Apache in front of WLS in a cluster

          hi all,
          I have some doubts about apache and wls in a cluster. We have 2 Apache server
          (installed on 2 different hosts) in front
          of a clustered WLS 6.1. Now my doubt is: who will take care of authentication,
          Apache or WLS?
          In other words as the 2 instances of Apache don't know about each other (they
          are chosen with DNS-round robin), will the
          authentication be done twice? or it's possible to handle authentication on the
          application
          server rather ? if so, where the Cookie that identifies the session will be kept?
          Tanks a lot
          Francesco

It all depends on what you mean by authentication and how you configure each
          node.
          If you mean authentication re:SSL, then apache.
          If you have ACL's defined in Apache, then Apache will, but this is http
          basic auth, no cookies.
          If you have security defined in WLS or are using session's in WLS, then
          cookies will be set and passed from WLS all the way back to the client and
          then when a new request is made the cookie will be passed from the client to
          apache and back to wls.
          Cheers
          mbg
          "Francesco" <[email protected]> wrote in message
          news:[email protected]..
          >
          > hi all,
          > I have some doubts about apache and wls in a cluster. We have 2 Apache
          server
          >
          > (installed on 2 different hosts) in front
          > of a clustered WLS 6.1. Now my doubt is: who will take care of
          authentication,
          > Apache or WLS?
          > In other words as the 2 instances of Apache don't know about each other
          (they
          > are chosen with DNS-round robin), will the
          > authentication be done twice? or it's possible to handle authentication on
          the
          > application
          > server rather ? if so, where the Cookie that identifies the session will
          be kept?
          >
          > Tanks a lot
          > Francesco

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as far as I know there is no Apache Plugin for Windows Platform. Your
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-----Original Message-----
From: Steven Zhao [mailto:[email protected]]
Posted At: Friday, October 20, 2000 6:02 AM
Posted To: management
Conversation: Help about W2K Apache plug-in for WLS
Subject: Help about W2K Apache plug-in for WLS
Hi,everybody.
I want to use the W2K apache http server for redirect the dynamic
request to
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Edited by gbilodeau at 08/13/2007 10:59 AM
Edited by gbilodeau at 08/13/2007 10:59 AM

Hi,
Go through the following link and check whether you configured load balancing settings correctly or not.
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Can JMS topics and queues be clustered in a WLS 7.0 Cluster?

We are installing a weblogic 7.0 cluster with 1 admin server and 2 managed
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"Karim Ali" <[email protected]> wrote:
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          I'm currently working on a project with WLS 7 here at work, involving
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          BEA Systems Administrator
          TRX
          Atlanta, GA
          email: [email protected]
          office: 404-327-7238
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WLS Proxy in Cluster with Firewall

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Just wanted to let you know that everything is working with the latest patches for
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          Prasad Peddada wrote:
          > You might have to wait for the service pack. In the mean time I can give you a one
          > of patch for testing.
          >
          > - Prasad
          >
          > Don Davis wrote:
          >
          > > Thanks for the help Prasad,
          > >
          > > I have migrated to 5.1 and set the DNSName property.
          > >
          > > I will let you know if all goes well.
          > >
          > > Don Davis
          > >
          > > Prasad Peddada wrote:
          > >
          > > > The problem has been fixed.
          > > >
          > > > Prasad Peddada wrote:
          > > >
          > > > > I assume you are using 451. WLS proxy with firewall was not behaving right.
          > > > > Either you can wait for the next service pack or contact
          > > > > [email protected] for a one of patch.
          > > > >
          > > > > Remember to set weblogic.system.DNSName in the properties file for each
          > > > > server.
          > > > >
          > > > > - Prasad
          > > > >
          > > > > Don Davis wrote:
          > > > >
          > > > > > We are currently setting up a system that has a DMZ with Netscape inside
          > > > > > the DMZ proxying a WLS cluster that is behind the DMZ. When a cookie
          > > > > > based session is started a cookie is returned successfully, but it looks
          > > > > > like the physical address versuses a firewalled(NATed) address is placed
          > > > > > in the cookie. This in turn causes a failure on accessing the WLS
          > > > > > server. The firewall rejects future requests due to the use of the
          > > > > > physical instead of the NATed address.
          > > > > >
          > > > > > If you understand the above and can help I would appreciate it.
          > > > > >
          > > > > > Don Davis
          > > > > > D3, Inc.

UOO sequencing along with WLS high availability cluster and fault tolerance

Hi WebLogic gurus.
My customer is currently using the following Oracle products to integrate Siebel Order Mgmt to Oracle BRM:
* WebLogic Server 10.3.1
* Oracle OSB 11g
They use path service feature of a WebLogic clustered environment.
They have configured EAI to use the UOO(Unit Of Order) Weblogic 10.3.1 feature to preserve the natural order of subsequent modifications on the same entity.
They are going to apply UOO to a distributed queue for high availability.
They have the following questions:
1) When during the processing of messages having the same UOO, the end point becomes unavailable, and another node is available in order to migrate, there is a chance the UOO messages exist in the failed endpoint.
2) During the migration of the initial endpoint, are these messages persisted?
By persisted we mean that when other messages arrive with the same UOO in the migrated endpoint this migrated resource contains also the messages that existed before the migration?
3) During the migration of endpoints is the client receiving error messages or not?
I've found an entry on the WLS cluster documentation regarding fault tolerance of such solution.
Special Considerations For Targeting a Path Service
When the path service for a cluster is targeted to a migratable target, as a best practice, the path
service and its custom store should be the only users of that migratable target.
When a path service is targeted to a migratable target its provides enhanced storage of message
unit-of-order (UOO) information for JMS distributed destinations, since the UOO information
will be based on the entire migratable target instead of being based only on the server instance
hosting the distributed destinations member.
Do you have any feedback to that?
My customer is worry about loosing UOO sequencing during migration of endpoints !!
best regards & thanks,
Marco

First, if using a distributed queue the Forward Delay attribute controls the number of seconds WebLogic JMS will wait before trying to forward the messages. By default, the value is set to −1, which means that forwarding is disabled. Setting a Forward Delay is incompatible with strictly ordered message processing, including the Unit-of-Order feature.
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When unit-of-order messages are processed, they will be processed in strict order. While the current unit-of-order message is being processed by a message consumer, the next message in the unit-of-order will not be delivered unless it is to the same transaction or session. If no message associated with a particular unit-of-order is processing, then a message associated with that unit-of-order may go to any session that’s consuming from the message’s destination. This guarantees that all messages will be processed one at a time and in order, and any rollback or recover will not prevent ordered processing of the messages.
The path service uses a persistent store to save the state of which member destination a particular unit-of-order is currently using. When a Path Service receives the first message for a particular unit-of-order bound for a distributed destination, it uses the normal JMS load balancing heuristics to select which member destination will handle the unit and writes that information into its persistent store. The Path Service ensures that a new UOO, or an old UOO that has no messages currently on any destination, can be enqueued anywhere in the cluster. Adding and removing member destinations will not disrupt any existing unit-of-order because the routing decision is made dynamically and those decisions are persistent.
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Apache Proxy Plugin with SSL in Weblogic Cluster

Hi,
I have configured a weblogic cluster and configured SSL. Then I configured the apache plugin to work with the cluster machines with non ssl and worked succesfull but when I configured the ssl communication between apache and weblogic I´m having problems.
The actual configuration is:
<Location /spmlws>
SetHandler weblogic-handler
WLLogFile /var/log/httpd/tmpweblogic1.log
DebugConfigInfo ON
Debug ALL
KeepAliveEnabled ON
KeepAliveSecs 15
WebLogicPort 7002
SecureProxy ON
TrustedCAFile /opt/freeware/etc/httpd/conf/trustedCA35cert.pem
TrustedCAFile /opt/freeware/etc/httpd/conf/trustedCA36cert.pem
WLProxySSL ON
RequireSSLHostMatch false
WebLogicCluster machine35:7002,machine36:7002
EnforceBasicConstraints false
</Location>
The problem is that the plugin always takes the last TrustedCAFile. In this way if machine36 is down the plugin tries to send all the request to machine35 but it takes the TrustedCAFile for the machine36 (/opt/freeware/etc/httpd/conf/trustedCA36cert.pem) hence the apache complains
[Wed Jun 30 11:13:56 2010] [error] [client 10.19.232.249] ap_proxy: trying GET /spmlws/OIMProvisioning at backend host '10.19.232.97/7002; got exception 'WRITE_ERROR_TO_SERVER [os error=0, line 796 of ../nsapi/URL.cpp]: '
What can I do to have multiple TrustedCAFile or to have working the communication between apache and weblogic cluster using SSL?
thanks in advance

Acording to the documentation this is not possible.
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          Hi all,
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          Nanjan


On Unix you can also unplug the IP:port combo at the OS level ... but I
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          Peace,
          Cameron Purdy
          Tangosol Inc.
          << Tangosol Server: How Weblogic applications are customized >>
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          "Mike Reiche" <[email protected]> wrote in message
          news:3baf9a60$[email protected]..
          >
          > Physically unplug it from the netwok.
          >
          > Mike
          >
          > "Nanjan Selvaraj" <[email protected]> wrote:
          > >
          > >Hi all,
          > >
          > >I have multiple (more than 4) servers in a cluster on a WLS5.1, Netscape
          > >web server/Proxy-plugin
          > >on a Solaris environment - each running on separate boxes.
          > >
          > >Is there a way I can dynamically (run-time) take one server out of the
          > >cluster
          > >?
          > >
          > >(READ: Not shutting it down. Just taking it out of the cluster ONLY -
          > >it still
          > >needs to be up for me to do some diagnostics on that server).
          > >
          > >I have seen docs on doing it thru the Admin Console in WLS 6.X. What
          > >about 5.1
          > >?
          > >
          > >Thanks in advance for your help,
          > >Nanjan
          >

Apache Virtual Hosting and WLS 6.0 Apache plug-in

We have a client that uses Apache and virtual hosting. We also have a
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Therefore, all of the served virtual hosts/domain has the same webapp
directory structure ( e.g.: index.jsp, advert.jsp, css/ )
For the above to work, we are thinking of getting the requested virtual
hostname ( supposedly part of the HTTP header sent by the browser as the
"Host:" parameter ) to figure out how the page will be displayed ... Does
the Apache plug-in send this information to WLS?

Apache plugin will forward the "Host" header to wls.
BTW, HTTP1.0 client will not send the HOST header if I recalled properly since
HOST header is not part of HTTP1.0 spec.
Jesus M. Salvo Jr. <[email protected]> wrote:
>
We have a client that uses Apache and virtual hosting. We also have a
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Therefore, all of the served virtual hosts/domain has the same webapp
directory structure ( e.g.: index.jsp, advert.jsp, css/ )
For the above to work, we are thinking of getting the requested virtual
hostname ( supposedly part of the HTTP header sent by the browser as
the
"Host:" parameter ) to figure out how the page will be displayed ...
Does
the Apache plug-in send this information to WLS?

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          Regards,
          Steve


I'm running a WLS 6.0 SP2 clustered application on HP-UX 11i. I'm seeing          heap and
          > thread issues on start-up or invocation of my application as I deploy
          EJB's and create
          > DB connection pools. These are fairly trivial tasks that don't give me any
          issues
          > when starting the first node. It's only when I invoke the second node.
          >
          > I'm pretty sure that my issue is tied to the following kernel areas:
          >
          > 1. Thread allocation
          > 2. Heap allocation
          > 3. Max Processes per user
          >
          > Can anyone make some kernel recommendations that might be beneficial to my
          deployment?
          > My app runs on NT/2000 and Sun as well, and I haven't seen these issues. I
          typically
          > allocate 50 to 100 threads per node (3 nodes on a 4 CPU machine) and
          allocate about
          > 1GB of RAM per node on a 4GB machine...
          HP has some kernel tuning guidelines for Java server apps on their web site,
          and BEA has some notes as well in their platform support page.
          What issues specifically are you seeing?
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          Clustering Weblogic? You're either using Coherence, or you should be!
          Download a Tangosol Coherence eval today at http://www.tangosol.com/
          "Steve Feldman" <[email protected]> wrote in message
          news:3cdc046e$[email protected]..
          >

Apache in front of WLS in a cluster

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