Solved

what is the concept of stub in WebLogic Clustering

Posted on 2009-07-14
6
3,257 Views
Last Modified: 2013-12-10
Hi Guys,

Suppose that a server in a cluster failed due to some reasons and now how is the request is going to be forwarded to other servers without going to the faialed server. I know it uses stub but I do not know the concepts. Also, what is replica aware stub.

Could you be more specific.

what is the purpose of SerializedSystemIni.DAT file which resides in WL_HOME/DOMAIN_HOME/security in weblogic ?

Thanks,
Charan
0
Comment
Question by:NikhilKotagiri
  • 4
  • 2
6 Comments
 
LVL 10

Accepted Solution

by:
rajesh_bala earned 500 total points
ID: 24856076
Hi Charan,

Let us try to get the questions one by one.

are you asking from EJB stub perspective or servlet perspective?

In the case of servlets, you would have configured proxy_server which is aware of all the nodes in the cluster. So the incoming request would have the proxy_server address. Proxy based on the heartbeat mechanism will route it to appropriate managed node. If the managed node is down, it will communicate to the next one. Various algorithms are there for doing this like round-robin, weighted round robin, random, etc.

In the case of EJB, at the time of compilation itself the server can determine what are the cluster nodes in the cluster and incorporate them into stubs. So when you connect to this EJB, the stubs themselves know what are the nodes in the cluster and if one goes down, it will automatically contact the second and so on.

SerializedSystemIni.DAT - This is more of internal details of weblogic which user need not bother about unless otherwise he has very specific reason. Are there any specific question you have on this?
0
 
LVL 10

Expert Comment

by:rajesh_bala
ID: 24856081
Ideally SerializedSystemIni.DAT should have the passwords, admin related username and passwords there. If you can be more specific, i can get more details
0
 
LVL 10

Expert Comment

by:rajesh_bala
ID: 24856083
You can refer to this as well for SerializedSystemIni.DAT

http://e-docs.bea.com/wls/docs81/secmanage/passwords.html
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 

Author Comment

by:NikhilKotagiri
ID: 24856529
do you this (stub) only for servlets and EJB. how can I configure proxy_server

Thanks for clearing my doubt on SerializedSystemIni.DAT
0
 
LVL 10

Expert Comment

by:rajesh_bala
ID: 24856586
stubs are created for RMI and EJB.

Not for servlets. Servlets work on http mode.
0
 

Author Comment

by:NikhilKotagiri
ID: 24859389
could you provide me the link (bea docs) for STUBS
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Weblogic Logs 4 129
Secure cookies 1 61
google app engine for my little app & pricing? 2 54
Running Java application as ordinary user 24 93
Configure Web Service (server application) I. Configure security for Web Services methods First, we need to protect Session bean which implements the service: 1. Open EJB deployment descriptor (ejb-jar.xml) in the EJB project that contains you…
Verbose logging is used to diagnose garbage collector problems. By default, -verbose:gc output is written to either native_stderr.log or native_stdout.log.   It is also possible to redirect the logs to a user-specified file. This article will de…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now