Websphere Application Server 5.1 Hangs when using Oracle Connection Pool

I have a j2ee application that runs on WAS 5.1 ( IBM JDK 1.4 ) and Oracle 10g 10.2.0 . My customer is doing load testing with 25 virtual users and a connection pool with a max size of 10. When the test starts all 25 users attempt to get a connection, and the first 10 get a connection. At this point the application server hangs with the connection pool in allocation. This is seen in Tivoli. Each thread only needs one connection to process it's request.
I have my own home grown connection pool which when used under this load does not experience and issue. Monitoring from Oracle's admin console I see a max of 10 sessions. The home grows connection pool does not use a WAS DataSource.
I have configured my application to use DB2 with a WAS DataSource and the application server does not hang. Monitoring using Tivoli shows the connection pool going into allocation, but it recovers as is expected.
Are there any known issues with the Oracle JDBC drivers when used with WAS 5.1 DataSources?
Any direction would be helpful, as I currently thing there is an issue with Oracle's Connection Pool and the IBM JVM.
Thanks,
J

just an attention call: OracleDatasource connection pool does not accept parameters such as removeAbandoned, minEvictableIdleTimeMillis, timeBetweenEvictionRunsMillis, etc, these are specific for the tomcat dbcp implementation (http://tomcat.apache.org/tomcat-6.0-doc/jndi-resources-howto.html#JDBC_Data_Sources).
For the accepted ones read this http://download.oracle.com/docs/cd/B28359_01/java.111/b31224/concache.htm
Edited by: user7428636 on 24/Jan/2011 6:22

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"VM Periodic Task Thread" prio=10 tid=0x008B3390 nid=0x8bc waiting on condition
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When I place a JSP in the above path, it works fine (http://localhost/webapp/examples/xyz.jsp in the browser).
Question:
Where is webapp (as it appears in the URL) defined?
Then, I go on to create new directories as follows
C:\WebServer\AppServer\hosts\default_host\MyApps
C:\WebServer\AppServer\hosts\default_host\MyApps\web
Place a working JSP in C:\WebServer\AppServer\hosts\default_host\MyApps\web. And when I enter http://localhost/webapp/MyApps/xyz.jsp or http://localhost/MyApps/xyz.jsp in the browser, the JSP can't be located.
What is required to be done (from mapping point of view) and where? Does anything pertaining to JSP need to be defined on the HTTP Web Server (not for JSP's I think). Where should I put the JSP file so that everything for the application could be grouped together and it will work as well.
I have gone through other postings on this issue on this forum but they have been of little help.
Any thoughts on how to get this working.
Thanks

I use IBM Visual Age 3.5 & 4 which contains a scaled down vesion of Websphere for running servlet and JSPs. I am very familiar with the intricacies of running web apps in in this scaled down environment. What I'm about to tell you may or may not apply to WAS but it should help you.
You can't simply add a directory under default_hosts and expect a new web app to appear. Websphere only recognizes web apps that are set up properly in the servlet_engine file. Each server has it on servlet_engine file located in the properties directory. For the default server, the file is named default.servlet_engine. In that file you must add a new <webspher-webgroup> element as a child element to <websphere-servelet-host name="default_host">. I added a web app to my server and it looks like this.
<websphere-webgroup name="second_app">
       <description>The second app</description>
       <document-root>$approot$/web</document-root>
       <classpath>$approot$/servlets$psep$$server_root$/servlets</classpath>
       <root-uri>/</root-uri>
       <auto-reload enabled="true" polling-interval="3000"/>
       <shared-context>false</shared-context>
</websphere-webgroup>I can't remember if it automatically creates the directory structure for you now or not, but at any rate, this web app will be stored in c:\WebServer\AppServer\hosts\default_host\second_app with the enclosed web direrectory as your location for JSPs.
One more thing to mention. For every web-app you create, there is a descriptor file similiar to the web.xml deployment descriptor you see in /WEB-INF for the servlet 2.2+ spec. In my case the file is name second_app/servlets/second_app.web_app. In the descriptor you would probably want to configure some settings specific to your web app such as servet registration, init parameters and which version of the jsp compiler to use.
Since IBM came out with WAS 3.5 before the Servlet 2.2 spec went mainstream for Servlet Containers, WAS's configuration is quite unconventional. But, I found that the documentation that comes with WAS explained all these configuration quirks quite well.
Hope this helps
Steve

Developer Server 6.0 hanging when launched from Netscape 4.6

Hi, simple question to ask about OAS and Developer Server.
My Developer Server 6.0 hanging when launched from Netscape 4.61,
I am currently running...
Pentium PII 200Mz running NT sp5
Forms Server version 6.0.5.31.0 (Patch 3 applied)
OAS version 4.0.7.1.0 (Patch applied)
Jinitiator 1.1.7.18
Netscape 4.61 browser
I have all the latest versions of everything that is available,
I have followed the instructions.
I successfully connect to the OAS admin utility and have setup
all the virtual to physical directory mappings under the default
listener www. I successfully start all website OAS services.
I have Forms server successfully started up as a process
listening on port 9000.
I have two statics html files created:
a) with Jinititator 1.1.7.18
The very first time I connected to this static html file it
installed Jinitiator as expected. The Forms server splashscreen
then appears.
Jinitiator then starts up successfully, no errors appear in the
Java console. This has proved I am talking to the listener and
my virtual directory mappings are working.
At this point there is a lot of disk activity and then all
stops, the splashscreen remains and appears in the discussion
area:
FRM-9999 cannot access "koala.ilaco.gov.bo:9000" and
a series of java exceptions
I am pointing to the correct java directories (I think)
b) with out Jinitiator
When I try to call using URL with Netscape 4.61 I get a
message on the status bar saying...
Applet oracle.forms.engine.Main class oracle/forms/engine/Main
got a security violation: Method verification error
Can you help ?
If you know the answer, please let me know as soon as
posible.
Thanks for the answer....
Rgds,
Polo
null

Bart LEBOEUF (guest) wrote:
: Hi,
: I've the same problem during this week. I've resolve the
: problem by replace DLL's
: in %ORACLE_HOME%\bin by the ifwcm60.dll from Developer CD-Rom
: (\extras\sp4\ifwcm60.dll) and vgs60.dll
(\extras\vgs\vgs60.dll).
: At first time, it doesn't work. I remove my environnement
: variables
: FORMS60_MAPPING and FORMS60_TIMEOUT from my System Control in
the
: Config panel, then I reboot and surprise, it works !!!
: (Look also in database registry of Windows with regedit
utility
: in
: [HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE] and remove the two
: variables if you found them.)
: I try on my two servers and it worked now perfectly.
: : Bart.
I respond your email, with my actual server configuration my
problem is now: I get the splash screen and after form is hanged.
My server configuration is:
Compaq PC, with Pentium II, the software is:
- Windows NT, with Service Pack 5
- Oracle Application Server, v.4.0.7.1.0 Enterprice Edition,
pathset 1
- Developer Server v.6 patchset 3
- My browser in this machine is Netscape 4.61
- Jinitiator 1.1.7.18 is also used.
My developer server is installed and running on the same machine
that OAS is. I am using other browser in other machine (IE5)
and trying to connect to the OAS on the first machine.
My problems begin when I launch ifsrv60.exe. I copied
ifwcm60.dll v.6.0.5.0.2, and other files required in the %
ORACLE_HOME%\bin
I forced listener Developer Server Port (
c:\orant\bin\ifsrv60.exe -listen port=9000 )
Now, I can connect with this process, with the following line:
telnet koala 9000. The listener is working now.
I tried to work with my (NonCartride-static html)forms60 form on
WEB without Jinitiator, but I couldn't.
With Netscape, in the status bar: Applet
oracle.forms.engine.Main can3t stop ERROR
With IE5, I get the splash screen and after the forms is hanged.
If I use Jinitiator:
With Netscape, in the status bar: Oracle Jinitiato: applet
oracle.forms.engine.Main inited then form is hanged.
With IE5, I get the splash screen and after that, the screen
freezes and looks like the form is hanged.
Any further suggestions on this?
Polo
null

Websphere Application Server 5.1 Hangs when using Oracle Connection Pool

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