Knowledge Center Monthly Newsletter - June

New Knowledge Center articles

Find all new Knowledge Center articles published in May.

Amazon Bedrock

How do I optimize prompts to achieve deterministic responses on Amazon Bedrock?

How do I prevent read timeouts in Python when I use large models in Amazon Bedrock?

How do I resolve validation exceptions in Amazon Bedrock?

How do I troubleshoot the permission errors I get when I create a knowledge base in Amazon Bedrock?

How do I use the Amazon OpenSearch Serverless collection with a private network policy to create a knowledge base in Amazon Bedrock?

How do I use the RetrieveAndGenerate API to reuse a knowledge base session in Amazon Bedrock?

Amazon Connect

How do I associate multiple phone numbers to Amazon Connect contact flows as a batch of changes?

Amazon DynamoDB

How do I troubleshoot "Unexpected token. Remainder of the file will not be processed." error when I import data from Amazon S3 to DynamoDB?

How do I turn on accidental delete protection for my DynamoDB tables?

How do I turn on DynamoDB point-in-time recovery?

How do I minimize my DynamoDB costs?

How do I troubleshoot the "provided key element does not match the schema" error in DynamoDB?

Why do my DAX nodes suddenly restart in recovery mode?

Amazon Elastic Compute Cloud (Amazon EC2)

How do I troubleshoot Window update failures for Amazon Elastic Compute Cloud instances?

Amazon Elastic Container Service (Amazon ECS)

FAQs: Amazon ECS tasks that are stuck in a lifecycle state

Amazon Elastic Kubernetes Service (Amazon EKS)

FAQs: Back up and restore an Amazon EKS cluster

How do I resolve the "No space left on device: unknown" error on my Amazon EKS worker node?

FAQs: Amazon EKS upgrade insights

FAQs: Fargate Pod eviction notice

Amazon Inspector

How do I exclude specific AWS resources from Amazon Inspector scans?

Amazon Lightsail

How do I stop, start, restart, or check the status of a Bitnami service in Lightsail?

How do I reset a WordPress website's administrator email in Lightsail?

How do I change my cPanel or WHM contact email address in Lightsail?

Amazon Managed Workflows for Apache Airflow (Amazon MWAA)

How do I retrieve the total worker count that's configured for auto scaling in Amazon MWAA?

Amazon Relational Database Service (Amazon RDS)

How can I troubleshoot performance issues on an Amazon RDS for Oracle DB instance?

Amazon Route 53

How do I troubleshoot CNAME record resolution issues when I use a conditional forwarder in my Windows DNS server?

Amazon Simple Queue Service (Amazon SQS)

Why is my Amazon SQS queue not receiving EventBridge notifications?

AWS Certificate Manager (ACM)

How do I extend the validity period of my ACM certificates?

AWS Lambda

How do I list Lambda functions with provisioned and reserved concurrency in an AWS Region?

AWS WAF

How do I change the priority of the rules in my AWS WAF web ACL?

How do I turn on AWS WAF on a CloudFront distribution?

How do I use an aggregation key to configure a rate limit rule in AWS WAF?

How do I configure a custom rule to allow a specific host name in AWS WAF?

How do I use AWS WAF to allow or block access to specific URI paths?

How do I identify traffic patterns invoked by SQLi and XSS rules in AWS WAF?

How do I configure a CAPTCHA rule for a specific URL in AWS WAF?

Elastic Load Balancing (ELB)

How do I investigate issues related to the CA bundle for mTLS listeners on the Application Load Balancer?

How do I use AWS private CA to configure mTLS on the Application Load Balancer?

How do I troubleshoot health check issues with the Application Load Balancer type target for a Network Load Balancer?

How do I configure the Application Load Balancer to drop headers that aren’t valid?

Updated Knowledge Center articles

Find all Knowledge Center articles updated in May. We update our articles to stay accurate and relevant.

Amazon API Gateway

How do I set up an Amazon Cognito user pool as an authorizer on an API Gateway REST API?

How do I allow only specific IP addresses to access my API Gateway REST API?

Why do I get API Gateway "401 Unauthorized" errors after I create a Lambda authorizer?

How do I troubleshoot CORS errors from my API Gateway API?

How do I troubleshoot HTTP 403 Forbidden errors when I use a Lambda authorizer with an API Gateway REST API?

Amazon CloudWatch

How do I resolve the "Log group does not exist" error for Lambda function logs in the CloudWatch console?

Why isn't my metric available in the CloudWatch console?

Amazon DynamoDB

How do I speed up the creation of a global secondary index for a DynamoDB table?

Why is my Amazon DynamoDB provisioned table throttled?

How do I resolve the error "Cannot create a replica of table in region" when I try to add a replica to my DynamoDB Global Table?

How can I troubleshoot high latency on an Amazon DynamoDB table?

Why does my Amazon DynamoDB table restoration take a long time?

Amazon Elastic Compute Cloud (Amazon EC2)

How do I revert to a known stable kernel after an update prevents my Amazon EC2 instance from rebooting successfully?

How do I fix sudo errors on my EC2 instance when I run the sudo command?

How can I turn off automatic backups in Amazon EFS and remove the stored backup data?

How do I convert the default MBR partitioning scheme to GPT of my EC2 Ubuntu instance so that I can bypass the 2-TiB limit for MBR partitions on my EBS volume?

How can I avoid DNS resolution failures with an Amazon EC2 Linux instance?

How do I turn on the EPEL repository for my Amazon EC2 instance that runs CentOS, RHEL, or Amazon Linux?

How can I find the network PPS limit for Amazon EC2 instances?

How do I troubleshoot an Amazon EC2 instance that stops or terminates when I try to start it with the "InternalError" or "Client.UserInitiatedShutdown" error?

How do I use EC2 Instance Connect to troubleshoot issues when I connect to my EC2 instance?

How can I make my secondary network interface work in my Ubuntu EC2 instance?

Amazon Elastic Container Service (Amazon ECS)

How do I resolve the "Image does not exist" error when my tasks fail to start in my Amazon ECS cluster?

How do I mount an Amazon EFS file system on an Amazon ECS container or task that runs on Fargate?

How do I launch Amazon ECS instances with Amazon ECS optimized AMIs?

What do I need to know about CPU allocation in Amazon ECS?

How do I resolve the "error pulling image configuration: error parsing HTTP 403 response body" error in Amazon ECS?

How do I troubleshoot issues related to scheduled tasks in Amazon ECS?

How do I resolve the error "An error occurred (TargetNotConnectedException) when calling the ExecuteCommand operation" in Amazon ECS?

How can I get my AWS::ECS::Service resources out of UPDATE_IN_PROGRESS or UPDATE_ROLLBACK_IN_PROGRESS status?

How do I use a Splunk log driver with an Amazon ECS task on Fargate?

How can I get my Amazon ECS tasks that use the Amazon EC2 launch type to pass the Application Load Balancer health check?

How do I troubleshoot connectivity issues between my Amazon ECS tasks for an Amazon EC2 launch type and an Amazon RDS database?

How do I troubleshoot missing container logs for Amazon ECS or Amazon EKS?

How do I increase the available disk space on my Amazon ECS container instances when I launch my ECS cluster from the AWS Management Console?

How do I allow Amazon ECS tasks to pull images from an Amazon ECR image repository?

How do I increase the available disk space on my Amazon ECS container instances if I launched my container instances as standalone Amazon EC2 instances?

Amazon Elastic File System (Amazon EFS)

Why do I receive the "maximum number of throughput mode changes or provisioned throughput value decreases" error when I modify the throughput mode on my EFS file system?

Amazon Elastic Kubernetes Service (Amazon EKS)

How do I troubleshoot cluster creation errors in Amazon EKS?

Amazon ElastiCache

How do I resolve the CROSSLOT error that I receive when I use multi-key operations on an ElastiCache for Redis self-designed cluster with cluster mode turned on?

How do I minimize downtime when my ElastiCache for Redis is scaling?

How do I troubleshoot the “Create-failed” or “Permission denied” error that occurs when I try to restore my ElastiCache cluster from S3?

How do I resolve the error "An error occurred (TargetNotConnectedException) when calling the ExecuteCommand operation" in Amazon ECS?

How do I troubleshoot increased CPU usage in my ElastiCache for Redis self-designed cluster?

How do I troubleshoot "400 Error Code" errors that I receive when I use CloudFormation for ElastiCache?

How do I troubleshoot errors that occur when I change my ElastiCache for Redis node type?

How do I turn on log delivery for Redis SLOWLOG in an ElastiCache for Redis self-designed cluster?

How do I troubleshoot an ElastiCache self-designed cluster that can't scale down?

How do I determine the actual available memory in my ElastiCache node?

How do I resolve Redis client read requests that are redirected to the primary node of a shard instead of a replica node in ElastiCache for Redis?

How do I avoid a long time period when I scale up my ElastiCache for Redis self-designed cluster with cluster mode turned off?

How do I resolve the CROSSLOT error that I receive when I use multi-key operations on an ElastiCache for Redis self-designed cluster with cluster mode turned on?

How do I assign a new parameter group to my existing ElastiCache self-designed cluster without restarting the cluster?

How do I troubleshoot the READONLY error that I receive after a failover in my ElastiCache for Redis self-designed cluster?

How do I resolve the increase in swap activity in my ElastiCache instances?

How do I migrate my ElastiCache for Redis self-designed cluster within a Region, cross Region, or to a different account?

How do I turn on Multi-AZ with automatic failover in my ElastiCache for Redis self-designed cluster?

How do I resolve the OOM command not allowed error for an ElastiCache for Redis self-designed cluster node?

How do I troubleshoot high latency issues in ElastiCache for Redis?

How do I choose the appropriate instance type and node size for my ElastiCache for Redis self-designed cluster?

Amazon Lightsail

Where can I find SSH login credentials so that I can connect to my Lightsail instance from an SSH client?

What are the minimum IAM permissions needed to use VPC peering to set up communication between Lightsail and other AWS services?

How do I install WordPress in a Lightsail instance instead of the WordPress blueprint that Bitnami provides?

How do I remove the restriction on port 25 from my Lightsail instance?

Amazon Managed Workflows for Apache Airflow (Amazon MWAA)

How do I install libraries in my Amazon MWAA environment?

How do I use Amazon SES as the SMTP host to send emails from Amazon MWAA DAG tasks?

Amazon Q in QuickSight

How can I connect QuickSight to a private Amazon RDS data source in a different AWS Region or AWS account?

Amazon Relational Database Service (Amazon RDS)

Why did the admin user for my RDS for SQL Server instance lose access and how can I gain it back?

Why is my RDS for SQL Server instance stuck in the rebooting state?

How do I use Enhanced Monitoring to create CloudWatch alarms to monitor my Amazon RDS SQL Server DB instance's memory usage?

How can I resolve common issues when I use read replicas in Aurora?

Amazon Route 53

How do I activate reverse DNS functionality for Route 53 with a PTR record?

Amazon SageMaker

Why does my SageMaker endpoint go into the failed state when I create or update an endpoint?

Amazon Simple Notification Service (Amazon SNS)

Why did I get an email from AWS that states that my Amazon SNS subscription was manually deactivated?

Amazon Simple Storage Service (Amazon S3)

How can I retrieve an Amazon S3 object that was deleted in a versioning-enabled bucket?

Amazon WorkSpaces

Why can't I use the WorkSpaces client to authenticate to my WorkSpace?

How do I recover an Amazon WorkSpaces desktop that has an UNHEALTHY status?

AWS Account Management

How do I update my telephone number to reset my lost MFA device?

AWS Backup

How can I get notifications for AWS Backup jobs that fail?

AWS Batch

How do I resolve the "DockerTimeoutError" error in AWS Batch?

AWS Certificate Manager (ACM)

Why is my ACM certificate renewal status still "Pending validation" after I used the ACM managed renewal process for my domain name?

Can I pin an application that runs on AWS to a certificate issued by ACM?

How do I resolve ACM certificate errors that occur when I used HTTPS to access my website?

AWS Cloud Development Kit (AWS CDK)

How do I resolve the "Already Exists" error that I receive when I redeploy my AWS CDK code after I delete the stack from the deployment?

AWS CloudFormation

How do I resolve the "This template does not include any resources to import" error in AWS CloudFormation?

How do I use the Fn::Sub function in AWS CloudFormation with Fn::FindInMap, Fn::ImportValue, or other supported functions?

How do I delete a stack instance from a CloudFormation stack set in a closed or suspended AWS account?

How do I prevent "Rate exceeded" errors in CloudFormation?

AWS Database Migration Service (AWS DMS)

How can I improve the performance of the AWS SCT conversion tool when I use AWS DMS?

AWS Elastic Beanstalk

How can I create additional listeners for Elastic Beanstalk environments that use a shared load balancer?

AWS Glue

Why does my AWS Glue crawler fail with an internal service exception?

AWS Lambda

How do I give internet access to a Lambda function that's connected to an Amazon VPC?

AWS Trusted Advisor

How do I use Trusted Advisor? How do I set up email notifications for AWS Trusted Advisor in my account?

AWS WAF

How do I apply a rate limit on a specific request parameter or URI in AWS WAF?

How do I use AWS WAF to block HTTP requests that don't contain a user agent header?

How do I migrate from AWS WAF Classic to AWS WAF and what is the downtime during the migration?

How do I configure AWS WAF to protect my resources from common attacks?

How can I detect false positives caused by AWS Managed Rules?

How do I allow requests from a bot that's blocked by an AWS WAF Bot Control rule group?

How do I use AWS WAF to allow or block requests from a specific country or geolocation?

Elastic Load Balancing (ELB)

How do I troubleshoot failed health checks for Application Load Balancers?

How do I send custom HTTP responses for specific URLs from an Application Load Balancer?

OpenSearch

How do I troubleshoot high CPU utilization on my Amazon OpenSearch Service cluster?