Request timed out before it reached the Netty4HttpHandler

Question

I have converted Basic java calculator Lambda into a cient to call a coral service and its a CDK app. I have added all the dependencies including cloudauth dependencies. However I am getting below error When I try to test my lambda. 
{
  "errorMessage": "Request timed out before it reached the Netty4HttpHandler",
  "errorType": "com.amazon.coral.client.HttpTimeoutException",
  "stackTrace": [
    "com.amazon.coral.client.netty4.Netty4HttpHandler.failIfRequestTimedOut(Netty4HttpHandler.java:392)",
    "com.amazon.coral.client.netty4.Netty4HttpHandler.before(Netty4HttpHandler.java:237)",
    "com.amazon.coral.service.TransmutingContinuationHandler.before(TransmutingContinuationHandler.java:50)",
    "com.amazon.coral.service.ChainJobWorkflow.lambda$newBeforeWork$0(ChainJobWorkflow.java:94)",
    "com.amazon.coral.service.ClientContinuationOrchestrator$JobExecution.run(ClientContinuationOrchestrator.java:361)",
    "software.amazon.common.util.concurrent.StateCapture$CapturingRunnable.run(StateCapture.java:281)",
    "java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)",
    "java.base/java.util.concurrent.FutureTask.run(Unknown Source)",
    "java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)",
    "java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)",
    "java.base/java.lang.Thread.run(Unknown Source)"
  ]
}

Thanks, in advance.
https://create.hub.amazon.dev/cloned-applications/ElroyKYCIntegration

P.S. Is there any way I could do this whole thing of invoking a coral service from console?

Thanks,
Chaitai

Answer

Hello.

Is the Lambda you are using connected to a VPC?  
In that case, you will need to set up a NAT Gateway etc. to access external public endpoints.  
https://repost.aws/knowledge-center/internet-access-lambda-function

Request timed out before it reached the Netty4HttpHandler

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