Cloud Elasticity or Scalability, Whats the Difference?
I have heard and read at lot of places about Elasticity and Scalability of the cloud. In a discussion the point came across that what actually is the difference between Elasticity and the Scalability,...
View ArticleApplication logging through SLF4J : Quick Reference
The detailed information on SLF4J is available on http://www.slf4j.org. The primary reason of writing the blog is that there is lot of information but usually people do not have the time to do into the...
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REST Design Pattern and Best Practices
v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} There is lot of material available on net about the REST...
View ArticleOpenstack : No handlers could be found for logger “keystoneclient.client”
I faced the error while running command"keystone user-list"When I faced the problem I realized I was giving wrong admin token.Verify that admin token described in " /etc/keystone/keystone.conf" is same...
View ArticlePaaS : Cloud Application Platforms
Cloud is having a thunderstorm these days. All the buzzbowrds related to cloud are raining everywhere and Cloud in itself is sweeping IT in all facets. I have no intentions of creating further...
View ArticleOpenstack Keystone : No handlers could be found for logger...
When I hit the the commandKeystone user-listI get the following errorNo handlers could be found for logger "keystoneclient.client"Invalid OpenStack Identity credentials. If you run the command in debug...
View ArticleOpenstack Keystone : 'Client' object has no attribute 'service_catalog'
When I try the following command on my setupkeystone catalogorkeystone token-getI get the following error'Client' object has no attribute 'service_catalog'When I run in debug mode I can see that the...
View ArticleA required class was missing while executing...
When I was running the commandmvn jetty:runI got the message[ERROR] Failed to execute goal org.mortbay.jetty:jetty-maven-plugin:8.1.1.v20120215:run (default-cli) on project CabShareService: Execution...
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Cloud Enabled Scalability – My Story
Something prompted me to blog again after a long time and not sure if I would be motivated to continue. First, I thought to share a long pending experience, which I had the opportunity to have eight...
View ArticleBeanDefinitionStoreException: Failed to parse configuration class: Could not...
If you are creating a Spring Boot application and see the following error stack . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | ||...
View ArticleHow to terminate application running in background
At times an application do not stop properly and keep running in background, occupying port.Step 1: Identify the TCP process id binding to a specific port$>netstat -ano | find "8080" TCP...
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Beyond JSON - Flashback
A Short StoryIn the world where even services are becoming micro, I thought of writing a micro story. I cannot cover it in one blog so dividing it in multiple bogs as below;1. Flashback2. Emergence3....
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Beyond JSON - The Emergence
Previous - Beyond JSON - FlashbackIn late nineties, there was a greater push to keep finding the technology for the distributed systems. The biggest challenge was the data exchange between the...
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Beyond JSON – The Dominance
Previous - Beyond JSON - The EmergenceBy 2010, there were many JSON parsing libraries available and JSON kept gaining the popularity amongst data exchange formats. As the below graph clearly shows...
View ArticleBeyond JSON – Alternates
Previous - Beyond JSON – The DominanceWhen you want to write data to a file or send it over the network, you have to encode it as some kind of self-contained sequence of bytes (for example, a JSON...
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My first IOT Raspberry PI Experiment
I am going to describe my amazing introduction of Raspberry Pi. I was introduced to the this amazing device a couple of weeks back as part of my training and I immediately decided to procure one and...
View ArticleName server record (NS) not showing in NSLOOKUP - Godaddy + AWS
I registered a new domain in GoDaddy and my application is hosted in AWS. To enable the routing one of the steps is to create a hosted zone in AWS. Once that is created, you will receive a list of name...
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