Load balancing over rmi requests

On a cluster of ias10g (9041), Is it possible that all requests over RMI use a "virtual" hostname and port which directs them to a load balancing mechanism which then determines which of the operational OC4J instances should process this request?

Does anyone know anything on this question?

Similar Messages

Load balancing on RMI Server Application

Hi there, I'd like to know more detail about load balancing on RMI server application, been digging the web for some time, but couldn't find much information, does anyone know any website or has the knowledge of load balancing on RMI to share? Sort like its design and implementation.
Thanks,
Jax

I want performance and fault-tolerance,
In that case, is it necessary to have a main
rmi server to allow client to access and pick one of
the rmi servers for the client?Well, if you have one main RMI server, you have a single point of failure again.. Why can't your application know about all rmi servers, and randomly choose one? If it's down, pick a different one.. If your applicatoin is an applet, you'll have to sign it.. Do that and put it on 2 redundant web servers. You have performance by splitting the load and you have your fault tolerance by having x identical rmi servers.
If you're saying what I think, why would you have one main rmi server that picks a different rmi server? That's more work AND your redundancy goes byebye, ie if your main rmi server dies..

Load balancing over multiple E3s

Hi all,
For the same VP , can I make load balancing over multiple E3s connected bet the BPX 8600 and MGX 8850.
Asking the question in another way:
Is there a possibility for load balancing over multiple LSPs (multiple E3 interfaces) in Cell-Mode MPLS...and if possible,plz provide me with any good links for configuration.

Following link might be useful to you
http://www.cisco.com/univercd/cc/td/doc/product/wanbu/bpx8600/9_2/ref92/bpxrtag.htm

Load balancing over two separate outside routers and two separate WAN Links

Hi everybody,
I have one 2851 setup with two separate ISP links and have it configured for failover with BGP. It works great but doesn't load balance.
Well now I have to new routers (3925's) to replace the single 2851 and I want to configure them to load balance over separate WAN links.
Can someone help figure out the best approach to make this happen? I would really appreciate it.
Thank you,
Thomas Reiling

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The "best approach", IMO, would be to use PfR (if your routers support it).

Weblogic 10.3.6 - Load balancing- sending duplicate requests 5 min

Hello,
         We have configured clustering and load balancing to our integration solution as mentioned at http: //abhinavgupta3.blogspot.in/2012/02/osb-clustering-load-balancer.html
But when ever a requests goes through load balancer and if that requests goes beyond 5 min (300Sec), then load balancer generating new request and that request is being redirected to another node.
As per my blogging I found there is some setting need t
Because of this we are going to ambiguous situation.o configured at load balancer for not falling in to this situation.Its about a property called 'Idempotent'
Please help me on this.
Thanks,
Satyendra

"The datasource is created successfully from the console so there's no problem with the jar file."
Did you also test the data source when you created it?
- when yes then WebLogic can indeed find the derbyclient.jar as the driver org.apache.derby.jdbc.ClientDriver is part of it.
"I specified in the weblogic.xml that the antlr.* classes should be taken from the application. Also tried this option for org.apache.derby.* classes."
Have you only defined a
<prefer-application-packages>
    <package-name>antlr.*</package-name>
    <package-name>org.apache.derby.*</package-name>
</prefer-application-packages>in weblogic.xml or did you also turn on prefer-web-inf-classes?
It is smart to start from scratch and delete all the jar files in all the directories. To make the derbyclient.jar part of the WebLogic classpath you can do the following:
- edit setDomainEnv: When you open setDomainEnv there is an entry like "SET THE CLASSPATH". Just before - if [ "${JAVA_VENDOR}" != "BEA" ] ; then
you can put something like: CLASSPATH=${CLASSPATH}${CLASSPATHSEP}location/derbyclient.jar
If the class must be available on every server in a cluster, you can edit the commEnv file (located in the ${WL_HOME}/common/bin directory)
Search for the entry "set up WebLogic Server's class path". And below the WEBLOGIC_CLASSPATH you can add something like:
WEBLOGIC_CLASSPATH=${WEBLOGIC_CLASSPATH}${CLASSPATHSEP}location/derbyclient.jar
Hope this helps you a little

Load balancing Http/https requests of SRM

Hi all,
we are on SRM 5.0 with CI and one DI , we don't have any web dispatcher for routing http/https requests.
Currently CI is flooded with all requests and DI is sitting idle no routing is going on.... and users are experiencing Time out expceptions ...
we have configured SMLG and services in SICF have group assigned...
we have BI portal where users log in and access all SRM web applications like shopping cart, invoice....
Please suggest how to handle the load balancing of http/https requests with message server...
Thanks,
Subhash.G

Thanks

Load balancer vs. Request Management

I am wondering what are the functionalities RM provides however load balancer. I was thinking that health based routing RM can provide however load balancer can't. But it seems that load balancer
can also provide this functionality , refer below link.<o:p></o:p>
http://social.msdn.microsoft.com/Forums/en-US/6be22098-bce8-4709-9403-4599b9599973/health-based-load-balancing?forum=sharepointadmin<o:p></o:p>
Could anyone please tell me what is a additional functionalities RM can provide compare to load balancer?
Regards Restless Spirit

As far i know RM will serve the same purpose of load balance with much more flexible rule for routing, e.g request throttling based routing, you can build more flexible routing logic based on various param available in RM.
You can take a look at this:-
http://social.technet.microsoft.com/wiki/contents/articles/16177.request-management-in-sharepoint-2013.aspx
Mark ANSWER if this reply resolves your query, If helpful then VOTE HELPFUL
INSQLSERVER.COM
Mohammad Nizamuddin

CSS11000 Load Balance over two VPN connections?

Is it possible to have a CSS11000 in a local site perform load balancing and fail over to two different destinations on the internet that require a VPN connection. The VPN will be a router to router VPN using 7206s.
Bruce
mailto:[email protected]

Hello Bruce !
CSS is designed to handle TCP- and UDP based traffic, not IPSec. When handling IPSec traffic Content Switching Module (CSM) inside Catalyst 6500 series is recommended for that purpose.
More info:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/cfgnotes/csm/index.htm
- Tomi

Load balancing over multiple NIC cards

Is it possible to setup some kind of load balancing at the OS level on a V240 running Solaris 8?
I've got all 4 NIC cards populated (2 each on different subnets with clients coming from both subnets and elsewhere) and I've like to setup some load balancing at the operating system to (dynamically) route the load across the most appropriate interface. Is this possible? I feel I should be getting more bang for my buck here, but I just cant find any info on what I'd like to do.
Thanks for the help.

You can use IPMP in order to have load balancing for the outbound traffic. It's working fine, i have used it on many machines.
Now, if you want to trunk the throughput of your interfaces (for inbound and outbound traffic), you need to acquire sun trunking software. It can truncate up to 8 100Mbps interfaces, or up to 2 1Gbps interfaces.

How to see the Source IP Address of a client using ACE One-armed-mode to load balance HTTP proxy request

I'm using an Ace 4710 Appliance deployed in One-Armed mode, using Source NAT to loadbalance HTTP request to a couple of Proxy servers.
Everything is working fine, but the thing is that I can't see the Clients IP addresses on Proxy's logs, so I can't keep track of them.
The Interfaces and Nat configs are:
interface vlan 200
description Server-Side-VLAN
bridge-group 5
nat-pool 5 10.1.1.5 10.1.1.5 netmask 255.255.255.0 pat
service-policy input VIPS
interface vlan 300
description Client-Side-VLAN
bridge-group 5
interface bvi 5
ip address 10.1.1.3 255.255.248.0
description Client-Server-Virtual-Interface
ip route 0.0.0.0 0.0.0.0 10.1.1.1
and the policy map looks like this
policy-map multi-match VIPS
class Port80
    loadbalance vip inservice
    loadbalance policy Port80
    nat dynamic 5 vlan 200
Resource assignment:
sticky ip-netmask 255.255.255.255 address both RESOURCE-CLASS
timeout 5
serverfarm Service80
Any suggestions will be appreciated,
Thanks

Hi Kanwal,
Thanks for your quick reply,
I've already tried this but it didn't work. The problem is that I don't manage the proxy servers so I rely on their skills to see the logs.
The Proxies are Squid. Do you know if they need to do something else on the servers to see that field of the HTTP header?
But I'll try again tomorrow and let you know how it goes.
Thank you again.

Two load balanced server sending requests to external system on different protocol

Hi,
I have two loadbalanced OEG servers (server A and server B) with same endpoint configurations in envsetting.props. But when requesting the service, it is creting different URI in both servers. In one of server (server A)it sets URI with following details :
DEBUG   30/Mar/2015:07:29:34.356 [92b0e940]     Set host='abc.tdc.dk'
DEBUG   30/Mar/2015:07:29:34.356 [92b0e940]     Set port='80'
DEBUG   30/Mar/2015:07:29:34.356 [92b0e940]     Set scheme='https'
and fails with following error : ERROR   30/Mar/2015:07:29:34.370 [92b0e940]         [SSL_connect, 0x1220]: error - SSLv2/v3 read server hello A.
However another server (server B),sets URI as :
DEBUG   30/Mar/2015:07:29:34.356 [92b0e940]     Set host='abc.tdc.dk'
DEBUG   30/Mar/2015:07:29:34.356 [92b0e940]     Set port='80'
DEBUG   30/Mar/2015:07:29:34.356 [92b0e940]     Set scheme='http'
and successfully processes the request.
So can you please help here to know even if we are using same endpoints configuration (abc.tdc.dk ) and port (80) on both the servers , then why the URL is set as http on one of server and https on another.
Thanks !!!
Akshay

Hi
Thanks for immediate respose. I tried the ping/acknowledgement example in the biginning itself. It doesn't work. I also tried by changing the agents ( to respective values suitable for my systems) of that example. Then also it failed. The error in that case also same. The message will not propogate from the out going agent.

Apache plug-in won't load balance requests evenly on cluster

I can't seem to get the Apache plug-in to actually do round-robin load balancing
of HTTP
requests. It does random-robin, as I like to call it, since the plug-in will usually
hit all the
servers in the cluster but in a random fashion.
I've got three managed servers:
192.168.1.5:8001 (WL6 on Linux) 192.168.1.2:8001 (WL6 on Linux) 192.168.1.7:8001
(WL6 on Linux)
Admin server on 192.168.1.7:7000 (WL6 on W2k)
My Apache server is 1.3.9 (RedHat SSL) on 192.168.1.52.
The log file for each servers has something like this:
####<Apr 19, 2001 1:18:54 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<main> <system> <> <000102> <Joined cluster cluster1 at address 225.0.0.5 on port
8001>
####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<ExecuteThread: '9' for queue: 'default'> <> <> <000127> <Adding
3773576126129840579S:192.168.1.2:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster> ####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune>
<cluster1server1> <ExecuteThread: '11' for queue: 'default'> <> <> <000127> <Adding
-6393447100509727955S:192.168.1.5:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster>
So I believe I have correctly created a cluster, although I did not bother to
assign
replication groups for HTTP session replication (yet).
The Apache debug output indicates it knows about all three servers and I can see
it
doing the "random-robin" load balancing. Here is the output:
Thu Apr 19 00:20:53 2001 Initializing lastIndex=2 for a list of length=3 Thu Apr
19
00:20:53 2001 Init Srvr# [1] = [192.168.1.2:8001] load=1077584792 isGood=1077590272
numSk ip=134940256 Thu Apr 19 00:20:53 2001 Init Srvr# [2] = [192.168.1.5:8001]
load=1077584792 isGood=1077590272 numSk ip=134940256 Thu Apr 19 00:20:53 2001
Init Srvr# [3] = [192.168.1.7:8001] load=1077584792 isGood=1077590272 numSk
ip=134940256 Thu Apr 19 00:20:53 2001 INFO: SSL is not configured Thu Apr 19
00:20:53 2001 Now trying whatever is on the list; ci->canUseSrvrList = 1 Thu Apr
19
00:20:53 2001 INFO: New NON-SSL URL Thu Apr 19 00:20:53 2001 general list: trying
connect to '192.168.1.7'/8001 Thu Apr 19 00:20:53 2001 Connected to 192.168.1.7:8001
Thu Apr 19 00:20:53 2001 INFO: sysSend 320 Thu Apr 19 00:20:53 2001 INFO:
Reader::fill(): first=0 last=0 toRead=4096 Thu Apr 19 00:21:06 2001 parsed all
headers
OK Thu Apr 19 00:21:06 2001 Initializing lastIndex=1 for a list of length=3 Thu
Apr 19
00:21:06 2001 ###Response### : Srvr# [1] = [192.168.1.5:8001] load=1077584792
isGood=1077 546628 numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response###
: Srvr# [2] = [192.168.1.2:8001] load=1077584792 isGood=1077 546628
numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response### : Srvr# [3] =
[192.168.1.7:8001] load=1077584792 isGood=1077 546628 numSkip=1077546628 Thu Apr
19 00:21:06 2001 INFO: Reader::fill(): first=0 last=0 toRead=4096
Basically, the lastIndex=XXX appears to be random. It may do round-robin for 4
or 5
connections but then always it resorts to randomly directing new connections.
This is what the configuration looks like using the plug-in's
/weblogic?__WebLogicBridgeConfig URL:
Weblogic Apache Bridge Configuration parameters:
WebLogic Cluster List:
1.Host: '192.168.1.2' Port: 8001 Primary
General Server List:
1.Host: '192.168.1.2' Port: 8001
2.Host: '192.168.1.5' Port: 8001
3.Host: '192.168.1.7' Port: 8001
DefaultFileName: ''
PathTrim: '/weblogic'
PathPrepend: '' ConnectTimeoutSecs:
'10' ConnectRetrySecs: '2'
HungServerRecoverSecs: '300'
MaxPostSize: '0'
StatPath: false
CookieName: JSESSIONID
Idempotent:
ON FileCaching:
ON ErrorPage: ''
DisableCookie2Server: OFF
Can someone please help to shed some light on this? I would be really grateful,
thanks!
Jeff

Right - it means that the only configuration which can do perfect round-robin is a
single plugin (non-Apache, or single-process Apache) - all others essentially do random
(sort of, but it can skew test results during first N requests).
Robert Patrick <[email protected]> wrote:
Dimitri,
The way Apache works is that is spawns a bunch of child processes and the parent process
that listens on the port delegates the processing of each request to one of the child
processes. This means that the load-balancing dome by the plugin before the session ID is
assigned does not do perfect round-robining because there are multiple copies of the plugin
loaded in the multiple child processes. This situation is similar to the one you would get
by running multiple proxy servers on different machines with the NES/iPlanet and IIS
plugins.
As I pointed out in my response to Jeff, attempting to address this problem with IPC
machanisms would only solve the single machine problem and most people deploy multiple
proxy servers to avoid a single point of failure...
Hope this helps,
Robert
Dimitri Rakitine wrote:
Hrm. This is strange - I thought that all the information nesessary for a
'sticky' load-balancing (primary/secondary) is contained in the cookie/session info,
so, the particular plug-in implementation should not make any difference. For
load-balancing - statistically, given large enough sampling base, Apache plug-in
should perform just a well as NS one (unless apache is somehow misconfigured and
calls fork() for each new request).
Jeff Calog <[email protected]> wrote:
Robert,
Thanks for the sanity reply, you are definitely right. I used Netscape 3.0 on
Win2k and it did perfect round-robin load balancing to my servers.
<raving>
BEA - ARE YOU LISTENING? STOP TELLING PEOPLE YOUR APACHE PLUG-IN IS A VIABLE
LOAD BALANCING SOLUTION! It's worthless for load balancing!
</raving>
In some tests, as many as 90% of my connections/requests would be sent to a single
server. There should be something in the release notes like "By the way, the
Apache plug-in is only advertised as doing round-robin load balancing, in reality
it doesn't work worth a darn".
I'm surprised they don't used shared memory or some other technique (pipes, sockets,
signals, writing to /tmp, anything) for interprocess communication to fix that.
Jeff
Robert Patrick <[email protected]> wrote:
Yes, the problem lies in the fact that Apache uses multiple processes
instead of
multiple threads to process requests. Therefore, you end up with multiple
processes all
with the WebLogic plugin loaded into them (and they cannot see one another)...
Hopefully, Apache 2.0 when it comes out will allow the plugin to do a
better job...
Jeff Calog wrote:
I can't seem to get the Apache plug-in to actually do round-robin loadbalancing
of HTTP
requests. It does random-robin, as I like to call it, since the plug-inwill usually
hit all the
servers in the cluster but in a random fashion.
I've got three managed servers:
192.168.1.5:8001 (WL6 on Linux) 192.168.1.2:8001 (WL6 on Linux) 192.168.1.7:8001
(WL6 on Linux)
Admin server on 192.168.1.7:7000 (WL6 on W2k)
My Apache server is 1.3.9 (RedHat SSL) on 192.168.1.52.
The log file for each servers has something like this:
####<Apr 19, 2001 1:18:54 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<main> <system> <> <000102> <Joined cluster cluster1 at address 225.0.0.5on port
8001>
####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<ExecuteThread: '9' for queue: 'default'> <> <> <000127> <Adding
3773576126129840579S:192.168.1.2:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster> ####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster><neptune>
<cluster1server1> <ExecuteThread: '11' for queue: 'default'> <> <><000127> <Adding
-6393447100509727955S:192.168.1.5:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster>
So I believe I have correctly created a cluster, although I did notbother to
assign
replication groups for HTTP session replication (yet).
The Apache debug output indicates it knows about all three serversand I can see
it
doing the "random-robin" load balancing. Here is the output:
Thu Apr 19 00:20:53 2001 Initializing lastIndex=2 for a list of length=3Thu Apr
19
00:20:53 2001 Init Srvr# [1] = [192.168.1.2:8001] load=1077584792 isGood=1077590272
numSk ip=134940256 Thu Apr 19 00:20:53 2001 Init Srvr# [2] = [192.168.1.5:8001]
load=1077584792 isGood=1077590272 numSk ip=134940256 Thu Apr 19 00:20:532001
Init Srvr# [3] = [192.168.1.7:8001] load=1077584792 isGood=1077590272numSk
ip=134940256 Thu Apr 19 00:20:53 2001 INFO: SSL is not configured ThuApr 19
00:20:53 2001 Now trying whatever is on the list; ci->canUseSrvrList= 1 Thu Apr
19
00:20:53 2001 INFO: New NON-SSL URL Thu Apr 19 00:20:53 2001 generallist: trying
connect to '192.168.1.7'/8001 Thu Apr 19 00:20:53 2001 Connected to192.168.1.7:8001
Thu Apr 19 00:20:53 2001 INFO: sysSend 320 Thu Apr 19 00:20:53 2001INFO:
Reader::fill(): first=0 last=0 toRead=4096 Thu Apr 19 00:21:06 2001parsed all
headers
OK Thu Apr 19 00:21:06 2001 Initializing lastIndex=1 for a list oflength=3 Thu
Apr 19
00:21:06 2001 ###Response### : Srvr# [1] = [192.168.1.5:8001] load=1077584792
isGood=1077 546628 numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response###
: Srvr# [2] = [192.168.1.2:8001] load=1077584792 isGood=1077 546628
numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response### : Srvr#[3] =
[192.168.1.7:8001] load=1077584792 isGood=1077 546628 numSkip=1077546628Thu Apr
19 00:21:06 2001 INFO: Reader::fill(): first=0 last=0 toRead=4096
Basically, the lastIndex=XXX appears to be random. It may do round-robinfor 4
or 5
connections but then always it resorts to randomly directing new connections.
This is what the configuration looks like using the plug-in's
/weblogic?__WebLogicBridgeConfig URL:
Weblogic Apache Bridge Configuration parameters:
WebLogic Cluster List:
1.Host: '192.168.1.2' Port: 8001 Primary
General Server List:
1.Host: '192.168.1.2' Port: 8001
2.Host: '192.168.1.5' Port: 8001
3.Host: '192.168.1.7' Port: 8001
DefaultFileName: ''
PathTrim: '/weblogic'
PathPrepend: '' ConnectTimeoutSecs:
'10' ConnectRetrySecs: '2'
HungServerRecoverSecs: '300'
MaxPostSize: '0'
StatPath: false
CookieName: JSESSIONID
Idempotent:
ON FileCaching:
ON ErrorPage: ''
DisableCookie2Server: OFF
Can someone please help to shed some light on this? I would be reallygrateful,
thanks!
Jeff
Dimitri--
Dimitri

Deploy Forms and Reports with Load Balancing

I am trying to determine what we need to install here. I have read OracleAS, Web Cache, Application Server, and
Forms documents and have no answer still.
We are currently run 9iAS with Forms and Reports 6i only.
I did not do any of those installs. We are migrating to
Forms and Reports 10g. I need to setup an OracleAS 10g
Forms and Reports application server with the ability to
do Load Balancing over 2 windows Web servers to handle
4,000+ users. The application database will be on its own
Windows server.
Do I need to install the Infastructure, BI, and Web cache?
Or just Oracle 10g Application Server option? Or other?
Do I need to install it on both web servers and do
something like clustering? Do I need to install Web
cache? I just took the 10g AS class and basically did not learn anything about deploying Forms and Reports.
Can anyone give me a place to find the things I need to
install and setup?
Thanks.
Kim

I am a DBA and have not done an iAS or AS installation
before but am now required to learn it. We will be using
SSL and no load balancing hardware. We setup for other
customer sites and setting Windows servers in the past.
We have not done load balancing before.
I am just confused with all the 10gAS options there are to
install to just run 10g Forms and Reports and setup
OracleAS 10g with the load balancing features.
So I just need to install OracleAS Forms and Reports
Server if I am just installing Forms and Reports with SSL.
But if for Load Balancing Oracle 10g I need to cluster
just Reports 10g? I thought I would need OracleAS10g
installed on my two Windows servers and somehow cluster
or let the two know they are the same web page handling
the incoming requests? I do know about Apache redirct. Is
that an Apache feature and is it covered in an Oracle
documentation? They did not cover it in class either.

Safari cannot load balance with https

I am a developer for a web site which runs ASP.NET pages on Windows Server 2003, IIS 6.0. We use Basic Authentication and HTTPS.
We are using a load balancing solution to distribute the load to 4 web servers.
We have been using this setup for over 5 years with IE and Firefox/Mozilla/Netscape browsers.
Recently I have been asked to make Safari browsers work with our site ... MAC, Windows and iPhone versions.
On all 3 platforms I am seeing the same problem ...
The load balancer uses the SSL 3.0 Session ID to determine if the requests to the site are coming from the same client (browser) and thus will ensure that all requests from that browser go to the same web server.
This works fine with IE, Firefox ... it does not work with any version of Safari. When the load balancer gets a request from a single Safari browser session, it sends the requests to multiple servers, causing issues with the pages returned.
If I run Safari with an HTTP debugger ... like Fiddler (where it uses a proxy server) ... Safari works fine.
Some questions:
1. Does Safari expose the SSL 3.0 session id in the same manner as the other browsers ... i.e. an un-encrypted version of the header.
2. Does Safari send many concurrent requests? Firefox and IE limit concurrent requests to 2.
3. Could Safari be timing out it's SSL 3.0 session id frequently or quickly?
4. Is there a reason Safari does not send the http Basic Authentication header with every request once it authenticates with a particular realm?
3. Are there any other possible causes of this problem?
What do you think?

Thank you for your reply.
The session server id is being maintained by Safari and when the connections are kept on a single server (like when I use Fiddler's proxy to connect) it works fine.
The SSL 3.0 Session ID is part of the SSL handshake which is used to establish an https connection. It is established between the browser and the web server as part of encypting the traffic.
As I understand it ... part of the SSL 3.0 protocol is to include an un-ecrypted header along with the encrypted data.
Our load balancing sofware is using a portion of this header (as it is un-encrypted and thus it can read it) to establish when requests are coming from the same web browser. This is the SSL Session ID.
If the Session ID is the same, it will send all traffic to the same web server ... as it knows it is the same web browser.
The problem arises in that the load balancer is not able to indentify requests from the same Safari browser as part of the same secure session.
So I am trying to understand what Safari is doing within the SSL header ... as it is not normally visible to standard web debugging tools ... they only show the http headers.
Unfortunately I cannot easily change out the load balancing software or change it to use session state ids. I am trying to understand how Safari handles this to determine strategies to resolve this issue ... and thus allow my client base to use their Safari browsers to access out service.
What do you think?

Disabling load balancing in WebSphere

Hello,
We've come across this problem just after we deployed our application to a clustered environment (probably a short sight on our part while designing). This is our situation:
Environment: WebSphere 6.1, EJB 2.1
Problem: We use the EJB Timer service for executing some business logic periodically with in our stateless session bean application. We have multiple timers within the same EJB that do stuff dynamically with the same code based on the parameters. However, we don't want the timers to come up automatically when the EJB application (like doing it with in contextInitialized) comes up because we want to bring the timers up and down in a more controlled fashion (more of a business requirement) and so we expose the startTimer and stopTimer methods in our EJB, and we invoke those methods from scripts outside of the WebSphere context as and when needed. This model has worked perfectly in a stand-alone environment. When we switched to our clustered UAT environment and started testing, that's when we got this reality check.
Our cluster consists of 2 nodes, with 4 clones per node, and our middle ware team worked on the horizontal scaling in this environment. So when we try to invoke the startTimer in each of these node clones, it automatically goes to a random clone, not necessarily the one that we are trying to invoke on. And the same happens when we are trying to stop the timer, it tries to stop it on a random clone and the timer might not even be up on the clone it is trying to stop.
So my short question: is there any way to force the EJB invocation to go to a particular clone? In other words, can we disable this whole horizontal scaling and just let it go to the clone we want (not let Websphere come in between with its "smart" load balancing) in our request? Something like a magic parameter that can be passed to the java command while invoking the EJB?
This might sound "impossible" to do it that way and probably better to look at other ways, but we are just looking for something that will not significantly change our architecture at this point in the game.
Thanks in advance!

Answer to my question: http://ieoc.com/forums/p/26385/218976.aspx#218976

Load balancing over rmi requests

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