Category Archives: Application Servers

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

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 »

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Glassfish: Resource monitoring from command line

Glassfish Application server is a powerful application server that can support medium to big enterprise environments. It is one of the easiest to configure and maintain application servers. No jumping through loops is required to adapt the code of your enterprise application to be deployable on it. I am an adept of command line. Because… Read More »

Linux: Search logs using bash tools

Sometimes we need to find specific things in application vast logs, sometimes 10 or 20 rotated logs each hundred of MBs each. For a quick search without using some specialized log viewer we can use the very powerful bash text processing commands. Problem: We have 10 log files each 100MB and we need to find… Read More »

DB2 + Websphere : Feature is not implemented: PreparedStatement.setBinaryStream

From a very strange reason after updating the hibernate4 from version 4.1.4 to 4.2.5 there was suddenly a weird behaviour of the EJB3.1 enterprise application I am working on. A piece of code that commits to the database an object (ProcessingStatus) containing a BLOB was throwing the following: [1/31/16 23:37:15:922 EET] 000000eb AbstractBatch Z org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl… Read More »