity(typeof(MyKey), typeof(int))
>                 }
>             };
>             g.GetOrCreateCache<MyKey, int>(cacheCfg);
>             var key1 = new MyKey {Data = "data1", AffinityKey = 1};
>             var key2 = new MyKey {Data = "data2", AffinityKey = 1};
>             ICacheAffinity aff = g.GetAffinity(cacheCfg.Name);
>             Assert.AreEqual(aff.GetPartition(key1), aff.GetPartition(key2));
>         }
>         public class MyKey
>         {
>             [QuerySqlField]
>             public string Data { get; set; }
>             [AffinityKeyMapped]
>             public long AffinityKey { get; set; }
>         }
> {code}



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