Ahmed Aboulnaga - Chronicles of Technology

Regenerating the 'DemoIdentity' certificate in WebLogic 12c

I recently encountered an Oracle WebLogic 12c environment that was installed 5 years ago, and whoever set it up at the time settled on using the included demo certificate created with the installation. Unfortunately, this demo cert expires after 5 years and now they

WebLogic

WebLogic managed server RUNNING but with 'Failed' health

On Oracle SOA Suite 12c (and technically Oracle WebLogic Server 12c), I noticed that a couple of managed servers were in a RUNNING state but the health was reporting Failed. What could cause this particular scenario? In this domain, the TLOGs were persisted in

BPEL

Getting "Element 'binding.rest' not expected" in BPEL

I created a BPEL process and attempted to add the property oracle.webservices.http.headers to my reference as shown below. However, during compilation, I received the following error: Error(39,100): schema - (Error) Element 'binding.rest' not expected. SolutionMove the <binding.

SQL*Plus

Getting `ORA-00933: SQL command not properly ended` due to blank line

What's strange is that a SQL script someone wrote (which apparently was running fine for months) seemed to return an ORA-00933: SQL command not properly ended error when executed through the Linux command line, as shown below: oracle@dbhost:/home/oracle> /u01/sqlplus/instantclient_

BPEL

Don't let the '&' confuse you when viewing Oracle SOA instances on a web browser

Man... dealing with & (ampersands) in SOA, web services, XML, and REST sucks. Dealing with special characters in general sucks-having to figure out if the product or tool is escaping/encoding them for you or not. Recently, I had to update my BPEL process

JDeveloper

Working around messy REST references using WSDL interfaces in JDeveloper

I recently ran into multiple issues with Oracle JDeveloper 12.2.1.4 when trying to call external REST web services from a BPEL project. It was quite painful and

JDeveloper

Getting java.lang.NoClassDefFoundError in JDeveloper Native Format Builder for JSON

Apparently I've run into an issue with Oracle JDeveloper 12.2.1.4.0 when using the Native Format Builder against a JSON file. Other online posts point to Oracle

Documentation

My template for technical installation documents

As a technical administrator, I often recommend creating high quality document deliverables. In a typical installation document, I am adamant about including certain sections which I normally don't seen many

Linux

Checking Linux host performance (for the newbie)

Every time I interview someone (for a non-Unix admin position) and ask them how they would check for performance on Linux, I'd like to say that the only answer I

Oracle SOA Suite

Getting "Cannot find reference" in BPEL instance

When executing a BPEL process, the instance faulted with the following exception: java.lang.RuntimeException: Cannot find reference or service named 'Touch' in composite.xml when invoking the partnerLink Touch from BPEL component 'ProcessBPEL'. Here's the same error on the console: Basically, I had

Oracle SOA Suite

Updating SOA Polling Frequency through WLST

Have you ever wondered how you can update the PollingFrequency of an inbound adapter such as the FileAdapter or FtpAdapter using WLST? Taking a look at an Oracle SOA 12c composite in the EM console, when you click on your service, you can navigate

JDeveloper

Passing parameters to a REST URI in BPEL/SOA 12c

In this blog post, I describe how, during the development of an Oracle SOA Suite 12c composite, to pass URL parameters when invoking an external REST service. In this example, my SOA composite has 2 separate external references. These are both REST services using

Oracle SOA Suite

Add WSM policy to authenticate using BasicAuth when calling an external reference in SOA 12c

If you're developing a composite in Oracle SOA Suite 12c (12.2.1.3+), you may need to call an external reference using the SOAP or REST adapters. If these external services require HTTP Basic Authentication (BA), then you will need to attach an

IOUG

IOUG Member Spotlight (Dec 2015)

I happen to randomly stumble upon this today when I was searching for an old blog post, so figured it might be interesting to share. This was when I was

OEM

Adding a new WebLogic Domain target to OEM

Adding an Oracle Fusion Middleware/WebLogic Domain target to OEM is not that difficult, albeit must be done manually. Simply navigate to the gear icon, then Add Target > Add Targets Manually. Click on Add Using Guided Process. Now select Oracle Fusion Middleware/WebLogic

OEM

Removing a WebLogic Domain from OEM Cloud Control

When you add a WebLogic Domain target to OEM, it automatically adds a number of target types included in this domain such as Application Deployments, Oracle WebLogic Server, Oracle Coherence Cache, Email Driver, and so on. It's not unusual to have hundreds of targets

OEM

Checking the 2-way communication between OMS and OEM Agent

The Oracle Enterprise Manager (OEM) Cloud Control Agent is installed on each host in your environment. This can be a Linux, Windows, or Solaris host, and typically (though not necessarily) there is 1 agent installed per host. The OEM Agent listens on a default

SSH

Getting ssh_init when using SSH or SCP

When using pscp to transfer a file, you may receive the error: ssh_init: Network error: Cannot assign requested addressThe solution is simple. Simply specify the -P 22 parameter to explicitly connect to the port, and you should be good to go.

SSL

Getting DN mismatch in Java? Use keytool

I wrote some Java code that connects to a secure Oracle Database listener port through JDBC. The code I used is published here. However, every time I execute this code, I receive the following exception: java.sql.SQLRecoverableException: IO Error: Mismatch with the server

Oracle SOA Suite

When is the Oracle SOA Platform ready to accept requests?

If you've started up your Oracle SOA Suite 12c managed servers, and even after the managed server is reporting RUNNING and OK, this doesn't mean that the SOA platform is completely up yet. WebLogic reporting the state of the managed serversEven after the managed

Recovering from a corrupted Embedded LDAP in WebLogic 12c

A customer experienced an issue in Oracle WebLogic 12c in which their Global Roles suddenly disappeared. Not having seen this exact issue before, I did however experience issues in the past where the Embedded LDAP was corrupted. Per Oracle Doc ID 1192253.1, Oracle

Enable 'configuration archive' in WebLogic

When you enable configuration archive in your Oracle WebLogic Server domain, the entire domain configuration is backed up at every server restart. This is pretty much a must-have setting for every domain. There are absolutely no disadvantages in enabling this, and can come in

Linux

Why does Linux report 100% memory usage all the time?

Why does Linux report memory usage as being 99% used even though nothing is running on the server? I'll start with the conclusion: If little swap is being used, then

Keycloak

Install and Startup Keycloak

Keycloak is an open source software product (Apache License 2.0) identity and access management solution. This post walks you through an extremely quick setup of this product. Download KeycloakDownload

SSH

Login to Linux using SSH Keys in PuTTY

This post provides a quick guide to configuring access to a Linux account using SSH keys. Generate a Private and Public Key PairDownload puttygen.exe from here.Click Generate.Move