Failed to specify endpoint for TimestreamQueryClient

[RoyZhang2022]

Hi,

I have a code like this to connect to Timestream using a TimestreamQueryClient and run a simple query "select 1". It could work fine if I do not specify endpoint, that is without line clientCfg.endpointOverride = "query.timestream.us-east-1.amazonaws.com". As long as I add this line, I always get an error as below. I did not set AWS_ENABLE_ENDPOINT_DISCOVERY and there is no endpoint_discovery_enabled in my account .aws/config file. I also tried to set clientCfg.enableEndpointDiscovery to false/nullptr. Still same error. I also tried to export AWS_ENABLE_ENDPOINT_DISCOVERY to true and add a line endpoint_discovery_enabled=true in my .awc/config and keep clientCfg.enableEndpointDiscovery = true, but no use. I always get this error. I have tried on my Windows 10 + SDK 1.9.220. Also found same error on Linux. Anyone could give me a hint why it is generating this error? Thanks in advance!

"Unable to perform "Query" without endpoint discovery. Make sure your environment variable "AWS_ENABLE_ENDPOINT_DISCOVERY", your config file's variable "endpoint_discovery_enabled" and ClientConfiguration's "enableEndpointDiscovery" are explicitly set to true or not set at all."

  Aws::Client::ClientConfiguration clientCfg;
  clientCfg.enableEndpointDiscovery = true;
  clientCfg.region = "us-west-2";
  //endpoint from https://docs.aws.amazon.com/general/latest/gr/timestream.html
  clientCfg.endpointOverride = "query.timestream.us-east-1.amazonaws.com"; 

 Aws::TimestreamQuery::TimestreamQueryClient(credentials, clientCfg);

  // try a simple query with query client
  Aws::TimestreamQuery::Model::QueryRequest queryRequest;
  queryRequest.SetQueryString("SELECT 1");

  Aws::TimestreamQuery::Model::QueryOutcome outcome = queryClient_->Query(queryRequest);
  if (!outcome.IsSuccess()) {
    auto error = outcome.GetError();
    std::cout <<"ERROR: " << error.GetExceptionName() << ": "
                            << error.GetMessage());
    ......

Regards,
Roy

[RoyZhang2022]

Today I comment the endpointOverride line.

//  clientCfg.endpointOverride = "query.timestream.us-east-1.amazonaws.com"; 

Then after I succeeded to connect to Timestream, I used a DescribeEndpointsRequest to get valid endpoints. The code is like this. The result epVec contains only 1 element, which is query-cell1.timestream.us-west-2.amazonaws.com. Then I use this endpoint to test as it should be a valid one, still same error. Really do not know what to do. Looks like a bug of SDK?

  Aws::TimestreamQuery::Model::DescribeEndpointsRequest endPointReq;
  Aws::TimestreamQuery::Model::DescribeEndpointsOutcome epOutcome = queryClient_
      ->DescribeEndpoints(endPointReq);
  const Aws::Vector< Aws::TimestreamQuery::Model::Endpoint > epVec =
      epOutcome.GetResult().GetEndpoints();

[SergeyRyabinin]

Hi @RoyZhang2022 ,
I can confirm the issue exists in the 1.9.X version of the SDK:
in TimestreamQueryClient.cpp#L108-L111 there is a condition to not enable endpoint discovery if endpoint was overridden. I'm sorry for this issue and inconvenience caused.

Could you please try to upgrade to one of the latest 1.10.X versions?
We have implemented a new endpoints interface, as well as made changes how endpoint discovery integrates, it is now no longer disabled in case of endpoints override.

Best regards,
Sergey

[RoyZhang2022]

Thanks! Let me try 1.10.X

[RoyZhang2022]

I verified using 1.10.55. It works fine.

[github-actions[bot]]

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