Oracle OpenWorld Submissions – The Full Monty

Here one day before deadline, I have entered almost my entire current catalog of presentations for consideration in the Oracle OpenWorld 2013 agenda. One new for this year: “Worst Oracle ADF Project Ever” ;-)

If you would like me to speak at one of your events, the following are the presentations (more...)

WebLogic-In-A-Box

Oracle has just announced a new Oracle Database Appliance, this time with WebLogic. So if you are looking to move to WebLogic and want a high availability environment, read on.

Like the previous editions of the Oracle Database Appliance, this is a physical 4-U rack mounted box that comes with (more...)

Work Managers in WebLogic Server

I found a brilliant Work Manager demo video by James Bayer. There also is a accompanying slide show.

James also has an older post where you can download the source and the war file. It is great when you can get your hands on the source of demos so you (more...)

Getting the size of the HTTP Session State in WebLogic

I recently had to find the size of the data stored in the HTTP Session State. On MOS I found this note:
“Session Replication Fails Due To Non-Serializable Object: JSP Test Page [ID 1073386.1]“.
It contains a JSP test page that will show you if your session data is (more...)

Enterprise Manager will not start after ADF upgrade

I recently had to upgrade a WebLogic Server with ADF for a customer. It was WebLogic 10.3.4 to 10.3.6 and ADF 11.1.1.4 to 11.1.2.3. They also used Enterprise Manager.

Everything went fine except for the Enterprise Manager which ended up (more...)

Auditing users in WebLogic Server

If you do a default installation of the WebLogic Server user activity is not audited. WebLogic has a build in Auditing Provider but it has to be enabled.

The Audit Provider can log these events.

To enable it via the Admin Console got to Security Realms => myrealm => Providers (more...)

Is your WebLogic Server slooow? Might be because of low entropy

On Linux low entropy can cause certain operations to be very slow.

SSL operations need entropy to ensure randomness. Entropy is generated by the OS when you use the keyboard, the mouse or the disk.

If an SSL operation is missing entropy it will wait until enough is generated.

If (more...)

Fasten your Oracle Forms and Reports 11g Server start on Unix derivates

Do you see a slow start of your weblogic managed server for forms & reports on unix derivate? We have this problem on Suse SLES 11 and forms and reports 11.1.2.

In November I attended the annual DOAG (German Oracle User Group) conference in Nuremberg. There I’ve heare an interesting presentation from Jan-Peter Timmermann about “Performance with Forms 11gR2 Weblogic 10.3.x”.

One snippet of the presentation was an bug in the jdk which slows down the start of managed weblogic servers. It has to do with the random number generator during loading the OPSS Policy Provider for (more...)

Configure BPM engine to publish to BAM

Configure BPM engine to publish to BAM

By default the Oracle BPM engine (Business Process Management) is configured so it won’t publish events to BAM (Business Activity Management). So should you choose to use BAM and use these great dashboards, you have set the DisableActions property to false/empty. Here is (more...)

Build and Deploy OSB projects with Maven

2 years ago I already did the same with ANT and now I migrated these scripts to Maven. These Maven poms can still do the same like my ANT scripts.
  • Build and deploy an OSB OEPE workplace
  • Build one OSB project.
  • Export OSB projects from an OSB server and generate (more...)

Missing IPV6 address for local network interfaces causes service timeout

Year ago I installed Weblogic server + Oralce database server for a customer. Few months later my colleagues asked me whether something has changed in the environment or if something happened at the data center, because they started to see Java exceptions for unknown hostname for a web service they were calling and this was happening only from time to time. We’ve checked the firewall rules, DNS and all the stuff, but everything seemed to be working fine. The only solution by that time they came out was to add the hostname to the hosts file of the Weblogic server. (more...)

Server subsystem failed. Reason: java.lang.NumberFormatException: null

Our admin server of the osb development environment failed to restart because of a full disk.
After cleaning up the admin server still wouldn’t start resulting in the next stack.

<Sep 28, 2012 10:18:16 AM CEST> <Critical> <WebLogicServer> <BEA-000386> <Server subsystem failed. Reason: java.lang.NumberFormatException: null
java.lang.NumberFormatException:  (more...)

Installing Oracle Forms/Reports 11.1.1.6 on Red Hat 6 (64-bit) using JDK 7

Here is my experiences with installing Forms and Reports 11.1.1.6 on Red Hat 6 (64-bit) using JDK 7.

Forms/Reports currently exists in two flavors 11.1.1.6 and 11.1.2.0. 11.1.1.6 is the main Fusion Middleware release. As far as I (more...)

Do WebLogic configuration from ANT

With WebLogic WLST you can script the creation of all your Application DataSources or SOA Integration artifacts( like JMS etc). This is necessary if your domain contains many WebLogic artifacts or you have more then one WebLogic environment. If so, you want to script this so you can configure a (more...)

WebLogic JMS / AQ bridge with JBoss AS 7

There are different ways to exchange JMS messages between WebLogic and JBoss Application Server 7. In this blogpost I will explain how you can retrieve JMS messages from JBoss ( with the help of a WebLogic Foreign Server ) and how to push messages to JBoss AS ( with the (more...)

Installing SSL enabled APEX 4.1 with development environment and APEX Listener on Weblogic and standalone


This article presents a way to set SSL enabled APEX 4.1 on weblogic using APEX listener. The final part shows the process to configure standalone APEX listener and the use of Grizzly in it.
This post is divided in 4 sections

Silenced writeback using webservices – part 2


Happy Valentine's day to all :)

This is the 2nd part of the series in which I am using webservies to writeback. In my previous article, I showed a mechanism to do writeback using a utility of OC4J. That mechanism works well with OC4J and OAS (Oracle Application Server) (more...)

BIP11g Users and Roles

Did some work on a 11g BI publisher only install recently. Opposite to OBIEE11g you can still add users directly into BIP. Be sure to give them the right roles and sync it with your weblogic security realm.

Till Next Time

java.lang.NegativeArraySizeException

On starting weblogic on Solaris 10, I got this error

Could not load the performance pack that can take advantage of /dev/(e)poll device due to:
java.lang.NegativeArraySizeException.

I checked ulimit:

ulimit -n
65536

I reduced ulimit to 65534:

ulimit -n 65534

and weblogic started up fine.

I remember reading somewhere that java has array overflow issues if ulimit is set to maximum.

WebLogic 12c: For Admins and Java-heads, Not for Me (Yet)

Oracle lists more than 200 new features in WebLogic 12c – unfortunately, I don’t get to use them.

The improvements fall in two main categories:

  • Management, Performance and High Availability (HA)
  • Java EE 6

As a developer, management and high availability is “somebody else’s problem” – I appreciate the work (more...)