Dynamodb call DocumentClient.get in AWS Lamdba is timing out

Question

Following lambda function is timing out (called via WSS API Gateway) Similar calls have worked on local DynamoDB

'''

var AWS = require("aws-sdk");
var docClient = new AWS.DynamoDB.DocumentClient({
  region: "ap-south-1",  
  httpOptions: {
    timeout: 5000
  },
  maxRetries: 3
  
});

exports.handler = async function(event, context) 
{
  
  console.log("Entering handler");
  
  try 
  {
    
     var params = 
     {
        TableName : "meeting_info",
        Key:{
          "meeting_id" :"100-200-300"
            
        }
    };
    
    try 
    {
      var data = await docClient.get(params).promise();
      
      console.log(data);
      
    } catch (e) {
      console.error(e);
    }
  } 
  catch (err) 
  {
      console.error("meeting_connections",err);
      return { statusCode: 500.4, body: 'Failed to connect: ' + JSON.stringify(err) };
  }
 
  return { statusCode: 200, body: 'Connected' };      
  
};

'''

Following are the corresponding CloudWatch logs.

START RequestId: 234b8e95-0555-45d6-811f-c6fa4d354e61 Version: $LATEST

2020-11-22T19:11:23.781Z 234b8e95-0555-45d6-811f-c6fa4d354e61 INFO Entering handler

END RequestId: 234b8e95-0555-45d6-811f-c6fa4d354e61

REPORT RequestId: 234b8e95-0555-45d6-811f-c6fa4d354e61 Duration: 10010.57 ms Billed Duration: 10000 ms Memory Size: 128 MB Max Memory Used: 85 MB Init Duration: 403.44 ms

2020-11-22T19:11:33.790Z 234b8e95-0555-45d6-811f-c6fa4d354e61 Task timed out after 10.01 seconds

What is your lambda timeout set to? Sounds like lambda is timing out after 10 seconds. — hvaughan3
it is set to 10 seconds.. Even if I change it to 5 minutes, it still times out. Give table has only 2 rows, I was expecting that 1 second was more than enough. — Sandeep Dixit
Does the Lambda's role give it access to the the DynamoDB table? — Ryan H Lewis
Lambda running in VPC? It needs a route to the internet or a DynamoDB endpoint. — jarmod

Sandeep Dixit Sandeep Dixit · Accepted Answer · 2020-11-23T08:09:01

Thanks, @jarmod, Lambda was in a VPC.

Rather than giving it access to the internet, I added a VPC endpoint to dynamo DB.

I added an endpoint to the DocumentClient configuration, now my Lambda is able to connect to DB.

''' var AWS = require("aws-sdk");

var docClient = new AWS.DynamoDB.DocumentClient({
  region: "ap-south-1",  
  endpoint:"https://dynamodb.ap-south-1.amazonaws.com",
  httpOptions: {
    timeout: 5000
  },
  maxRetries: 3
  
});

'''

Dynamodb call DocumentClient.get in AWS Lamdba is timing out

1 Answers