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Java bytecode verification is always REQUIRED
Many Java performance tuning articles propose to disable bytecode verification when running a Java program (like a Java application server or web container like Tomcat). This is WRONG and you must NOT...
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Add Apache Camel and Spring as jboss modules in WildFly
These days I am playing with Wildfly and Apache Camel and Spring. As Panagiotis suggests, a simple way to communicate between EARs / WARs is using direct-vm component of Camel. There are many ways to...
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Set WildFly binding address and shutdown using CLI
It’s very easy to bind WildFly on a hostname/IP just using command line parameters. I have a simple GNU/Linux box that I use it to play with various things, one of them is WildFly. I start WildFly...
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Storm event processor – GC log file per worker
In the last three months, I am working with a new team building a product for Big Data analytics on Telecom domain. Storm event processor is one of the main frameworks we use and it is really great....
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Build home mini PC with Cubietruck and Linux
Four months ago, I decided to build a home mini PC. Its main purpose is to act as NAS server, but it should also support additional light services too. Home mini PC requirements: ARM board (low power...
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Install Skype on Debian Jessie amd64
I have just installed Debian Jessie (testing) amd64 in my new laptop (it is really stable and the only problem I have is with dual screen). One of the rare closed source software I use is Skype (only...
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Local installation of standalone HBase and Apache Storm simple cluster
We mainly use Apache Storm for streaming processing and Apache HBase as NoSQL wide-column database. Even if Apache Cassandra is a great NoSQL database, we mostly prefer HBase because of Cloudera...
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Real time sentiment analysis example with Apache Storm
Real Time Sentiment Analysis refers to processing streams of natural language text (or voice) in order to extract subjective information. The trivial use case is for building a recommendation engine or...
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New github repository as collection of my sample projects
I have just created a new github repository to act as a collection for my sample projects (sourcevirtues-samples). This repository is consisted of various sample projects and code examples, mostly...
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Configurable ETL processing using Apache Storm and Kite SDK Morphlines
From the first days I have worked as software engineer, I always hear the same request by many sides: “We want to have everything configurable, we want to change everything on runtime and we want to...
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Local installation of standalone HBase and Apache Storm simple cluster
We mainly use Apache Storm for streaming processing and Apache HBase as NoSQL wide-column database. Even if Apache Cassandra is a great NoSQL database, we mostly prefer HBase because of Cloudera...
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Speaking about Big Data and Apache Storm at FOSSCOMM conference 16-17 April
Hello everyone, this weekend FOSSCOMM conference (Free and Open Source Software Communities Meeting) will be held at University of Piraeus. Together with Patroclos Christou, I will speak about Big Data...
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FOSSCOMM 2016 – Big Data with Apache Storm – Presentation and Demo code
FOSSCOMM (2016) conference is over!!! Presenting Big Data and Apache Storm on FOSSCOMM was a really amazing experience It was a great conference with really interesting presentations and people. A...
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Apache Storm: How to configure KafkaBolt with Flux
Flux in a mini framework that can help us define and deploy a Storm topology. Flux has various wrappers that help you define the required stream(s) and initialize your Bolts and Spouts (using...
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Speaking about Apache Storm and Apache Kafka at Big Data Meetup 24 May
Hello again. me and Patroclos Christou, we will speak about Big Data Streaming processing using Apache Storm and Apache Kafka on Tuesday 24 May at 4th Big Data Meetup. I will be glad to meet you there...
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Big Data Meetup 206 – Apache Storm – Slides and Demo code
Hi all, last Tuesday I talked about Stream processing using Apache Storm and Apache Kafka at 4th Athens Big Data Meetup. I really enjoyed the talk. The audience was really interesting as their...
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Thoughts about Agile Greece Summit 2016
Last Friday, I was at Agile Greece Summit 2016. It was a great conference with amazing speakers and very well organized. Last year, I attended Agile Greece Summit (2015) which was great, but I believe...
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Stream All the Things in Athens Big Data Meetup – 28 Feb 2017
I have some good news I am very pleasant to announce you that Dean Wampler, Big Data Architect for fast data products at Lightbend, will speak about streaming processing concepts, problems and...
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Important Production bugs and fixes for Storm and Kafka integration
I will describe here a few details for Storm and Kafka integration modules, a few important bugs that you should be aware and how to overcome some of them (especially for production installations). I...
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