1.9.0 client with elastic 1.7.5 GetTemplate fails with exception.

[niemyjski]

I'm doing a put

04:21.74738 T:DailyEmployeeIndex - PUT http://localhost:9200/_template/employees
{
  "template": "employees-v1-*",
  "settings": {},
  "mappings": {},
  "warmers": {},
  "aliases": {
    "employees": {}
  }
}

And then I do a Get

var template = await _client.GetTemplateAsync("employees");
Assert.True(template.IsValid);

which returns (via http GET _template/employees)

{
   "employees": {
      "order": 0,
      "template": "employees-v1-*",
      "settings": {},
      "mappings": {},
      "warmers": {},
      "aliases": {
         "employees": {}
      }
   }
}

Throws:

Newtonsoft.Json.JsonSerializationException
Could not create an instance of type Nest.ICreateAliasOperation. Type is an interface or abstract class and cannot be instantiated. Path 'employees.aliases.employees', line 1, position 118.
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateNewObject(JsonReader reader, JsonObjectContract objectContract, JsonProperty containerMember, JsonProperty containerProperty, String id, Boolean& createdFromNonDefaultCreator)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateDictionary(IDictionary dictionary, JsonReader reader, JsonDictionaryContract contract, JsonProperty containerProperty, String id)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, Object target)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateDictionary(IDictionary dictionary, JsonReader reader, JsonDictionaryContract contract, JsonProperty containerProperty, String id)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)
   at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
   at Nest.NestSerializer.DeserializeUsingSettings[T](Stream stream, JsonSerializerSettings settings) in c:\code\elasticsearch-net\src\Nest\ExposedInternals\NestSerializer.cs:line 105
   at Nest.NestSerializer.Deserialize[T](Stream stream) in c:\code\elasticsearch-net\src\Nest\ExposedInternals\NestSerializer.cs:line 85
   at Nest.ElasticClient.DeserializeTemplateResponse(IElasticsearchResponse response, Stream stream) in c:\code\elasticsearch-net\src\Nest\ElasticClient-Template.cs:line 169
   at Elasticsearch.Net.Connection.RequestHandlers.RequestHandlerAsync.DeserializeAsyncToResponse[T](Stream response, ITransportRequestState requestState, ElasticsearchResponse`1 typedResponse, ReadResponse`1 readResponse) in c:\code\elasticsearch-net\src\Elasticsearch.Net\Connection\RequestHandlers\RequestHandlerAsync.cs:line 352
   at Elasticsearch.Net.Connection.RequestHandlers.RequestHandlerAsync.<>c__DisplayClass7_0`1.<ReturnTypedResponse>b__1(Task`1 gotStream) in c:\code\elasticsearch-net\src\Elasticsearch.Net\Connection\RequestHandlers\RequestHandlerAsync.cs:line 146
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   at Elasticsearch.Net.ExceptionExtensions.RethrowKeepingStackTrace(Exception exception) in c:\code\elasticsearch-net\src\Elasticsearch.Net\Extensions\ExceptionExtensions.cs:line 21
   at Elasticsearch.Net.Connection.Transport.<>c__DisplayClass31_0`1.<DoRequestAsync>b__0(Task`1 t) in c:\code\elasticsearch-net\src\Elasticsearch.Net\Connection\Transport.cs:line 357
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   at Elasticsearch.Net.ExceptionExtensions.RethrowKeepingStackTrace(Exception exception) in c:\code\elasticsearch-net\src\Nest\Extensions\ExceptionExtensions.cs:line 21
   at Nest.ElasticClient.<>c__DisplayClass492_0`4.<Nest.IHighLevelToLowLevelDispatcher.DispatchAsync>b__0(Task`1 r) in c:\code\elasticsearch-net\src\Nest\ElasticClient.cs:line 101
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Foundatio.Repositories.Elasticsearch.Tests.IndexTests.<CanReindexTimeSeriesIndex>d__7.MoveNext() in C:\Code\Foundatio.Repositories\src\Elasticsearch\Tests\IndexTests.cs:line 122
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Xunit.Sdk.TestInvoker`1.<>c__DisplayClass46_1.<<InvokeTestMethodAsync>b__1>d.MoveNext() in C:\BuildAgent\work\cb37e9acf085d108\src\xunit.execution\Sdk\Frameworks\Runners\TestInvoker.cs:line 227
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Xunit.Sdk.ExecutionTimer.<AggregateAsync>d__4.MoveNext() in C:\BuildAgent\work\cb37e9acf085d108\src\xunit.execution\Sdk\Frameworks\ExecutionTimer.cs:line 48
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Xunit.Sdk.ExceptionAggregator.<RunAsync>d__9.MoveNext() in C:\BuildAgent\work\cb37e9acf085d108\src\xunit.core\Sdk\ExceptionAggregator.cs:line 90

[niemyjski]

I did a GET _aliases and it returns

{
   ".marvel-2016.08.02": {
      "aliases": {}
   },
   "identity": {
      "aliases": {
         "identity": {}
      }
   }
}

[niemyjski]

The alias doesn't yet exist because an index hasn't yet been created.

[Mpdreamz]

Cheers @niemyjski added a unit test for this and fixed it in 1.x

[niemyjski]

Thanks! Was this also ported to master? Wondering if this is an issue there as well.

[Mpdreamz]

No need we have tests for this in 2.x and master 😄