Sunday, June 10, 2018

Creating Weblogic Domain for Weblogic Server

After the installationof weblogic server, next step is to create a new weblogic domain. If you have installed weblogic server with examples, there will be a domain already configured during the installation and an application deployed. For the creation of other domain(s), you may follow the steps explained in this article.

Sunday, June 3, 2018

Installing Weblogic Server 12.2 on Linux 6 Linux 7 and Windows

If you want to install full Fusion Middleware, this article will help you, otherwise keep reading this article if you wish to install weblogic server only. In this article I will explain how to install Weblogic and Coherence that is used to deploy Java applications. I did this installation on Linux, but same steps can be followed to install the weblogic server on Windows platform.

Saturday, May 26, 2018

Starting and Stopping Weblogic Server

After you have created a weblogic domain for Fusion Middleware, or a weblogic domain for Weblogc Server, next step is to start the weblogic components that include node manager, administration server and managed server.

Starting Node Manager

First we start the node manager. Use following method to start the node manager. For this example, $DOMAIN_HOME is pointing to /home/oracle/config/domains

Wednesday, May 23, 2018

Creating Weblogic Domain for Fusion Middleware

After we have installed the Fusion Middleware and completed its initial configuration, next step is to configure a weblogic domain. A weblogic domain is a logically related group of weblogic resources. Once we create a domain, and Administration Server instance is also gets created that is used to manage this domain. After this, we can add Managed Servers using this Administration Server by logging into the Administration Server using an admin user account through a console. Web Applications are then deployed on to the managed server(s). We can create multiple managed servers to work as a cluster for load balancing and fault tolerance

Friday, May 11, 2018

Initial Configuration of Fusion Middleware after the Installation

After completing Fusion Middleware installation installation, next step is initial configuration of the it. If you have done Fusion Middleware Installation, you would need to configure certain schemas (this is not needed for Weblogic and Coherence installation using generic installer) before you can create domains and start using Fusion Middleware. Click here for the official documentation.
Following are the schemas that need to be created

Monday, May 7, 2018

ORA-02095: specified initialization parameter cannot be modified


This is a generic error message that may be returned while setting an initialization parameter. There are a few other error messages that we may face and in this article, I would discuss those error messages as well. The most common reason of this error message is modifying a parameter using ALTER SYSTEM command that is not dynamically modifiable. In this case, we need to set the parameter in spfile, or pfile, and then a re-bounce of the instance would set the value of this parameter in the instance.

Tuesday, May 1, 2018

Installing Oracle Fusion Middleware 12.2 on Linux 6, Linux 7 and Windows

Oracle Fusion Middleware contains many products, tools, and services, and provides facility of using Java EE and developer tools, integration services, identity services, business intelligence and several other Oracle products.
In this article I would demonstrate how to install Oracle Fusion Middleware 12.2 (I am using 12.2.1.2.0 for this article) on Linux 6 and Linux 7. Following is the official document that I used while writing this article.

Monday, April 23, 2018

ORA-01013: user requested cancel of current operation


If ORA-01013 appears in the alert log file, it would mean that your application is closing a session forcefully and database records this as action canceled by the user/application (as name description of this error suggests). It would mean that most of the time it is not something that can be handled from the database side to stop this message from appearing in the alert log file. But, sometimes this error may be because Oracle internally kills some process that crosses a timeline already defined. In the following I would provide further detail of this.

Tuesday, April 17, 2018

Error 12154 received logging on to the standby

There are several error messages related to dataguard environment and many of them have been discussed in my blog, and you can find links to those articles at the bottom of this article. In this article, I will explain Error 12154 that I received in one of my dataguard environments. This error message may appear in the alert log file of your primary database and it would seem similar to the following.
Error 12154 received logging on to the standby
FAL[client, USER]: Error 12154 connecting to <FAL_SERVER> for fetching gap sequence

Friday, April 13, 2018

Error 1033 received logging on to the standby



Troubleshooting a dataguard environment is not very straightforward sometimes. If you come to know that physical standby database is out of sync with the primary database, first thing is to check the alert log files of primary and standby database to find out any error messages that might be appearing in the alert log files. For example, if error 1003 is reported in the alert log file, you may see entries similar to the following in the primary database’s alert log file.
Mon Feb 06 00:10:40 2017
Error 1033 received logging on to the standby
PING[ARC1]: Heartbeat failed to connect to standby 'MY_STANDBY_DB'. Error is 1033.

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