Problem in running instance of oc4j

Hi
i am using Jdeveloper 10g for developing J2EE application. In order to debug my JSP code, I wanted to start the OC4J instance. For that i went to <JDEV_HOME>\j2ee\home and ran "java -jar oc4j.jar" command in the command prompt.The server started, but when i tried to test OC4J by accessing http://localhost:8888 i get following error.
ERROR
The requested URL could not be retrieved
While trying to retrieve the URL: http://localhost:8888/
The following error was encountered:
Connection Failed
The system returned:
(111) Connection refusedThe remote host or network may be down. Please try the request again.
Your cache administrator is webmaster.
Generated Tue, 13 Jun 2006 13:08:52 GMT by box.inatech.com (squid/2.5.STABLE6)
Pls can any one help me to find a amicable solution for this problem.
Thanks well in advance.
Shrikant

Hi Shrikant,
Not too sure but ths OC4J you are talking about is the embedded OC4J right? Or did you download it separately? Because the embedded OC4J has a bunch of features missing from the regular OC4J. I know in the regular OC4J if you start it up and type in the URL address you can access the admin console and so on, not so sure about the embedded. The embedded AFAIK is just for quick testing and deploying of applications. I dont even think you can deploy web services in the embedded OC4J even.
Hope that helps.

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Hi all,
I have problem on running preconfigured oc4j server in JDeveloper 10.1.3.2. I get the error message below :
C:\Jdev10132\jdev\extensions\oracle.adfp.seededoc4j.10.1.3.2.0\srcimage\bin>
C:\Jdev10132\jdev\extensions\oracle.adfp.seededoc4j.10.1.3.2.0\srcimage\bin\adfp_oc4j.cmd C:\Jdev10132\jdk\jre\.. C:\Jdev10132\ C:\Jdev10132\jdev\extensions\oracle.adfp.seededoc4j.10.1.3.2.0 -start
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System can not find the specified path
Error: Can not find C:\Jdev10132\jdev\extensions\oracle.adfp.seededoc4j.10.1.3.2.0\j2ee\home\config\server.xml.
Stop OC4J command finished
Any help is appreciated...
Thanks in advance
Aliye

well I have downloaded the latest version of jdk (1.6) to check with it so it solved some of the problems but still I get an error on running the oc4j server. Error I get is:
Starting OC4J from C:\Jdev10132\j2ee\home ...
Executing: C:\Jdev10132\jdk\jre..\bin\java -XX:MaxPermSize=128m -Xmx512m -jar "C:\Jdev10132\j2ee\home\oc4j.jar" -config C:\Jdev10132\jdev\extensions\oracle.adfp.seededoc4j.10.1.3.2.0\srcimage\j2ee\home\config\server.xml
07/02/19 10:45:10 Error initializing server: IO error reading system
07/02/19 10:45:10 Fatal error: server exiting
Stop OC4J command finished.
I couldnt understand what is the problem now..
Thanks for your help..
Aliye

How do I create a second instance of oc4j in a standalone enviroment

I am using OC4J standalone to deploy a sparql endpoint using jena, joseki, and the oracle jena adaptor. OC4J is running on the same server as my DEV and QAR databases. The current instance of OC4J is using a data source called "OracleSemDS" to connect to my DEV database. We are now ready to migrate the endpoint to QAR. As I was setting up the QAR endpoint, I discovered the the jena/joseki tools are hard-coded to use the "OracleSemDS" data source. Therefore, I cannot have 2 endpoints running in the same OC4J instance where one points to DEV and the other points to QAR.
Therefore, I need to create a second instance of OC4J that specifies QAR as the "OracleSemDS" data connection. Can someone tell me how to do that?
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Phil

jphilb wrote:
I am using OC4J standalone to deploy a sparql endpoint using jena, joseki, and the oracle jena adaptor. OC4J is running on the same server as my DEV and QAR databases. The current instance of OC4J is using a data source called "OracleSemDS" to connect to my DEV database. We are now ready to migrate the endpoint to QAR. As I was setting up the QAR endpoint, I discovered the the jena/joseki tools are hard-coded to use the "OracleSemDS" data source. Therefore, I cannot have 2 endpoints running in the same OC4J instance where one points to DEV and the other points to QAR.
Therefore, I need to create a second instance of OC4J that specifies QAR as the "OracleSemDS" data connection. Can someone tell me how to do that?
Thanks,
Philgday Phil -- Melli Annamalai from the Oracle Server PM team pointed me to your question. I was an OC4J Product Manager before we bought out BEA and I swapped over to WLS -- so I have some information below that hopefully is of assistance to you.
Since you are using OC4J standalone, the simplest way to get a second instance, is to just clone the existing, whole directory structure of your working OC4J instance into another directory, and configure/run it from that directory. To map the OracleSemDS to another target (QAR) you change the data-sources.xml file in the second instance. If you want to run them concurrently on the same server, you'll need to change the ports in the second instance so they have unique values: default-web-site.xml, rmi.xml, internal-settings.xml, jms.xml. These additional ports can be specified on the command line as a Java property string, albeit this is not a documented nor supported feature. See http://buttso.blogspot.com/2007/02/specifying-oc4j-standalone-ports-from.html for more information.
Now as an example, assuming you have your OC4J you want to clone in the dev directory, and now want to create a second instance of OC4J in qar, I'd do this:
cp -rp dev/* qar
cd qar/j2ee/home/config
vi data-sources.xml
(edit any other files if needed to alter ports) ...
cd ..
java -jar oc4j.jar That should work, and should create the second instance using the current configuration (ie dev) as its basis (including deployed apps). Of course, you'll need to manage them independently from here as they really are just two separate OC4J standalone instances.
Now what else you could potentially do is to create a secondary configuration file subset only which only changes the necessary files to support running the second instance. In this case, you'd make a copy of the j2ee/home/config/server.xml, j2ee/home/config/application.xml and j2ee/home/config/data-sources.xml files, renaming them to qar-server.xml, qar-application.xml and qar-data-sources.xml.
Then do the following:
1. In qar-server.xml file, you'd change the global-application application to point at qar-application.xml instead of application.xml:
<global-application name="default" path="qar-application.xml" parent="system" start="true" />
2. Change qar-application.xml so that it used the qar-data-sources.xml file:
<data-sources path="qar-data-sources.xml" />
3. Change qar-data-sources.xml file so it points to the qar database target.
4. Start OC4J, telling it to use qar-server.xml instead of the default server.xml
D:\java\oc4j-10135-prod\j2ee\home>java -jar oc4j.jar -config config/qar-server.xmlI think you could run into some concurrency problems if you try and run the two instances simulataneously, but in general it should be OK I think if you run them separately.
Another solution here is look at how the application specifies/uses datasources. The hard coding of the data-source name into the applicaiton via a direct JNDI lookup works, but restricts the flexibility you as a deployer/administrator has.
If the application used the Java EE resource-ref approach to look up and use the datasource, then the actual JNDI name of the datasource the application uses it totally abstracted from the actual physical name of the datasource that is created on the container -- so you'd have DEVDS and QARDS as physical datasources configured and running on OC4J -- and what happens is that as you deploy the application, you essentially map its lookup and use of OracleSemDS (which would need to change to a java:env/ namespace) to the physical datasource you want it to use (DEVDS or QARDS for example). You can easily alter this post deployment by changing the generated orion-application.xml file to point at the alternate physical datasource. Following that, you can also create separate deployment plans which map the app to the different datasources, then feed this in with the deployment operation so that the correct mapping to either DEVDS or QARDS is done during the deployment process.
I don't know what scope you have to change the application so the above may not be possible -- you'd need to change the lookup code so that it uses the Java EE reference model and change the meta-inf/application.xml to add the corresponding resource-ref entry which declares the logical datasource name that needs to be mapped on deployment.
Another approach here may be to use an application embedded datasource, where you put a data-sources.xml file into the application archive itself (along with an orion-application.xml file which references it) whereupon at deployment time, a datasource specific to the application will be created. In this manner, you'd have say two copies of the same application to deploy (DEV, QAR) which contain different data-sources.xml file. From memory, each application will have its own JNDI namespace so their datasources can co-exist with the same names, with application level data-sources overriding server level ones. Since you'll most likely want to keep the same context-root for the web modules (which has to be unique per server) you'll generally need to run just one of the applications at a time. I'd do this like this: deploy one, stop it, deploy the other, stop it, then start only the one you need to test. In that way, you'll have one copy of the application running (either DEV or QAR) and one datasource definition running within it.
Here's some documentation links to get you going:
Managing Application Lifecycle (start, stop): http://download.oracle.com/docs/cd/E14101_01/doc.1013/e13978/adminclient.htm#BABHJAFE <-- describes admin_client.jar but general principles apply to ascontrol management of application.
Packaging and Testing Applications: http://download.oracle.com/docs/cd/E14101_01/doc.1013/e13979/packag.htm#BHCFBEEC
Application Level DataSources: http://download.oracle.com/docs/cd/E14101_01/doc.1013/e13975/datasrc.htm#CHDIBFHG
Using Deployment Plans: http://download.oracle.com/docs/cd/E14101_01/doc.1013/e13980/deployplan.htm#CHDFEFAE
cheers
-steve-

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I've successfully installed two instances of OC4J 10g (10.1.3.0.0) on a single server and am able to run with two differently named JDK 5.0 installs.
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Article-ID: <Note:215469.1>
Circulation: PUBLISHED (EXTERNAL)
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import java.io.IOException;
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import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
public class Servlet1 extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=windows-1252";
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super.init(config);
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"); out.println("</body></html>");
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---------------------------------+--------------------+---------+----------+------------+----------+-----------+------
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Mulitple instances of OC4j

hi all,
I am using oc4j standalone for development. Is it poosible to run multiple instances of oc4j on the same jvm? If so please guide me... Also could i deploy two applications with different contexts in the seperate instances?
Thanks in advance

Hello,
First of all you can not have multiple OC4J instances in 1 single JVM, but you can configure your application to use multiple instances of OC4J -each one running in its own VM-; and you do this for scalability and load balancing.
When you have multiple JVM, and you are running a stateful application (EJB and/or Servlet sessions) you have to configure your OC4J instances to replicate the session information in the different nodes (this is where in the context of OracleAS -not stand-alone OC4J- we are talking about "islands")
So to comment Stefano answer, yes you can have your application deployed to multiple OC4J instances, and if configure correctly it will appear like 'one single' application; but as I said before each instance is running in its own JVM.
Niranjan, I would like to understand better why do you wan to use multiple instances? This will help us to answer you question...
Regards
Tugdual Grall

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