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OGh APEX World 2014

by Michel van Zoest on March 26, 2014 · 0 comments

Tweet On Tuesday, March 25th the 5th edition of the APEX World event was held by the Dutch Oracle User Group OGh. It has always been the largest APEX only event in the world, but this year it was even bigger. Almost 350 people came to Zeist to listen to a group with some of […]

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A while ago I tried to install Oracle 11g R2 Express Edition on a 64-bit Ubuntu machine. This proved to be not as easy as you would expect. With the combined information from various blogs and articles, I finally got it to work.

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Using the Maven Release plugin with Mercurial SCM

March 17, 2014

The Maven Release plugin can be used to release a project using Maven. Normally, a release can be made in two simple steps: prepare en perform. When the Mercurial SCM (Source Code Management) is used, this process requires a little more configuration. I performed the described steps using Hg (Mercurial) version 2.0.2 and maven-release-plugin version 2.4.2 on a Ubuntu 12.04 VM. The used distribution servers are Nexus 2.2-01 instances.

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Tweaking the entropy pool for a better SOA performance

March 14, 2014

At my current assignment, I’ve gone to great lengths to improve the Oracle SOA Enterprise Manager Console performance. One of the actions I took, was purging about 700 gigabytes of data from the dehydration store. Although that solved lots of other problems, the EM still wasn’t very responsive. Loading composite details could take op to 20 minutes, it they ever loaded at all. Apparently, the database was ok, because there was no load at all there. The java processes used a lot of CPU and memory though.

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BPM workspace: Scripted security

February 14, 2014

When implementing BPM processes, application roles can be defined, which will be created in the policy store. To enable users to work with the processes, groups are assigned to these application roles. Users are ofcourse assigned to their respective groups. Management of the BPM process application roles is available in Enterprise Manager Fusion Middleware Control or the BPM workspace.

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How to remove UMS Driver from Weblogic

February 14, 2014

Last year I got a message from a customer that he had some problem with his notification adapter in SOA Suite. His description was: “I’m not receiving all the email that I expect”.

After analyzing the whole configuration of Weblogic we saw that there were multiple UMS configured, and only one was configured to a SMTP server the others were not configured at all. Weblogic uses load-balancing with all his UMS Drivers for sending the email. So the only thing that we had to do is removing the UMS Driver from Weblogic, that was my next big challenge, that is why I have wrote this blog “How to remove UMS Driver from Weblogic”, it’s a small tutorial for creating a UMS Drive via WLST and after that how to remove it completely from your Weblogic configuration.

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EM Cloud Control: Agent Patch fails: Current user not file owner

February 7, 2014

When I was patching all of our agents on our linux nodes with the latest PSU (, I encountered an error with one of the linux nodes. Somehow privilege delegation hasn’t been applied yet to this node. That’s easy to fix.

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EM Cloud Control: Using emcli to bulk modify host credentials

February 6, 2014

In our environment all machines are linked to an LDAP server for authentication (AD in this case). You need to logon to machines with your personal credentials and use sudo to logon to a system account. This is a common practice and easily implemented in EM Cloud Control through ‘named credentials’. In my case I have several system accounts I need to be able to ‘sudo’ to, to perform actions like patching. So for every system account I created a named credential with the appropriate sudo properties.

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APEX 5.0 Early Adopters release available

February 1, 2014

This morning (for us on CET) brought a surprise from the developers over at Oracle Application Epress headquarters. The Early Adopters release for APEX 5.0 has been made available to the public.

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