Java cache library at cluster/server level

Hello Experts,
I need that some data will be available to all my users (the data is more or less constant so a cache is needed for better performance).
Does the SAP J2EE engine have standard cache library?
If yes, where can I find documentation?
If no, can someone recommend external library for caching?
Regards,
Omri

Perhaps the link below will help you, however I would recommend that you create a mechanism of Java Native Cache (How to Create a Simple In Memory Cache in Java (Lightweight Cache) • Crunchify) in an application (EJB or other) and call this application whenever the Web AS is started.
Thus it would be possible to access this EJB by JNDI and get the preloaded data.
Java Persistence in SAP Web Application Server
Best regards,
Angelo

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Java DC wrapped in J2EE Server Comp Library DC

Hi Experts
I have jxl.jar file, I imported this jar file in a Java DC and declared jxl.jar as public part. I created a Webdynpro DC and used the public part in it. I have created an application, component and a view in it using some classes of jxl.jar. I created a new J2EE Server Component Library DC and used the public part of jxl.jar in it again. Built the J2EE Server Component Library DC. Once done I got a .sda file. I deployed it in server. Once this is done, I have added the J2EE Server Component Library DC in my Webdynpro DC's Library Reference. Once I added this, i built it and deployed it. I got deployment finished with Warnings. Please see the exception below and Please advice.
Exception from NWDS Deployment Screen
"java.rmi.RemoteException: Error occurred while starting application wrigley.com/signauth/ui and wait. Reason: Clusterwide exception: server ID 6840450:com.sap.engine.services.deploy.container.DeploymentException: Clusterwide exception: Failed to prepare application wrigley.com/signauthui for startup. Reason=Clusterwide exception: Failed to start dependent library ''signauth/libraryimpl'' of application ''wrigley.com/signauthui''. Status of dependent component: STATUS_MISSING. Hint: Is the component deployed correctly on the engine?"
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J2EE Server Component DC - signauth/libraryimpl
Java External Library DC - signauth/library
FYI. I have created J2EE Server Component DC's name with more number of characters. Hope this shouldn't create issue. If this is also an issue, please let me know. I will reduce it and try.
Thank you
Best Regards
Ramamoorthy D

Hi Experts
Kindly help me out in getting a solution for this problem.
Thank you.
Best Regards
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All web sessions (Java) getting started on the cluster server

We have a clustered environment and are using Web Analyzer to access our BI system. I just recently discovered, however, that all of the web sessions are running on the clustered server, which should not be happening.
We use a virtual name when accessing the Web Analyzer URL (because of the clustered environment) but the same thing happens when I use the actual physical name of the primary server (taking out DNS as a possible cause of the problem).
So, my question is, what dictates where the web session gets launched? When looking in AL08 I see all of the web sessions running on our clustered server and their terminal name is the name of the primary server. Conversely, all SAP GUI sessions are running on the primary server, so I know this is just an issue with web/http related sessions.
I thought there might be a java attribute that dictated which server where these sessions got started (such as in the dispatcher config) but I can't find anything, plus I know it's not a load-balancing issue because the web sessions never start on the primary server.
Thanks for any insight
Ross

We have two separate instances each running on their own physical server. Thus, it is possible to go to the java port of each individual server; ie. http://server1:port or http://server2:port. The cluster is setup such that either server could go down and the remaining server will keep working.
When I use the virtual server name (which resolves to server1) in the URL, the http session actually always gets sent to server2 with server1 as the terminal name (when looking in sm04 or al08).
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Sun Java Studio Enterprise 8 Application Server

I'm trying to get the JSE8 Application Server to run as a service. I've read other forum articles and none of them really answered my question. So, I tried to implement the JSE8 server via the JavaServiceWrapper approach (and, I was successful). The only problem is that when I log on and then log off the computer running the application server, the application server stops.
So, I have several questions. One is, "why does the application server stop when it detects a user logoff, especially if the user it was started under wasn't even the one logging off?"
The second question is where is the documentation mentioned in other e-mails regarding how to set up the JSE8 server as a service per Sun's guidelines (I can't find it anywhere; a web link would be most helpful here).
Finally, is Sun planning on changing this so the JSE8 application server runs as a "real" service to make deployment much easier in a Windows environment (like version 7 did)?

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# Java Application
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# classes are provided to do this for you. See the Integration section
# of the documentation for details.
wrapper.java.mainclass=org.tanukisoftware.wrapper.WrapperSimpleApp
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WEB EX Java in conflict with Admin Server

I have Successfully load 11.1.2.1 in my windows 7 laptop
but when I have attempted to a Webex and and load there Java piece
i can not use Essbase
the Admin Server - Stops Running
and Ideas
Please Advise
Edited by: Next Level on Dec 20, 2011 6:28 AM

Hi Denis,
Thanks for your good answer on my issue.
I believe Java cache like memory leakage is one problem but I don't know where to check this and needs to be delete unwanted files(if any) on Microsoft windows 2003 standard edition sp2
I am trying all possible solutions to make it work in PROD because we are alrready in middle of migration of BCA server from MS 2000 to MS 2003
Please let me know if you have any other ideas to resolve it
Kind Regards,
Srinivas
(M):9886092111

Java Cache Issue on SAP MII 12.1 SP09 (Build 116)

Hi All,
Has anybody experienced this issue before?
Problem Description
This installation is a central MII instance, which is HP hosted in Swindon, UK. On Login we are experiencing a delay in loading the Java Applets, i.e. iGrids, iCharts, iCommands etc. After the first screen load the performance improves. When we close the session and re-enter, the performance on the first screen is delayed.
Problem Investigation
We have compared this project to other MII instances and investigated the cache loading of each of the MII installations. What we have noticed is that the Java is not being cached on the client side for the MII server V12.1 SP09 (Build 116). We had three MII servers, with this version, and we are experiencing the same issue. We have other instances of version 12.1.7, 12.1.8, and 12.2.0 and the cache functionality is working fine.
To view the cache we are opening the Java Cache viewer on the Java Control Panel, and we are looking for the file u201Cillum8.zipu201D which is the MII Java library. This investigation was done using the same Client Java Runtime version and IE Version.
Software Versions used: JavaRuntime version: 1.0.6_22 & Internet Explorer 8.0
Any advice/help much appreciated.
Regards,
Henry

Hi Henry,
Not sure this has any bearing, but what NW version and SP is MII sitting on top of?
Thanks,
Mike

Java networking library with RMI-like functionality?

Is anyone aware of a Java networking library, that provides RMI like functionality and TCP/IP with an intuitive API and minimal coding required? I'm working on a prototype, but I'm having difficulty getting Java's RMI functionality working through Netbeans, so while I'm prototyping I'm looking for alternatives so I can code more and frustrate less!
Thanks

BobCrivens wrote:
Thanks ejp.
I guess I'll re-phrase the original question. Is there a small open-source Java networking library that doesn't include RMI, but gives a simple API for TCP/IP connections (higher level than sockets) and includes file transfer? I don't know if I need things like FTP/HTTP/POP/SMTP support etc for now.
ThanksI gotta be honest with you here. I think you need to stop coding for now and get your requirements in hand with a better grasp on how network programming works.
Not being insulting here but your questions show your current knowledge level on the subject to be not really sufficient for success with whatever it is you want to do.
There is the networking tutorial available here http://java.sun.com/docs/books/tutorial/networking/index.html but it might do you well to tell us exactly what you are trying to do. Are you trying to build an FTP client? Are you trying to build a whole client/server program of some sort?
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How can I correlate an Java instance number with a server id?

I have 6 Web App Server running ABAP and the JAVA stacks. I can log into the Central Instance server and run /usr/sap/<SID>DVEBMSG00/j2ee/configtool/configtool.sh and bring up the GUI interface to "see" all the instances and their variables. I don't see an easy way to trace back the Java INSTANCE to the physical server's hostname.
Is there a central repository to correlate a Web App Server Java instance number to the actual hostid/hostname of the target server? I realize I can log into each Web App Server and look at the /usr/sap/<SID>D00/j2ee/cluster/instance.properties and find the Instance number, but I was wondering if this information was held in the SAP Central instance or SAP Database somewhere.

Hi Timothy,
The instance ID used for the JAVA cluster is generated at installation time, and -amongst other things- takes into account the time it was generated. We installed two instances in parallel (on different hosts) and ended up with almost the same instance ID.
Because this can be very confusing, we asked SAP if this was changable - in theory it is only an ID which could be changed as long as it is updated on all places the identifier is stored - but SAP indicated that that is not possible, nor supported. We ended up with a diagram of the system architecture with all the identifiers on our desk.
Note that in the config tool - all instances are displayed with their system instance number. If you were to install a new system it might be usefull to install all instances with different instance numbers so you and distinguish more easily between them.
Hope this helps,
Cheers,
Walter

How to install & confgiure Oracle9i on Veritas Cluster Server

Hi,
I want to know how to install oracle9i on Veritas Cluster Server having OS as Solaris 9. Also How to configure oracle in VCS so that it can be failover.
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Thanks,
Shrikant

I want to install following component
Oracle 9i form server & report server
Oracle HTTP Server in SSL mode
Oracle As Web Cache
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Arvind

Failover cluster server - File Server role is clustered - Shadow copies do not seem to travel to other node when failing over

Hi,
New to 2012 and implementing a clustered environment for our File Services role. Have got to a point where I have successfully configured the Shadow copy settings.
Have a large (15tb) disk. S:
Have a VSS drive (volume shadow copy drive) V:
Have successfully configured through Windows Explorer the Shadow copy settings.
Created dependencies in Failcover Cluster Server console whereby S: depends on V:
However, when I failover the resource and browse the Client Access Point share there are no entries under the "Previous Versions" tab.
When I visit the S: drive in windows explorer and open the Shadow copy dialogue box, there are entries showing the times and dates of the shadow copies ran when on the original node. So the disk knows about the shadow copies that were ran on the
original node but the "previous versions" tab has no entries to display.
This is in a 2012 server (NOT R2 version).
Can anyone explain what might be the reason? Do I have an "issue" or is this by design?
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Kathleen Hayhurst Senior IT Support Analyst

Hi,
Please first check the requirements in following article:
Using Shadow Copies of Shared Folders in a server cluster
http://technet.microsoft.com/en-us/library/cc779378(v=ws.10).aspx
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locally.
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Webutil_file_transfer url_to_client places objects in the Java Cache

Hi,
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Once I downloaded the PDF file, it is visible in the Client Java Cache Viewer. When I try to run the download again webutil takes the PDF from the Cache instead taking the newer PDF from the Server where the URL is pointing to.
So the URL I passing is each time the same, but the PDF file on the Server is getting updated very often.
I don't usethe WEBCACHE port!
My question now is. Can I avoid webutil to put does PDF file in the Java Cache on the Client. Or is there any utility to remove selected objects from the Java Cache.
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Fatih

Hi Craig,
with the help of Oracle Support, we found the reason and also a workaround for this issue.
The real cause:
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WEBUTIL does not touch this parameter, so it keeps staying default (true).
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With the methode setDefaultUseCaches it possible to disable/enable the default Cache setting.
So it's possible to disable the cache with a small Java Bean running in Forms, which disable the Cache before WEBUTIL_FILE_TRANSFER and enable it after the successfull download.
here is an extract of the bean code:
URL u = new URL( "http:" );
URLConnection uc = u.openConnection();
uc.setDefaultUseCaches(false);
thank you for your time!
regards,
Fatih

Deploy jw webservice to cluster server, always point to 9081

i have cluster server(9081, 9082, 9083), when i deploy the helloword webservice generated by jwsc http://download.oracle.com/docs/cd/E12840_01/wls/docs103/webserv/use_cases.html,
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Thanks for looking into it. Clean cache doesn't work for me. Since it works fine for you. I think the issue might related to create/deploy ear file. i don't have cluster setup on my local, so i created ear file and deployed to our DEV(unix) server thru admin console. the web-uri in application.xml generated by the jwsc contains the path examples/webservices/hello_world/HelloWorldImpl.war, instead of HelloWorldImpl.war. i have to manually updated the uri, otherwise i got "not be able to identifiy application path ......war" during install. Since Axis works fine cluster config should be ok. Do you mind share how you config the cluster and how to generate the ear file? this are the two possible places i can think of. i also tried set FrontEnd HTTP Port for each server, still didn't work.
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Issue with Java cache

Hi friends,
I'm in PI 7.3 environment, my problem is - when I try to access ESB and IB, it says that it is Unable to download.
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I came across all the links in sdn but not solves my issue. Kindly share exact to do things - to fix the issue.
Many thanks.
Swarnaalu.

Hi Swarna,
There might be some problem with javawebstart you can try uninstalling java and try to reinstall so that it will work.
OR
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http://SERVER:PORT/rep/start/index.jsp
3. On the Upper right part of your screen you will see Tools
Administration Client Installation and Guidelines Documentation.
Click Administration
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5.1 When this problem occur with Integration Repository > make sure you
are in Integration REPOSITORY TAB. Proceed with step 6. Skip step 5.2.
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the application has to be deployed again.
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Java SSF library

We are trying to use SSF ( digital signatures ) as authentication mechanism for Archive Link through HTTP Interface.ABAP code is generating PKCS#7 signed URL and we want to verify it using Java SSF library in an external system.SAP documentation talks about JAVA IAIK toolkit can be downloded from Service market place. I can't find it on service.sap.com. Does anybody know where can I download JAVA SSF from ?
cheers
Ramesh.

Hi Aldo,
The java packages where this classes and interfaces are implemented are:
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Also look the following SAP Help link [Secure Store and Forward Mechanism (SSF)|http://help.sap.com/saphelp_nw2004s/helpdata/en/4d/bf6f77a2c5446a86e0152f1b309db6/frameset.htm]
Please reward if helpful.
Regards
Alexandre

Java Cache Viewer shows duplicate URL with different versions

In doing some testing lately we have come across a couple of situations where the same URL is showing in the JAVA cache viewer with different versions to them. In the case of a 1.7 JRE this is not causing any adverse effects however when utilizing a 1.6 JRE we are getting messages about mixed mode for the JAR files.
The jar file is signed as below:
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understanding the need to change the wildcard's to domains as we move forward. I am wondering why the jar file is being listed and called twice and why it is being recognized as signed one time and not the next.
The URL is identical in the cache viewer and the java console says it is not found in the cache when it is used the second time, even though previously in the session is finds it with the correct version.
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that i even know, but the problem is that i do not have that version of java re installed, but i found distribution 07 of the same java version, i'll try it out with that.
but when it still doesn't work, then i still would like to find the link where i can download java version 1.4.2_06.

Java cache library at cluster/server level

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