Ahmed Aboulnaga - Chronicles of Technology

Web server returning 'Cross-Origin Request Blocked' to browser

With a typical web service call made, the browser debugger is showing a Cross-Origin Request Blocked error because it Did not find method in CORS header, specifically Access-Control-Allow-Methods. The resolution to this is quite simple with Oracle HTTP Server (OHS) 12c. Browser Error: "Did

Bash

How to show a timestamp in Bash history

By default, when you run the history command, it lists the history of all commands previously executed, but it does not include a timestamp. Adding a timestamp to the bash history can easily be accomplished with the HISTTIMEFORMAT Bash variable as shown. export HISTTIMEFORMAT=

UMS

Sending test UMS notification fails due to missing JMS queue

I recently ran into a problem sending test email notifications from the Human Workflow Engine in Oracle SOA Suite 12.2. In the EM Console, if you navigate to SOA > soa-infra (soa_server1) > Service Engines > Human Workflow > Notification Management, you

Oracle HTTP Server

Getting HTTP-403 connecting to OHS using CORS

We had a vanilla installation of Oracle HTTP Server (OHS) 12.1.3 and configured it to support CORS. On a new installation of OHS 12.2.1, the same

OBIEE

Repeated DFW-99998 errors in OBIEE 12c? Some of them you can ignore

On OBIEE 12.2.1.1.0, you may get repeated DFW-99998 errors, such as: <Feb 20, 2020, 3:22:08,281 PM EST> <Emergency> <oracle.dfw.incident> <BEA-000000> <incident 9116 created with problem key

Oracle SOA Suite

URLs for Oracle SOA, BPM, OSB, BAM, WSM, ESS, MFT, and API consoles

Just a quick reference to most console URLs typically available on the following products: Oracle WebLogic ServerOracle SOA SuiteOracle Business Process Manager (BPM) SuiteOracle Service Bus (OSB)Oracle Business Activity

WebLogic

Quickest way to decrypt passwords in Oracle WebLogic Server 12c

There are lots of scripts online that show you how to decrypt WebLogic passwords. Some work on different versions of the product but not others. Here's the simplest, most straightforward approach to decrypting passwords in Oracle WebLogic Server 12c. This has been tested on

ESS

Unable to create an error notification rule in Oracle SOA Suite 12.2.1? Patch 26088894 is not the fix

On Oracle SOA Suite 12.2.1.0.0, when we tried to create an error notification rule to alert on failed ESS scheduled jobs, we experienced an issue where the dropdown was not showing any schedules. Unfortunately, the solution to apply patch 26088894

WebLogic

Filtering WebLogic log messages

There is a ton of documentation online on how to create WebLogic log filters. In this blog post, I describe how to easily filter out a repeating error that appears to be harmless. What harm is there keeping these entries in the log file?

WebLogic

blowfish-cbc is not supported in FtpAdapter? Not true

We added a new JNDI to the FtpAdapter in Oracle SOA Suite 12.2.1.0.0, and upon execution of the SOA composite, received the error "blowfish-cbc is not supported". Blowfish is a cipher, and this generally should be configured within the adapter

Advanced find/replace commands in Linux

Below are some random find/replace examples that I've used in the past with a brief explanation of each. Example 1 - Recursively find a string Recursively search through all

Coherence

Get Oracle Coherence version

Many Oracle Fusion Middleware products are bundled with Oracle Coherence, either optionally or required by the product you are installing. Often it is necessary to identify the Coherence version. These are the commands to extract the Coherence version from coherence.jar: cp $DOMAIN_HOME/

WebLogic

Deployment exception because operation cannot be performed until the WebLogic server is restarted

Problem: I tried to create a datasource on Oracle WebLogic 12.1.3, but encountered the following error on the WebLogic Admin Console: The full error stack in AdminServer.log: ####<Sep 26, 2019 10:25:07 AM MDT> <Error> <

OSB

Getting "Hostname verification failed" in OSB 12c

Problem: When calling a service on Oracle Service Bus (OSB) 12c, I received an SSLKeyException related to hostname verification even though we do not have SSL configured. The entire error stack in osb_server1.out is: [2019-09-24T21:58:33.853-06:00] [osb_server1] [ERROR]

Cloud

Article: Compute Cloud Performance Showdown

My article titled Compute Cloud Performance Showdown was just published in the latest issue of UKOUG PTK. PTK, which stands for Pass The Knowledge, was formerly Oracle Scene, and is

WebLogic

Force shutdown in stopWebLogic.sh

The WebLogic stop scripts stopWebLogic.sh and stopManagedWebLogic.sh do not "force" a shutdown when being called. This means that you could be waiting indefinitely until all transactions are completed. It is probably best to configure these scripts to force=true. This only takes

OEM

Changing the WebLogic password on OEM Agents

This post describes the steps needing to be done on the OEM Agent if the WebLogic password used to connect has been changed. It needs only be changed once per domain. This same set of instructions can be used if you decide to use

Oracle SOA Suite

Getting continuous "MBean attribute access denied" in SOA logs due to OEM Agent

Recently, we started getting continuous errors every few seconds in our Oracle SOA Suite logs (specifically in the SOA managed server standard out log). The entire exception is shown here: <Sep 11, 2019 9:27:41 PM EDT> <Error> <

WebLogic

WebLogic AdminServer startup hanging at "Initializing self-tuning thread pool"

Starting up the AdminServer on Oracle WebLogic Server 11g hung indefinitely at the log entry "Initializing self-tuning thread pool". There was planned maintenance on the network, so we suspect it may (or may not) have been related to that. This is the snippet from

OEM

Customizing Oracle Enterprise Manager 12c/13c email notifications

The email alerts generated from Oracle Enterprise Manager Cloud Control are not the most appealing visually, with formatting not easy on the eyes and includes a slew of unnecessary information and clutter. To customize email notification in OEM Cloud Control 12c/13c, login as

JDeveloper

Unresolved IOException when starting up Oracle JDeveloper 12c

Sadly, a recently successful installation of Oracle JDeveloper 12c (12.2.1.3) failed to start up on a desktop virtual machine with the following error being returned: java.version=1.8.0_152 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_

RDA

Running RDA for Oracle Fusion Middleware 12c

Never ran an RDA (Remote Diagnostic Agent) before? It is a way to collect comprehensive diagnostic information to provide to Oracle Support. Some Oracle Fusion Middleware installations already have RDA

OEM

Inspect 'em_prereqs_results.xml' for OEM Agent installation errors

In rare cases, the Oracle Enterprise Manager Cloud Control Agent may fail during the installation, and the cause of the installation failure can be found in any of the .err, .log, or .out files. In one particular instance, the installation of an OEM Agent

Oracle SOA Suite

Custom .bash_profile for Oracle Fusion Middleware

I have created some crude custom .bash_profile scripts that I use to make things easy for me after I install some of the various Oracle Fusion Middleware products. Oracle HTTP Server (OHS) 12c export PS1="\u@\h:\$PWD> " export DISPLAY=:1 export MW_

OpenShift

Red Hat OpenShift Overview

OpenShift is a family of containerization software developed by Red Hat and has been around since 2011. However, it has recently gained more steam over the past couple of years.