Category Archives: Application Servers

Allow the use of a transacted session in a #Servlet with #JMS broker #Artemis

By | March 21, 2019

The open-source application server WildFly from which the RedHat owned JBoss application server is derived is one of the most used Java application server lately. This is caused by the strong market consolidation that is happening that caused the Java application server environment to become very restricted. Basically the only open-source enterprise grade Java application… Read More »

#EasyRSA Certificate based authentication of #SoapUI client to a secure WebService running on #JBoss or #WildFly application server

By | May 12, 2019

The following is a very quick guide on how to set up a EasyRSA certificate based authentication of SoapUI API client to connect to a WebService based API that runs on JBoss or WildFly. Generate a local CA with EasyRSA Download and install easy-rsa – https://github.com/OpenVPN/easy-rsa Go to the installation folder and change the following… Read More »

#Java #Weblogic : The server is in an incompatible state

By | November 19, 2018

WebLogic application server has its share of mind boggling error messages the same as its competition like WebSphere or JBoss. For some weird reason my servers (WebLogic version of a JVM instance) all dies and entered the weird state of “INCOMPATIBLE STATE”. Of course the author of that state label forgot to mention “incompatible with… Read More »

XA datasources with #WebSphere and #Oracle

By | December 5, 2017

When using XA data sources with Websphere and Oracle we must grant to the Oracle user rights to perform XA recovery. STEP 1: Create an XA datasource AdminTask.createJDBCProvider(‘[-scope Node=’+ node +’,Server=’+serverName +’ -databaseType Oracle -providerType “Oracle JDBC Driver” -implementationType “XA data source” -name “‘+jdbcXAProviderName +'” -description “Oracle JDBC Driver (XA)” -classpath [${ORACLE_JDBC_DRIVER_PATH}/ojdbc7.jar ] -nativePath “”… Read More »

#nginx proxy_pass an URI to another server with a different URI

By | August 22, 2017

Nginx can be used very nicely to aggregate resources after the same fronted by using it as a proxy. I want my set-up to be like: URL1: https://blog.voina.org -> nas1 hosted wordpress URL2: https://blog.voina.org/store -> nas2 hosted store with URL https://nas/store URL3: https://blog.voina.org/doc -> nas4 hosted wiki with URL https://nas4/wiki How can we do this… Read More »

Hidden Oracle dependencies when running under #Docker on Fedora/CentOS/RedHat Linux

By | June 28, 2017

There are some hidden dependencies of running oracle database in a docker container under Fedora/CentOS/RedHat Linux. STEP 1: Kernel parameters Because the Oracle engine from the Docker container uses in fact the kernel of the host machine we cannot escape the need to set up some kernel parameters on the host. On the host machine… Read More »

#Docker #Jboss dies with java.lang.OutOfMemoryError: Metaspace after several redeploys

By | May 26, 2017

There is an annoying issue with a Jboss EAP 7 Docker container I am using. After 3 deploys of my ear package I hit the “java.lang.OutOfMemoryError: Metaspace” issue. According to RedHat Solution 2038983 this is a known issue caused by: Root Cause The Metaspace is being exhausted. Either it is undersized, or there is a… Read More »