Middleware Magic

http://middlewaremagic.com/weblogic/?p=8405

How to install Oracle VirtualBox and create a CentOS 7 VM Generally for testing new components, services or products we frequently need VM machines. Specially for testing open source components. Hence we need some kind of virtualbox setup locally to test these things quickly. Oracle VirtualBox is a general-purpose full virtualiser for x86 hardware, targete...

http://middlewaremagic.com/weblogic/?p=8381

How to configure passwordless ssh between linux hosts Hi,Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. The best known example application of ssh is for remote login to computer systems by users. It is also used while doing an SCP to transfer files from one host to another host�...

Ambari Server Performance Tuning & Troubleshooting Checks. - Hortonworks Ambari Server is a Java program which interacts with Database to read the cluster details and runs on embedded jetty server. Many times we find issues with ambari server performance. It's Ambari UI operations sometimes responds slowly or the startup takes longer time. So in order to troubleshoot the...

Using the "Log4j Extras Features" with hadoop. (You can implement the same for non-Hadoop environments as well)

https://community.hortonworks.com/articles/50058/using-log4j-extras-how-to-rotate-as-well-as-zip-th.html

How to rotate as well as zip the NameNode logs using log4j extras feature? - Hortonworks As we know that the logs are important however many times we see that the logs consumes a lots of disk space. So if we want to use the log4j provided approach to control the logging behavior in a much efficient way, then in that case we can take advantage of the "apache-log4j-extra" package. More in...

My 3rd article got published in Hortonworks community forums:

https://community.hortonworks.com/content/kbentry/42872/why-ambari-host-might-have-different-public-host-n.html

Why ambari host might have different public_host_name and host_name in OpenStack ? - Hortonworks Forums, Q&A, Knowledgebase articles, gallery of the best GitHub repos for Hadoop, HDF, Spark, HDP, IOT, Streaming and Big Data. Developers, IT Professionals, and Data Scientists

For someone who is interested in Hadoop Ambari Security:

https://community.hortonworks.com/content/kbentry/39865/enabling-https-for-ambariserver-and-troubleshootin.html

Enabling Https for AmbariServer and troubleshooting secure communication - Hortonworks Forums, Q&A, Knowledgebase articles, gallery of the best GitHub repos for Hadoop, HDF, Spark, HDP, IOT, Streaming and Big Data. Developers, IT Professionals, and Data Scientists

WebLogic12c with t3s (SSL) secure protocol and the JMX client As part of this article we will see how to use the “t3s” SSL based secure protocol to interact with WebLogic 12.2.1. We will be developing a simple MBean client which will access sime of the MBeans present on weblogic over the SSL. We are going to implement One Way SSL for this demo. With one-way SS…

http://middlewaremagic.com/weblogic/?p=8334

Implementing SOA using Opensource Apache Camel JMS Component on WebLogic 12c

Can Apache Camel be a cheapest and most reliable option /alternative for implementing SOA on WebLogic as it supports most of the Enterprise Integration Patterns ?

Implementing SOA using Opensource Apache Camel JMS Component on WebLogic 12c

http://middlewaremagic.com/jboss/?p=2770

Server Side Java Script Nashorn, WildFly10, Undertow with MySQL (part-3)

WildFly 10 (undertow) allows users to use the JavaScript on the server side with the help of the Nashorn JavaScript engine offered by JDK8. It is going to change the whole behavior how the Application Server behave in future.

Server Side Java Script Nashorn, WildFly10, Undertow with MySQL (part-3) This is the third part of in the series of JavaScript in which we are going to see how to implement the Server Side Java Script inside the WildFly 10 Container. As we know that WildFly provides the “undertow” container inside it. Undertow is a flexible performant web server written in java, providin…

http://middlewaremagic.com/jboss/?p=2760

JDK8 Based Nashorn JavaScript & Java to interact with MySQL Database. (part-2)

JDK8 Based Nashorn JavaScript & Java to interact with MySQL Database. (part-2) As part of out previous article “Why Nashorn Java Scripting in Java8, Is it Poisonous for Java? (part-1)”, We discussed some very basics of JDK8, Nashorn Java Script and about the “$JAVA_HOME/bin/jjs” command line tool. We also learned that how we can invoke a JavaScript snippet or script file from…