Using the load balancer

Hi, I just started using the SJWS7.0. When a client sends a request, is the request to the load balancer server name or the admin server name? Any information on how to use the load balancer will also be appreciated

The server where the load balancer is running. The admin server has not play in the load balancing beyond allowing you to configure and manage it using the administration console.

Similar Messages

How to use the Load Balancer Plug-in to serve multiple domains

In SJSAS8.1 SE/EE the asadmin commands that create and maintain a load balancer configuration operate within a domain. When the load balancer configuration is exported an xml file is created that contains all the information for that domain. To make the load balancer plug-in balance the load for multiple domains, the loadbalancer.xml files can be manually merged to conatin the data that is exported from each domain's load balancer configuration.
For example, 2 domains are created, both having a load balancing configuration. After exporting both configurations using the asadmin export-http-lb-config command, the user would then cut and past the cluster information into the single loadbalancer.xml file that resides under the web server's config directory.
An example of the manually merged loadbalancer.xml file follows:
<?xml version="1.0" encoding="UTF-8"?>
<loadbalancer>
<cluster name="domain1">
<instance disable-timeout-in-minutes="30" enabled="true" listeners="http://localhost:1026 https://localhost:38181" name="i1"/>
<instance disable-timeout-in-minutes="30" enabled="true" listeners="http://localhost:1027 https://localhost:38182" name="i2"/>
<web-module context-root="ab" disable-timeout-in-minutes="30" enabled="true"/>
<health-checker interval-in-seconds="5" timeout-in-seconds="60" url="/"/>
</cluster>
<cluster name="domain2">
<instance disable-timeout-in-minutes="30" enabled="true" listeners="http://localhost:1029 https://localhost:38189" name="i3"/>
<instance disable-timeout-in-minutes="30" enabled="true" listeners="http://localhost:1030 https://localhost:38188" name="i4"/>
<web-module context-root="webservice" disable-timeout-in-minutes="30" enabled="true"/>
<health-checker interval-in-seconds="5" timeout-in-seconds="60" url="/"/>
</cluster>
<property name="response-timeout-in-seconds" value="60"/>
<property name="reload-poll-interval-in-seconds" value="5"/>
<property name="https-routing" value="false"/>
<property name="require-monitor-data" value="false"/>
<property name="route-cookie-enabled" value="true"/>
</loadbalancer>
Hope this helps - Mark

Mark, be my savior, I work for SUN as subcontractor at client site. the only one at site ...so I depend on this forum for solutions........
still having trouble failingover to second instance. I have two AccessManagers behind this loadbalancer.
Here is what I saw......
**************LOGS**********************
[20/Jun/2005:14:22:47] failure (15102): for host 128.114.65.13 trying to GET /amconsole/base/AMA
dminFrame, service-passthrough reports: timed out waiting for request body
[20/Jun/2005:14:22:47] warning (15102): reports: lb.runtime: ROUT1014: Non-idempotent request /
amconsole/base/AMAdminFrame cannot be retried.
So I went and updated the loadbalancer.xml (see at the end of the msg). Now I get a different kind of problem...
**************LOGS******************************
[20/Jun/2005:15:25:18] failure (15295): for host 128.114.65.13 trying to GET /amconsole/base/AMA
dminFrame, service-passthrough reports: timed out waiting for request body
[20/Jun/2005:15:25:18] info (15295): reports: lb.runtime: RNTM3003 : Error servicing the request : NoVal
Here is my loadbalancer.xml file...
<loadbalancer>
<cluster name="cluster1">
<instance name="instance1" enabled="true" disable-timeout-in-minutes="1" listeners="http://idm-test-1.ucsc.
edu:80 "/>
<instance name="instance2" enabled="true" disable-timeout-in-minutes="1" listeners="http://idm-test-2.ucsc.
edu:80 "/>
<web-module context-root="amconsole" disable-timeout-in-minutes="1" enabled="true" error-url="sun-http-lber
ror.html" >
<idempotent-url-pattern url-pattern="/*" no-of-retries="3" />
</web-module>
<web-module context-root="amserver" disable-timeout-in-minutes="1" enabled="true" error-url="sun-http-lberr
or.html" >
<idempotent-url-pattern url-pattern="/*" no-of-retries="3" />
</web-module>
<web-module context-root="ampassword" disable-timeout-in-minutes="1" enabled="true" error-url="sun-http-lb
error.html" />
<web-module context-root="amcommon" disable-timeout-in-minutes="1" enabled="true" error-url="sun-http-lberr
or.html" >
<idempotent-url-pattern url-pattern="/*" no-of-retries="3" />
</web-module>
<health-checker url="/" interval-in-seconds="15" timeout-in-seconds="2" />
</cluster>
<property name="reload-poll-interval-in-seconds" value="60"/>
<property name="response-timeout-in-seconds" value="30"/>
<property name="https-routing" value="false"/>
<property name="require-monitor-data" value="true"/>
<property name="active-healthcheck-enabled" value="true"/>
<property name="number-healthcheck-retries" value="3"/>
<property name="route-cookie-enabled" value="true" />
</loadbalancer>
**************************************************************

Using the load balancing on SAP

Hello,
wa have different SAP job chains using ABAP scripts and we would like that this scripts use the SAP application server because they run under DBCI and this is not correct.
We found that the SAP script use a specific "execution target". This should not be so. The execution target should be blank for using load balancing.
In the init jcs file, the parametetr "sheduler_hostname" and "sheduler_fqdn" are positionned with the hostname of the Redwood SAP Agent. Should this be modified ?
thanks.

Hi,
It looks like you have Load balancing enabled from CPS (it is enabled by default). To switch of load balancing go in the Redwood registry in the Redwood Explorer (Configuration->Environment->Registry->PUBLIC->RSI-><SAP instance>) and look for the value at parameter LoadBalancing. You can switch this of (set to N) and restart the RFC agent for this instance. Now the execution target will be left empty.
Regards Gerben

Site not accessible from the Load balanced web front end server - sharepoint 2010

I have a production environment with 2 WFE's(sp-wfe1 & sp-wfe2), 2 APP's and 2 SQL clustered VM's.
2 WFE's are load balanced using hardware load balancer.
An A-Record(PORTAL) is created in DNS for the virtual IP of the load balancer which points to the 2 WFE's.
A web application is created on the WFE's on port 80.
alternative access mapping is configured and the load balanced record "http://PORTAL" is used under the default zone.
Under IIS I have edited the bindings for the sharepoint site at port 80 and added the HOSTNAME as PORTAL.
Result: The site is accessible from outside the server and works fine.
ISSUE: The site is not accessible within the WFE's(sp-wfe1 & sp-wfe2).
When I browse the site from the WFE's server it ask for the credentials and when I enter the credentials and click OK it ask the credentials again and again and in the end displays a blank page.
Kindly help me in this issue because I am clueless and couldn't find anything helpful on the internet.
Regards,
Mudassar
MADDY-DEV Forum answers from Microsoft Forum

Loop back check.
http://www.harbar.net/archive/2009/07/02/disableloopbackcheck-amp-sharepoint-what-every-admin-and-developer-should-know.aspx

BPEL End Point URL using External Load Balancer URL

Hi All,
We have Oracle SOA Suite installed in a clustered environment as per the Enterprise Deployment Guide 10g Release 310.1.3.3.0 E10294-02.
I have deployed a BPEL process to the clustered environment and the end point refers to the internal url of the load balancer e.g. http://internallink:8001/orabpel/default/testService/1.0
When we just paste this end point in a browser, enter the parameters and click on invoke, the BPEL Process gets invoked.
However, if we try to use the external url(which is on https) of the load balancer as the enpoint url eg https://externallink/orabpel/default/testService/1.0 to invoke the same BPEL process, the page which is used to accept the parameters and the used to invoke the BPEL process is successfully displayed. However, when we try to invoke the service, the connection times out.
Please note that internallink and externallink are the internal and external VIPs, respectively.
Does someone have an idea of what may be wrong or what needs to be corrected to be able to invoke the BPEL process using the external VIP, please?
Thanks in advance.

Check if the port of ESB in your server is open.
I think that the port is: 7777
try from ESB server:
wget WSDLURI
if you got the file then the port is closed.

Web Dispatcher not doing the load balancing on the portal

Hi Experts
I am having a production issue where the SAP web dispatcher is not doing the load balancing on the portal.
We have ESS/MSS portal with 1 Message server and 2 Application servers. The Web dispatcher is installed on the message server itself. Here is my Web disp profile file
Profile generated by sapwebdisp bootstrap
unique instance number
SAPSYSTEM = 16
add default directory settings
DIR_EXECUTABLE = .
DIR_EXECUTABLE = F:\usr\sap\<SID>\sapwebdisp
DIR_INSTANCE = .
Accessibility of Message Servers
rdisp/mshost = <hostname>.com
ms/http_port = 8111
#Log and Trace
rdisp/TRACE = 2
SAP Web Dispatcher Parameter
wdisp/auto_refresh = 120
wdisp/max_servers = 100
wdisp/shm_attach_mode = 6
configuration as per SAP note 538405
icm/max_conn      = 7000
icm/max_sockets   = 14000
icm/req_queue_len = 6000
icm/min_threads   = 100
icm/max_threads   = 300
mpi/total_size_MB = 500
mpi/max_pipes       = 14000
wdisp/HTTPS/max_pooled_con = 7000
SAP Web Dispatcher Ports
icm/server_port_0 = PROT=HTTP,PORT=8888
SSL
icm/server_port_1 = PROT=ROUTER,PORT=443, TIMEOUT=60
SAP Web Dispatcher Web Administration
icm/HTTP/admin_0 = PREFIX=/sap/wdisp/admin,DOCROOT=./admin,AUTHFILE=icmauth.txt
wdisp/enable_j2ee_groups = TRUE
wdisp/HTTPS/sticky_mask = 255.255.255.255
In my Web dispatcher Admin page, I see all the three application servers, however the requests are going to only 1 App server. We are using ENd to End SSL configuration for the web dispatcher.
We also have a reverse proxy in the landscape and reverse proxy is forwarding all the requests to the Web dispatcher. In Web disp Admin page>Dispatching Module>SSL End to END dispatching, I see only ONE table entry in the dispatching table and it is our Reverse Proxy.
As all the requests are coming from only one source (Reverse proxy), it seems to me that the sap web dispatcher is forwarding those to the same Application server every time.
Can anyone please advise ?
I also tried to configure logon group in NWA, the web dispatcher is detecting the logon group and all the app servers in the logon group. It still not doing the load balancing.
I would greatly appreciate any help.
Thanks
Viny

Vincent, can you please elaborate more ? Is the web dispatcher not able to recognize stateful and stateless application requests ?
I saw that the procedure for configuring SSL Termination on Web dispatcher is long and complicated and looks like SAP web dispatcher needs to have SSL certificate of its own. As we have no ABAP servers and only Java servers, I can not even create the PSEs using STRUST (as described in SAP help -http://help.sap.com/saphelp_nw70ehp1/helpdata/en/48/99c388d7c46bb9e10000000a42189d/frameset.htm
We already have SSL certificates for Java App servers.
I suppose there should be a way for web dispatcher to identify the incoming requests and forward to appropriate application servers.
Any help is much appreciated.
Thanks
Viny

HTTP logs not created when using software load balancer

This is my setup:
1. I have a server running a software load balancer - call it A
2. There are two servers clustered under A - call it X and Y
3. I am able to access the application deployed on X and Y through A.
Fail-over also works. Shutting down X when the application is up and running routes the requests to Y and vice-versa. All is well until this point.
Problem is:
Let us take server X.
$ORACLE_HOME/Apache/Apache/logs does not have an access log in it. (It
however has an error log.)
Access logs are not created when accessing the servers in the cluster (X and Y) through the load balancer URL.
However, when accessing the individual servers in the cluster (with their URLs), access logs are created.
Specifics on the setup:
1. A, X, Y - all three are OAS 10.1.3.2
2. All three are deployed on individual server machines
3. All three servers have one OC4J instance each running in them
4. The software load balancer used is from WebLogic 8.1sp5 - basically to create a *.war file that has the details of X and Y (servers in the cluster)
5. This *.war file is deployed on A
6. Server A, the one that has the software load balancer, DOES NOT have AS control. One of the other servers in the cluster does.
Has anybody encountered this problem before? Or is there anything wrong
with the setup? What is the resolution for the same?
Any help is greatly appreciated.
Thank you.

Thank you, Jacco. You are right in saying that the software load balancer does not route the request to Apache and hence the logs are not created.
While the logs are not critical to the component we are working on, was just wondering why they were not being created.
As regards your comment on FastCGI, there is a FastCGI directory created under $ORACLE_HOME/Apache/Apache/logs - but there is nothing in it. Neither do the error logs have any information pertaining to FastCGI.
Anyway, I am not going to worry about this issue anymore - may be sometime in the future will try to use a different software load balancer and see if it makes any difference.

The load balancer is not provisioned error when attempting to deploy a SP 2013 App

Hello:
I am in VS 2013 with SP 2013 colocated on same Win 2008 R2 server. I opened a SP 2013 App and directly hit F5 and got this error:
Error occurred in deployment step 'Install app for SharePoint': The load balancer is not provisioned. Verify the load balancer was provisioned successfully before retrieving endpoint addresses. When creating the project, the first screen asks for a
site to deploy to, and I just took the default, which was http://<servername> for the colocated server.
I googled this and could not find a solution. Would anyone have any direction?
thank you
Harvey
Regards, Harvey

Hi Harvey Flaisher,
Based on the error message, this seems to be a service application not working issue.
Please check the ULS log or Event log to check in which service application the error occurs, like BCS, secure store service, app management service, then re-provision the service application using PowerShell command, or re-create the service application
from UI to check the result.
Thanks,
Qiao Wei
TechNet Community Support

ConnectionFactory - who does the load balancing

          Consider creating a connectionfactory (with server affinity unticked, load balancing
          ticked and using the message delivery policy of round robin) we then go on to
          create a distributed domain targetted at the cluster of two managed server's (managed1
          and managed2)
          If I create a simple java app that put's messages to that distributed destination,
          using the connectionfactory above, who's responsible for doing the load balancing.
          Does the client create the session knowing that the connectionfactory requires
          load balancing and thus takes the responsibility for it, or does the client just
          put a constant stream of JMS messages to the WLS and the connectionfactory class
          takes responsibility for the load balancing
          Who maintain's the delivery state, the client application or WLS (i.e who's job
          is it to look up the last messages queue destination?)


Hi Barry,
          A JMS client's produced messages are first delivered to the WL server
          that hosts the client's JMS connection. The JMS connection
          host remains unchanged for the life of the connection.
          Once produced messages arrive on the connection host,
          they are load balanced to their JMS destination.
          For more information I suggest reading the clustering
          sections of the JMS Performance Guide white-paper. You can find
          the white-paper here:
          http://dev2dev.bea.com/technologies/jms/index.jsp
          Tom Barnes
          Barry Myles wrote:
          > Consider creating a connectionfactory (with server affinity unticked, load balancing
          > ticked and using the message delivery policy of round robin) we then go on to
          > create a distributed domain targetted at the cluster of two managed server's (managed1
          > and managed2)
          >
          > If I create a simple java app that put's messages to that distributed destination,
          > using the connectionfactory above, who's responsible for doing the load balancing.
          >
          > Does the client create the session knowing that the connectionfactory requires
          > load balancing and thus takes the responsibility for it, or does the client just
          > put a constant stream of JMS messages to the WLS and the connectionfactory class
          > takes responsibility for the load balancing
          >
          > Who maintain's the delivery state, the client application or WLS (i.e who's job
          > is it to look up the last messages queue destination?)
          >
          >
          >
          >

FRM-92102 when accessing a form using a Load Balancer

Greetings.
We have two oracle application servers version 10.1.2.0.2 on windows 2003 running forms and reports. When just one a server is running everithing works fine, but when I start the second server the clients receive the message "FRM-92102 : A network error has occurred.The Forms Client has attempted to re-establish its connection to the Server 5 times without success.Please check the network connection and try again later" when the first form is called. In our coniguration the F5 Load Balancer is redirecting requests to the Apache ports in both Oas Machines, we are not using the webcache port. I read the note "FRM-92102 When Using A Software Load Balancer With Forms [ID 465583.1]" but this note applies when webcache is used. Our LBR is set using "insert cookie" persitent mechanism.
I have the following questions:
What configuration is needed in OAS files in order to use a LBR and avoid the FRM-92102 error?
How can I debug or trace FRM-92102 issues?
Thanks!
Ramiro Ortiz.

FRM-92102 is the result of the client not getting a response from the server (mid tier). This generally means only one of a couple of things:
1. The mid tier which parented the Forms session is not responding. This could be because it is overloaded, the web server (OHS or WebCache) is failing, or something else is preventing the client from getting a response.
2. Client requests are being routed to the wrong mid-tier server. This is usually the result of improper load balancer configuration or an LB failure. However, generally in this case FRM-92101 would result. If you are using an unpatch 10.1.2 installation, as I believe you are (10.1.2.0) then seeing either error may be possible.
Regarding the note that discusses using Oracle WebCache for load balancing, regardless of whether you are using an Oracle product or hardware or whatever for loadbalancing, the same concept will apply. The load balancer must have session binding enabled. Understanding whether or not this is the problem should be fairly easy to determine. Simply shutdown one server. If everything works correctly, restart the second server. If the problem now occurs, you can likely assume you have a session binding issue and should likely refer to the load balancer's documentation or their Support group.
Also, important to understand is that if the load balancer is designed to alter the header information in any way, the likelihood of failing Forms sessions is high. Forms is expecting very specific information in the header exchange. Some intermediate servers (load balancers, ssl accelerators, firewalls, etc) have been known to intentionally or unintentionally alter the header. Again, contact the vendor.
If you are seeing that the client console is reporting 5 retry attempts, yet you have not set "networkRetries" in formsweb.cfg, this often suggests a critical tcp/ip failure. Often, but maybe not always, the result of a damaged header or other misconfiguration or failure outside of Forms.

How the Load balancing happens in CPO

Hi All,
On what bases the process engine selects the process or request and how the load balancing happens.

Hi!
I am a little confused by the question (as it refers to "request"), but I am going to assume that you are asking how a High Availability Process Orchestrator environment with several servers chooses which processes running on which server.
The answer to that question is...
In general, processes to be executed are split equally between all servers. The only piece of data being taken into account during process instance assignment is the current load on the servers (as counted by the number of top-level processes, not counting child processes). For example, suppose that there are 3 servers in the environment, and server A is running 5 top-level processes, servers B & C are running 3 top-level processes. When new process is started (e.g. on a schedule or manually or triggered via an external event), it will be assigned to either server B or server C for execution, because servers B & C have less load. If under the same circumstances (A:5, B:3, C:3), there are 4 processes started at the same time. When the work is distributed, the total expected work 5+3+3=11 (existing work) and 4 (new work) will be distributed equally with, with servers B&C each getting 2 new processes.
This is a general load balancing algorithms used by the servers in HA environment to decide which server runs which process instance.
There are other factors that come into play, as some processes/activities can only run on server A or server B for technical limitations (e.g. SAP work against a particular SAP System can only be executed from one server in the environment). When those come into play, the work may end up distributed unevenly.
Note that available memory, CPU load, or disk space on servers are not directly taken into account during load distribution.

If equal cost routes exist, OSPF uses CEF load balancing?

Hi All,
Can anyone explain about:
. If equal cost routes exist, OSPF uses CEF load balancing?

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In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Rick is correct, but if his response, with mine, causes any confusion. . .
To OP's original question:
If equal cost routes exist, OSPF uses CEF load balancing?
The answer is technically no, for the reason Rick describes.
But if we rephrase, such as:
Does CEF load balance across multiple equal cost routes generated by OSPF?
The answer would be yes.
I suspect the latter question is what the OP really had in mind, but again, Rick is correct to distinguish that OSPF doesn't use CEF.

FDM keeps give me DCOM Security Error when I configure the Load Balance

Hello, everyone.
I installed FDM on the Windows 2008 Server.
When I configure the Load Balance Server for FDM.
It keeps give me error:
Unable to create Load Balance Manager Object!
Please verify that the user name, password, and domain name are correct.
However, I am pretty sure the user name and password input are correct.
I have tried the solution provides on Oracle Support. And changes the DCOM component's security settings.
However, the issue is still existed.

If after clearning out the security on the DCOM object and attempting to reset the Load Balance Config the same issue occurs, you will need to un-install FDM using the EPM System Un-installer and reboot. Following the reboot you will then choose to install FDM again, configure FDM using the EPM System Configuration utility, and then reset the FDM configuration items.

How to get a server name through the load balancer

Hi.
I'd like to get the server name where is my application installed. There are some servers and clients access there throuth the load balancer. When I try to get it with request.getServerName(), I get the virtual address of the load balancer.
Any suggestions?
Thanks.

Dear Sikindar;
THanks for your cooperation, but I believe that these Tcodes will eb helpful if I know the table name, actually we don't know its name and that's what I'm asking about, how can I get the table name for the ABAPer?
Appreciating your cooperation.
Best Regards;
Lobna

Importing outline using the load utility

Hi all,
I have extracted my outline using the EPMA file generator and the file is a csv file. I'm trying to load it using the load utility and I'm getting this error
"Unable to obtain dimension information and or perform a data load: Unrecognized column header values"
First row in the excell sheet: !Hierarchies=Account
Second Row: Parent, Child, Data storage......
Do I need to change this header...?

Which utility are you trying to load it with? If it is EPMA then you should look at using the EPMA batch client - http://download.oracle.com/docs/cd/E12825_01/epm.111/epma_batch_user/launch.html
Cheers
John
http://john-goodwin.blogspot.com/

Using the load balancer

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