Tech-Reader.blog

  The Secret Life of JavaScript: The Generator # javascript # coding # programming # softwaredevelopment How to pause, resume, and control the flow of execution. Timothy was staring at a frozen screen. He forced a reload, but he looked defeated. function createIds () { let i = 0 ; while ( true ) { return i ++ ; // This doesn't work like I want... } } // He wanted a new ID every time he called it. // Instead, he got "0" every time. "I'm trying to create a system that generates unique IDs forever," Timothy explained. "But if I use a loop, it hangs the browser. If I don't use a loop, the variable resets every time I call the function." Margaret pulled up a chair. "You are running into the  Run-to-Completion  rule," she said. "Normal functions are like a sprint," she continued. "Once they start, they cannot stop until they finish. You need a function that can  pause ." The Asterisk ...

  AWS Bedrock Error: UnknownOperationException When Calling AWS Bedrock # aws # bedrock # devops # cloud A diagnostic guide to resolving failures caused by client mismatch or outdated AWS SDKs. Problem An attempt to invoke a model fails with an error indicating the operation is unknown or the method does not exist. Typical symptoms: Python (Boto3):   AttributeError: 'Bedrock' object has no attribute 'invoke_model' Node.js / CLI:   UnknownOperationException  or  InvalidAction General:  The code connects to AWS, but the specific inference command is rejected. Clarifying the Issue This is almost always caused by one of  two specific configuration errors : Client Mismatch (The #1 Cause):  AWS Bedrock is split into two distinct services with two different clients: bedrock : The  Control Plane  (List models, create knowledge bases). bedrock-runtime : The  Data Plane  (Invoke models, stream responses). If you try to call  invoke_...

  AWS Bedrock Error: Bedrock Works Locally but Fails in Lambda # aws # bedrock # devops # cloud A diagnostic guide for resolving AWS Bedrock invocation failures that occur **only when code runs inside AWS Lambda . Problem AWS Bedrock invocation works when run: Locally From EC2 From ECS From a public subnet …but  fails when the same code runs in AWS Lambda . Typical symptoms: No clear Bedrock service error Requests time out or silently fail IAM permissions appear correct Model access is enabled Retries do not help Inference never begins Clarifying the Issue This is  not  a Bedrock service issue. This is  usually not  an IAM issue. This failure occurs because  Lambda’s runtime environment is different from local execution , especially when: Lambda is attached to a VPC Network egress is restricted The execution role differs from local credentials The SDK/runtime version differs from local tooling The most common root cause is  network reachability . ...