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Zorluk: OrtaInstrumenting Distributed Tracing with AWS X-Ray

A developer is troubleshooting a Java application running on Amazon ECS Fargate that receives HTTP requests and uses the AWS SDK for Java to write metadata to an Amazon DynamoDB table. The developer runs the AWS X-Ray daemon as a sidecar container in the ECS task. The X-Ray daemon logs confirm that it is successfully receiving trace segments and uploading them to AWS X-Ray. However, in the X-Ray trace map, the downstream calls to DynamoDB do not appear. Which action should the developer take to ensure DynamoDB calls are included in the trace?

  1. Configure the AWS SDK client in the Java application using the X-Ray SDK's TracingInterceptor to instrument downstream service calls.Cevap
  2. B
    Hardcode AWS credentials directly in the X-Ray SDK client initialization code to authenticate with the X-Ray daemon.
  3. C
    Adjust the SQS visibility timeout to allow more time for the X-Ray daemon to collect asynchronous trace segments.
  4. D
    Modify the DynamoDB integration response in API Gateway to map the proxy headers dynamically.

Cevap

Configure the AWS SDK client in the Java application using the X-Ray SDK's TracingInterceptor to instrument downstream service calls.
To include downstream calls in an AWS X-Ray trace, the application's AWS SDK client must be instrumented. For Java applications, this is done by adding the X-Ray SDK's TracingInterceptor to the AWS SDK client configuration, which automatically creates subsegments for each downstream service call.

Adım Adım Çözüm

1
Analyze the daemon logs to verify trace collection functionality.
The daemon logs show that the sidecar container is active, receiving traces locally, and successfully uploading segments to AWS X-Ray.
This rules out daemon configuration or network path issues from the ECS container to the X-Ray service.
2
Identify why downstream DynamoDB calls are missing from the trace map.
The AWS SDK client itself has not been instrumented with the AWS X-Ray SDK.
By default, the AWS SDK does not record subsegments for X-Ray. The client must be explicitly instrumented using the TracingInterceptor.
3
Configure the AWS SDK client with the TracingInterceptor.
Downstream calls automatically include tracing headers and generate subsegments.
Adding TracingInterceptor to the AWS SDK client builder allows X-Ray to track calls made to DynamoDB.

Anahtar Kavram

AWS SDK Client Instrumentation with AWS X-Ray SDK
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Konular

Instrumenting Distributed Tracing with AWS X-Ray

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