How do I invalidate the cache in the JCos on EP Portal.

hi michael,
for NW7.3+ environmnet this can be done via the netweaver administrator ( http://host:port/nwa).
you can find the function under "Availablity and Performance" - "Resource Monitoring" - "JCo Monitoring" - "Metadata Cache". there you have the possibility to clear the cache for an abap application server and/or a special structure from it.
regards,
christian

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How to clear the cache in the portal browser

Hello Experts,
Iam unable to clear the cache in the portal. I tried clearing the Navigation cache , PRT cache,PCD cache,Database cache,UME cache.
The senario is in the browser if iam logging with some user X , he should see only 1,2,3 countries, and if i logg off and again logg in the same browser with different user he is seeing same 1,2,3 countries unlike he should see 4,5 countries.
But if iam opening in different browser iam getting the correct one with cache cleared.
I want to acheive this in the same browser.
Qucik help in solving out this cache problem is appreciable.
Regrds,
Manasa.

There is one more important cache: the HTTP Provider Service cache (in VA).
To find out why the browser is showing the same languages, analyze what the server is sending to the browser with HTTPWatch or Firebug and look at the cache flag. Also check what is the iView cache parameter? Is it user, session, shared or none?
How do you do the logoff? The best thing is to make sure that the HTTP Session is killed. If not, the portal may send data that is cached for the HTTP Session to the browser. When you open a new browser, you will also open a new HTTP Session. That could be the cause why it is working with a new browser instance.
br,
Tobias

How to flush the cache of a JCO repository ?

Does anybody now how to flush the cache of the JCO repositories of pools managed by Netweaver application server without restarting the JVM ?
The reason I'm asking is that, whenever a tables or structure changes on ABAP side (CRM, IS-U, R/3), even though we redeploy the J2EE applications, they do not see the new definitions, and we have to restart the JVMs.
This is particularily annoying in an "high availability" production environment such a ours.
We need a close to 24/7 up time, and putting down the JVM for even a few minutes is becoming a problem.
I'd like to be able to manually flush the repositories when needed.
For example, is it possible to write a small java application that could perform the flush on a single request ?
I did not try writing any code to do so yet, but I guess this snippet can do the work:
IRepository rCRM = JCO.createRepository("FLUSH_CRM", "java:comp/env/eis/pool_crm")
while (rCRM !=null)
   String [] crmFuncts = rCRM.getCachedFunctionInterfaces()
   String [] crmStructs = rCRM.getCachedStructureDefinitions()
   for (int i=0; crmFuncts!=null && i<crmFuncts.lenght; i++)
      rCRM.removeFunctionInterfaceFromCache(crmFuncts<i>);
   for (int i=0; crmStructs!=null && i<crmStructs.lenght; i++)
      rCRM.removeStructureDefinitionFromCache(crmStructs<i>);
   rCRM = rCRM.getNextRepository();
Does it ?
Edited by: Croussette Yves on Jun 9, 2008 8:46 PM
Edited by: Croussette Yves on Jun 9, 2008 8:47 PM

Hi,
Please check these link:-
1.[https://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/3219]
2.https://www.sdn.sap.com/irj/scn/thread?messageID=601915
3.https://www.sdn.sap.com/irj/scn/thread?messageID=135202
Best Regards,
Atul Bhatia

Increase the size of the cache using the cache.size= number of pages ?

Hi All,
I am getting this error when I do load testing.
I have Connection pool for Sybase database that I am using in my JPD. I am using Database control of weblogic to call the Sybase Stored procedure.
I got following exception when I was doing load testing with 30 concurrent users.
Any idea why this exception is coming ?
thanks in advance
Hitesh
javax.ejb.EJBException: [WLI-Core:484047]Tracking MDB failed to acquire resources.
java.sql.SQLException: Cache Full. Current size is 2069 pages. Increase the size of the cache using the cache.size=<number of pages>
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     at com.pointbase.net.netJDBCPrimitives.handleJDBCObjectResponse(Unknown Source)
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     at weblogic.jdbc.common.internal.ConnectionEnv.makeStatement(ConnectionEnv.java:1133)
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     at com.bea.wli.management.tracking.TrackingMDB.onMessage(TrackingMDB.java:115)
     at weblogic.ejb20.internal.MDListener.execute(MDListener.java:370)
     at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:262)
     at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2678)
     at weblogic.jms.client.JMSSession.execute(JMSSession.java:2598)
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     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)

hitesh Chauhan wrote:
Hi All,
I am getting this error when I do load testing.
I have Connection pool for Sybase database that I am using in my JPD. I am using Database control of weblogic to call the Sybase Stored procedure.
I got following exception when I was doing load testing with 30 concurrent users.
Any idea why this exception is coming ?
thanks in advance
Hitesh Hi. Please note below, the stacktrace and exception is coming from the
Pointbase DBMS, nothing to do with Sybase. It seems to be an issue
with a configurable limit for PointBase, that you are exceeding.
Please read the PointBase configuration documents, and/or configure
your MDBs to use Sybase.
Joe
>
javax.ejb.EJBException: [WLI-Core:484047]Tracking MDB failed to acquire resources.
java.sql.SQLException: Cache Full. Current size is 2069 pages. Increase the size of the cache using the cache.size=<number of pages>
     at com.pointbase.net.netJDBCPrimitives.handleResponse(Unknown Source)
     at com.pointbase.net.netJDBCPrimitives.handleJDBCObjectResponse(Unknown Source)
     at com.pointbase.net.netJDBCConnection.prepareStatement(Unknown Source)
     at weblogic.jdbc.common.internal.ConnectionEnv.makeStatement(ConnectionEnv.java:1133)
     at weblogic.jdbc.common.internal.ConnectionEnv.getCachedStatement(ConnectionEnv.java:917)
     at weblogic.jdbc.common.internal.ConnectionEnv.getCachedStatement(ConnectionEnv.java:905)
     at weblogic.jdbc.wrapper.Connection.prepareStatement(Connection.java:350)
     at weblogic.jdbc.wrapper.JTSConnection.prepareStatement(JTSConnection.java:479)
     at com.bea.wli.management.tracking.TrackingMDB.getResources(TrackingMDB.java:86)
     at com.bea.wli.management.tracking.TrackingMDB.onMessage(TrackingMDB.java:141)
     at com.bea.wli.management.tracking.TrackingMDB.onMessage(TrackingMDB.java:115)
     at weblogic.ejb20.internal.MDListener.execute(MDListener.java:370)
     at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:262)
     at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2678)
     at weblogic.jms.client.JMSSession.execute(JMSSession.java:2598)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)

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How to stop caching on the server

Hello,
Can anyone please guide me as to how do we disable caching on the
portal server since the changes i am making in the JSP pages are not
reflected immediately. I have already cleared the browser cache but now i
want to clear the cache on the portalserver. I have also cleared all the
class files created when the jsp was compiled but still there is no change.
If anyone has faced similar problems and can throw some light on it.
akshay

Akshay
I faced the same problem as you did.I went thru what Adrian advisesd and it works.Did
you update teh correct XML file?.In my case,the weblogic.xml file is whawt holds
this property and resides in
D:\wlportal4.0\applications\portal\dp2\WEB-INF\weblogic.xml
where 'dp2' is the sample portal iam working on.
I hope this helps.
- Logesh
"akshay" <[email protected]> wrote:
Hi Adrian,
Thanks again for the quick reply but even this setting
did not
work.
This has created a major development problem and the only way out i found
was either to restart the server or change the name of the file which
i am
accessing. Please suggest some other way to achieve this no caching state
on
the server i even cleared the browser cache.
Thanks in advance
akshay
"Adrian Fletcher" <[email protected]> wrote in message
news:[email protected]...
Akshay,
Ok, now I understand your problem. What you need to do is to changethe
JSP
operating parameters for this webapp. These parameters are found inthe
weblogic.xml file associated with your webapp. The reference for thejsp
descriptor element can be found here:
http://edocs/wls/docs61/webapp/weblogic_xml.html#1012195
I think the parameter you need to change is pageCheckSeconds. Ifyou set
this to 0 then the page is checked every request.
Hope this helps,
Sincerely,
Adrian.
Adrian Fletcher.
Senior Software Engineer,
BEA Systems, Inc.
Boulder, CO.
email: [email protected]
"akshay" <[email protected]> wrote in message
news:[email protected]...
Hi adrian,
Thanks for your quick reply I am not aware about theclustered
environment but here i have created a jsp page (named first.sjp)
to
check
a
connection pool i have created which i have placed it along with
the
index.jsp page of stockportal and using the following URl i havemade a
request http://<myportalserver>:7501/stockportal/first.jsp the first
time
when i request for this page it works fine -- the data flows perfectlybut
after making any changes say for example if i change the table name
from
where the data is to be fetched
it does not show me the new data it shows me the data from the previous
table. whereas if i change the name of the jsp page and request itworks
fine. I want to disable this caching
at the server to make this thing work i cleared all the cache ofthe
browser
but still could not achieve no cache state.
thanks in advance
akshay
"Adrian Fletcher" <[email protected]> wrote in message
news:[email protected]...
Akshay,
The design of the caching in portal is such that all changes should
be
reflected immediately, even across a cluster. However there isone
outstanding issue around a performance enhancement for the anonymoususer
case, where this cache is not updated unless the associated .portal
file
is
datasynced. So for changes to the default group either test with
a
logged
in
user of this group or do a datasync to clear the cache.
If this does not solve your problem please let us know.
Sincerely,
Adrian.
Adrian Fletcher.
Senior Software Engineer,
BEA Systems, Inc.
Boulder, CO.
email: [email protected]
"akshay" <[email protected]> wrote in message
news:[email protected]...
Hello,
Can anyone please guide me as to how do we disable caching
on
the
portal server since the changes i am making in the JSP pages
are not
reflected immediately. I have already cleared the browser cachebut
now
i
want to clear the cache on the portalserver. I have also cleared
all
the
class files created when the jsp was compiled but still there
is no
change.
If anyone has faced similar problems and can throw some light
on it.
akshay

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I m working on an applet displaying images for client side. So server will send me an image(picture),but for the first time i display the image,it will be successfully. when i want to view another new image ,it display the previous image, so i suspect the problem is the cache of the applet.so how do i clear the cache of an applet?

This is quiet clear:
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Hi,
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Regards
-Sandip

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https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/71d7b8dc-0701-0010-dfba-881dba1b5b95
- Regards, Dibya

How do I invalidate the cache in the JCos on EP Portal.

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