Gray Failures: What is it and how to detect one?

If you are reading this article , i guess you are curious to know about gray failures and different methods to detect gray failures. 

Hopefully this article will give you insight on question in your mind. 

https://aws.amazon.com/blogs/mt/detecting-gray-failures-with-outlier-detection-in-amazon-cloudwatch-contributor-insights/

How to select the best machine learning service in AWS

 

If you looking for directional information on how to select an Machine learning algorithm, check the below blog.   The blog i wrote though is specific for manufacturing but it can provide direction on different use cases

https://aws.amazon.com/blogs/industries/selecting-the-best-automatic-machine-learning-to-meet-your-manufacturing-needs/

Testing AWS Cloudformation Template

 Very interesting tool to test the cloud formation templates. Check it out 

TaskCat

https://github.com/aws-ia/taskcat

Architecting Resilient application on AWS

 Great whitepaper on improving resiliency of distributed systems:

https://docs.aws.amazon.com/whitepapers/latest/availability-and-beyond-improving-resilience/availability-and-beyond-improving-resilience.html

AWS CDK Samples

 Want to learn AWS CDK with samples :

Check these out:

https://github.com/aws-samples/aws-cdk-examples#Examples

https://cdkpatterns.com/patterns/all/

Tranformation in Manufacturing

 Do you want to know how CPG industry  is undergoing transformation using IoT technology, read the blogs on how AWS partners are using AWS technologies to build solutions for CPG industry

https://aws.amazon.com/blogs/industries/how-to-build-a-smart-production-solution-with-dxcs-spark-platform/

Developing Custom web portal for the AWS SiteWise Service

 Are you looking to develop a custom application to show the data from AWS SiteWise?

Check out the AWS IoT Application Kit

AWSIoTPythonSDK.exception.AWSIoTExceptions.connectTimeoutException

Are you getting the below error when sening data to IoT Core using the "AWSIoTPythonSDK." ?

Here is my error :

  File "/usr/local/lib/python3.6/site-packages/AWSIoTPythonSDK/MQTTLib.py", line 520, in connect
    return self._mqtt_core.connect(keepAliveIntervalSecond)
  File "/usr/local/lib/python3.6/site-packages/AWSIoTPythonSDK/core/protocol/mqtt_core.py", line 199, in connect
    raise connectTimeoutException()
AWSIoTPythonSDK.exception.AWSIoTExceptions.connectTimeoutException

The below can be reason for  this issue

1- You have not defined policy to allow the sending message to the IoT Core topic. If that is the case create a policy for the "Thing"

You need to define

  Publish/Subscribe policy 

Connect and Publish Policy

 

If the policies are defined than check the active version of policy, In my case old policy was active

 

2- Make the latest one active  

 Check this  under your "Thing" policy settings:

 

 

 Hopefully one of it works. Leave comment if it does help

Thanks