SMLG logon group "looses" instance

Hello
we have a logon group defined, which includes only one instance. Lately it happens that this logon group becomes unavailable for logon. No sessions are broken, only new logons are rejected.
When this happens, in transaction SMLG in Load Distribution, the instance shows response time and number of users 0, and below, where it is shown which instance is currently active for a logon group there is a blank field instead of the instance name.
This is very easily resolved, if we simply click on the instance status above, it gets refreshed, and everything is OK again.
Has anyone had a similar experience, and do you have an idea of what could cause this situatuion?
Thanks
A

Hi Aleksandra ,
There is some problem if you distributing load from cetral intance and local one....
Please change the logon group for central instance...then you need to restart your server to take reflect.
We have similar issue,,, we have change for central instance and restarted.. it works
Hope this will help you.
Thanks
Arun

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Configuring Logon groups for JAVA instances using NWA method

Hello,
we have a BI dual System landscape ( CI ABAP+ JAVA plus 2 dialog instance ABAP+JAVA, based on NW04s. I have set up a Web Dispatcher to do a load balancing for JAVA instances. I configured the logon groups according this documentation using NWA (http://help.sap.com/saphelp_nw04/helpdata/en/45/3dbe11a82b6bf1e10000000a1553f6/content.htm).
The following points are still quite unclear for me:
1. according documentation I should specify the following profile parameters:
[Define the special HTTP URLs, which SAP Web Dispatcher uses to send to the AS Java to retrieve the logon groups information]
wdisp/J2EE/group_info_location = [?] /JavaEE/public/icf_info/icr_groups
wdisp/J2EE/url_map_location = [?] /JavaEE/public/icf_info/icr_urlprefix
Wich values should i take here actually? These one or /J2EE/icr_groups and /J2EE/icr_urlprefix ?
2. Also I have to configure (in visual administrator) the GroupInfoRequest and UrlMapRequest properties of the HTTP Provider service running on server processes. They recommend to use /J2EE/icr_groups and /J2EE/icr_urlprefix. Should it be the same values as defined in those profile parameters?
3. I have defined the instance IDs and exacte Alias in the groups definitions in nwa. Is it possible to proof somehow while using my URL http://<host>:<port>/TestApp~test/<application_resource> either im web dispatcher (traces?) or on a web site on which DI I actually land to be sure that my load balancing works properly and i don't land on my Central Instance?
Thanks a lot in advance for your advices.
best regards,
Polina

Understood, Install the web dispatcher and configre the ABAP Message Server Port and ms/http_port (T-CODE:SMMS). Test this link
http://host:port/sap/public/icf_info/icr_groups
and this would retrieve the list of ABAP (SMLG) cofigured groups.
For java load balancing, icm of that host will send the incoming requests to JAVA Dispatcher. The load balancing happens on the basis of server nodes and can be found in the web dispatcher session dispatching table.
There are no necessary parameters required for java load balancing except the number of server nodes you'll hookup to that dispatcher.
There is an option called service based, where we configure the j2ee hosts to accept the connections for the services which are running but I haven't seen much customers using this option.
Bottom line: No changes are required for java side and enable the "ext rfc" option for abap logon groups and rest will be taken care by Web Dispatcher.
Use connection pooling and high timeouts to acheive the better througput and use the SSL termination on Web Disp.

Logon groups configuration for JAVA instances using NWA method

Hello guys,
we have a BI dual System landscape (CI ABAP+ JAVA plus 2 dialog instance ABAP+JAVA, based on NW04s. I have set up a Web Dispatcher to do a load balancing for JAVA instances. I configured the logon groups according this documentation using NWA (http://help.sap.com/saphelp_nw04/helpdata/en/45/3dbe11a82b6bf1e10000000a1553f6/content.htm).
The following point is still quite unclear for me:
I have defined the instance IDs (of DIs installed on linux servers) and exacte Alias in the logon groups definitions in NWA. Is it possible to proof somehow (while accessing my URL http://<host>:<port>/TestApp~test/<application_resource> ) either in web dispatcher ->Web Administration Interface(Application Server Monitor ?) or somewhere else on which Dialog Instance I actually land to be sure that my load balancing works properly and i don't land on my Central Instance?
Thanks a lot in advance.
best regards,
Polina

ok, I have understood what you ment in the first passage Thanks!
When I put javascript:document.cookie in my Internet Explorer Address Bar i got the following information:
PortalAlias=portal; saplb_STD_JAVA=(sapt20p_T20_20)207175450; JSESSIONID=(sapt20p_T20_20)ID1892984750DB11747115157906231437End; saplb_test=(lx003207_T20_20)206509050; saplb_*=(lx003207_T20_20)206509050
what does here saplb_STD_JAVA mean?
you can use following URLs to access any particular Java Server node of any server.
https://<host name>:<https port>/irj/portal;saplb_*=<Java serer node number> https://<host name>:<https port>/irj/portal;sapj2ee_irj=<Java server node number>
What is the difference between saplb_* and sapj2ee_irj?
Thanks in advance.
regards,
Polina

How can I rise limit of number of users on an server in logon group (SMLG).

Hello
How can I rise limit of number of users on an server in logon group (SMLG).

In that case, you have not done your Sizing correctly. If users are more on all the Servers, then your performance is hampering, which is leading to delay in Response time.
So the first course of action is to proper gathering of logging of users & as per that, you need to increase app server.
Also check out how the Operation modes has been divided...if Dialog users are more & BGD users are less in Morning time (IST) for example you can have Switching of Dialog users by which your processes are occupied more for Dialog users, therefore more no of users can log in & vice-versa.

Scheduling background job on Logon group

Hi All,
We have 4 logon groups configured in SMLG, while scheduling the job in SM36 ->Target server field i am able to see only one group and other indivdual servers not all the Groups configured in SMLG.
Is there any option i have to check to let all the groups configured in SLMG to diaply in SM36 for scheduling so that i can select the Logon group. I tried giving the logon group names manually which are not listed in Target server field it's giving the error group not exist..
Please suggest..how to make all the Groups configured in SMLG to get displayed in SM36 for scheduling jobs...
Thanks,
Subhash.G

Target server field is Name of an SAP instance at which a background job should be run. The name has the following format: <host name>_<SAP System name>_<SAP System number>, where host name is the name of the server computer on which the instance is running, as specified in the system profile parameter SAPLOCALHOST.
The name of each instance is specified in the system profile parameter rdisp/myname.
Example: hs0123_C11_55
In programming: As the table field EXECSERVER, shows the target instance selected by the user for running a job. As the table field REAXSERVER, shows the SAP instance at which a job was actually run.
Hope this is clear.
Thank you,
Shyam

How to create Logon groups for JAVA Systems

Hi,
I am implementing an BI JAVA Landscape. We do have 1 Central Instance(CI) and 2 Dialog Instances (DI) JAVA Standalone. Everything based on NW04s
I have set up a Web Dispatcher to do a load balancing. The Web Dispatcher is connected to the Message Server (MS) of the JAVA CI to get all the information about the Engines.
I am now looking to create Logon groups to distibute the load according the application used applications. I am not sure if there is a possibility to set up logon groups (server groups) directly somewhere in the J2EE engine, or if I have to set this up in the WebDispatcher konfiguration files?!
Thanks in advance and best regards,
Dominik

We're trying to do something similar with NetWeaver CE 7.1.
According to [this documentation|http://help.sap.com/saphelp_nwce10/helpdata/en/45/3dbe11a82b6bf1e10000000a1553f6/frameset.htm] there are 3 steps to doing this for NetWeaver CE 7.1:
1. Logon Groups
2. Web Dispatcher profile changes
3. HTTP Provider property changes
We've set up a Logon Group in the NetWeaver nwa and associated the two instances (one host) with it.
"[Configuring Logon Groups Using Configuration Files|http://help.sap.com/saphelp_nwce10/helpdata/en/45/3c3f0cad9f4c2de10000000a1553f6/frameset.htm]" says: "...to create the files using HTTP Provider service."
There it doesn't say exactly how to generate those 3 text files; it says: "1. Create the icrgroups.txt and urlinfo.txt files that define the logon groups. For more information, see the documentation of SAP Web Dispatcher." ; but, has no link to what it says to see. So, I manually go to ["SAP Web Dispatcher", "Assigning Logon Groups"|http://help.sap.com/saphelp_nwce10/helpdata/en/b4/9aa8862e714e6db8e74e48e5d3283b/frameset.htm]. But, it all pretty much breaks down there because it's referring to apparently non-NetWeaver CE 7.1 stuff (as near as I can tell); for instance, how do the transactions SMLG and SICF relate to NetWeaver CE 7.1, or am I in the wrong place?
I tried to press ahead with files similar to the examples here, but I hit this error in the Web Dispatcher:
[Thr 5132] *** WARNING => ICT: path prefix /Curam/ not allowed in this context. Only prefix / allowed. [ictxxptab.c 764]
[Thr 5132] *** WARNING => When a file is specified in wdisp/J2EE/url_map_location only URL prefix '/' is supported. See also SAP note 1033470. [icrxx.c 2925]
The note reference looks hopeful, but I cannot read it; I get:
Note 1033470
The requested SAP Note is either in reworking or is released internally only
Does anyone have a copy of this Note or knows if it's helpful?
Has anyone done this with NetWeaver CE 7.1?
Tahnks,
William

SAP Portal J2EE logon groups

Please can you help.
Within ABAP you can go into SMLG and configure logon groups so you can separate user groups to particular application instances.
I would like to do the same within NW Portal and CE. We have external and internal users accessing the portal (NW 7.0) I have web dispatchers to load balance across application instances however is it possible to create logon groups and dedicate dedicated application instances to these user groups. I have read that you able to do this however the user groups would require different URL's and then the Web dispatcher can filter the URL and assign it to the relevant Java logon groups. The requirement which I have is that I am unable to change my URL so external and internal users use the same URL.Please note I only have 1 set of Portal Web dispatchers. The Web dispatchers serve both internal and external users. Also for extra information my portal mainly calls Web Dynpro code from CE. CE also has Web dispatchers as I have more than 1 CE app server. I assume if it is possible my requirement would also be to create logon groups within CE so external users use certain EP app servers and CE app servers and internal use other EP app servers and other CE app servers.
EP is version 7.0
CE is version 7.2
WD is version 7.3
Any help and advice would be appreciated.
Thanks
Ajay

Hi Arjun,
Thanks - I know how to make the logon groups in Java however I don't want to use different URL's for alias.
I have 1 URL for example jo.blogs.com/irj/portal which both my internal and external users use.
Is there any way I can make use of the logon groups without having to give my users 2 seperate different URLs.
Thanks
Ajay

Logon groups not visible/usable

Hi,
I'm experiencing problems with using logon groups for load-balancing connections to my NSP 7.01.
Ultimately I want to create a JCo Connection from my CE 7.1.1 to the ABAP system and CE forces me to use a load-balancing connection using a message server and a logon group. But in order to test the proper configuration of my ABAP system, I'm simplifying the scenario but just attempting to log on to the system via Sapgui with load balancing.
Here's my setup:
It's a local scenario where both Sapgui and the AS ABAP reside on the same server.
The system has SID NSP and SysNr 02.
The proper services (sapmsNSP 3602/tcp plus sapdp02, sapgw02) and hosts entries are present on the server.
Everything else works fine
The instance knows itself as tron7661_NSP_02 (I had to correct some errors in the standard installation
Profile file NSP_DVEBMGS02_TRON7661 contains: rdisp/enqname = tron7661_NSP_02, rdisp/myname = tron7661_NSP_02
In transaction SMLG, I created a logon group HUGO, assigning instance tron7661_NSP_02 with attribute "Ext. RFC enabled" = true and everything else left blank.
When I press the "Test" button, I get message "Internal error (SIMULATION:INACTIVE_SERVER)" (Message no. RZ783). I can confirm and save anyway. A green LED is displayed in the "Status" column for my logon group.
After restarting the server, I would expect the new logon group to be usable when creating a new entry in Saplogon.
In Saplogon, I choose "Create new entry", connection type "Group/Server Selection", and enter the host name of my message server TRON7661.
As a result, a single entry "tron7661 (tron7661_NSP_02, DIA UPD ENQ BTC SPO ICM)" appears in the field "Group/Server".
This entry represents not a logon group, but a single application server.
(When I try this for other SAP systems and message servers in my landscape, I always get the logon groups configured for this systems plus an entry for the application server.)
Do you have any idea what might be wrong here?
Thank you and best regards,
Thorsten
P.S.: I have found and reviewed thread /message/208613#208613 [original link is broken] but found nothing helpful in it.

Hi Raja,
Thank you very much! -- Thomas' blog solved my problem. It was in fact just a matter of running the report that makes the configured logon group usable.
Best regards,
Thorsten

Regarding Logon Groups

hi friends,
                can any one please solve this problem for me?,
In my EP 6.0 system i configured the SLD and I created the Jco destination,when i tested it it's giving error like"ERROR:Logon Group PUBLIC not found"
can u please where can i get the logon group?.

Hi,
*You can find that option by logging into SLD " Log on to SDL through portal i.e. http://<servername>:<portnumber>/sld"*
Follow these steps below then.:-
It might sometimes happen that Message Server and Logon Group is not configured to configure them, follow the process
For Message Server:
          i.            Log on to SDL through portal i.e. http://<servername>:<portnumber>/sld
          ii.            Choose Technical System. Click it.
          iii.            You will observe New Technical System button, click it.
          iv.            System Type: Select Web AS ABAP , if you want to connect to R/3 System and incase you are using Java application use Web AS Java
          v.            General: Log on to R/3 System through SAP Log on pad. Go to System à Status, check for SID, Installation Number and Database Host Name.
          vi.           Central Servers: Give Host Name and Port Number and Instance Number.
For Logon Group:
         a.            Click on Add New Logon Group, this will open a row in the table.
         b.            Log on to R/3 through Logon pad and get Logon Groups ids and the transaction code is "SMLG".
         vii.            Application Servers: Click on Add Application Server and then give Host Name and Instance Number of R/3 System.
         *viii.           *Clients: Give Client number (System id) and Logical Client Name (which we can get from SMLG code). And click finish.
Hope this helps.
Regards,
Shailesh Nagar

Set FQDN in Logon Group

Hi Gurus,
In SMLG - Maintain Logon Groups, is there possible to set fully qualified domain name (FQDN) instead of IP address to Logon Group?
This is because if I only set the Public IP for this Logon Group, internal user in LAN is not able to use this Logon Group to access R3.
Anyone has any idea? Please help.
Thanks,
HauChee

Hi Hau,
(Sorry if Hau is not your first name !)
It is not possible to enter a FDQN as the help is :
IP address
(Numeric) IP address of the application server. This should be specified only if the application host belonging to the instance has to be addressed from the frontend side using a different IP address than that used for communication within the application host. This could be the case if, for example, the communication from application host to application host uses a different network than that used for the communication from the frontend to application host
I think you need the 2 different saplogon groups AND you need to find a way from the portal to check if the laptop is connected internally or externally. The portal would then choose the right saplogon group :
Also, I don't really understand the need : I think it would be much nicer for your users to use directly sapgui when connected internally than webgui.
webgui, IMHO is just an acceptable way to work when not in house.
Regards,
Olivier

Configuartion of logon group !DIAG for use by web dispatcher

We are load balancing our HTTP traffic across a range of ABAP+Java Addin instances and have found that the load is balanced according to the logon group !DIAG. Does anyone know if is possible to configure this group (ie to remove the CI) or how to use a different logon group.
I think you can do something with URL mapping in SICF, but do not know how to configure it.
Regards
Jack Inniss.

Hi Jack
The internal server group !DIAG is made up of all application servers defined in SMLG, I believe. The web dispatcher uses the ICF service /sap/public/icf_info to determine the content of this group in conjunction with URL mapping.
If you exeute this service you'll see the list of servers and logon groups that will be used for the !DIAG group. Is the CI defined in SMLG ? Also, you may find the following page on SAP Help useful.
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/a8/a8463c53a0ff02e10000000a114084/frameset.htm">Server Groups in the Internet Communication Framework</a>
Regards,
Gary

Create a logon group as Message server

Hi,
please explain me with steps for how to create a logon group as Message server usage for few jco destination is must.

Hello Kishore ,
To create or assign Logon group for Jco connection use Tcode SMLG :
Create a group name e.g PUBLIC and assign the instance profile of central instance and Dialog instance.
You can create Logon group or assign existing logon group into Jco destination.
Regards ,
Santosh Karadkar

Purpose of creating Logon groups

Hello,
plesae tell me What is the purpose of creating Logon groups ?
Thanks,
Teja

Hi Teja
LOGON GROUPS, as it's name specifies it allows us to divide the total number of logons into some groups, so as to share the workload
Logon load distribution allows dynamic distribution of the SAP users to application server instances by setting up multiple logon groups that consists of one or more application instances.
Every application server group is assigned maximum threshold values for the response time and the number of users that can log on to a particular group server. Especially important logon groups with time-critical transactions can be assigned to application servers with improved response times.
The process of defining the logon groups is:
u2022 Choose CCMS > Configuration > Logon Groups. Alternatively, call Transaction SMLG.
You can configure the logon groups as:
http://help.sap.com/saphelp_nw04/helpdata/en/c4/3a64b4505211d189550000e829fbbd/content.htm
after configuring these logon groups, users are asked to create sapgui entries, so as to make them to login into SAP as per logon load balancing
http://www.cmich.edu/documents/SAP/pdfs/Setting_Up_SAP_Logon_Groups.pdf
thanks
Bhudev

Specific logon Group for Http logins

Hi
I just wondering whether we can have Logon group in SMLG specifically for http logins to use only 3 app server out of 6.
In my case,we have given one of the app server in the Iviews so all http logins goes to it, But as I see this server is idle most of the times and my other app servers are overloading and hanging sometimes so to allow GUI users on this and distribute http logins to use only 3 servers.
And If I use the generic load balancing then all the request would come to Central instance and then go to app server,which I don't want because I restricted any users login to central instance .so What I am looking is, to distribute Http logins to 3 app servers only .
Can this be acheived???
Any ideas are welcome.
Thanks

Hello,
you can create a logon group in SMLG with those 3 application servers, then set the flag ""Ext. RFC-enabled" in SMLG.
If you use the Message server for Http load balancing you should activate the services sap/public/icf_info/logon_groups and sap/public/icf_info/urlprefix in SICF transaction.
You could as well assign specific logon groups to url's in transaction SICF.
There are some restrictions when using the message server for Http load balancing (depending of your scenario), see SAP Note 1040325. That's the reason is recommended to use SAP Webdispatcher
http://help.sap.com/saphelp_nw04/helpdata/EN/de/89023c59698908e10000000a11402f/frameset.htm
Kind regards,
Mercedes

Send Idoc's to R/3 System with logon group

Hello everybody,
I have the next scenario
Sender R/3 Idoc -> XI -> Receiver R/3 Idoc
now I have a doubt, the receiver system has a logon group, is there any benefits for me in XI to use the logon group to send the Idocs to this system?, and if it's better to use logon group how can I use it, juts by defining the RFC that exists in SM59 that points to the receiver R/3 system in XI as load balancing and pointing to the logon group????, thanks in advance for your answers.

Julio,
Yes you are right, load balancing can be achieved using logon groups in the RFC destination for the IDoc adapter. It basically enables the ABAP dispatcher to decide whats the best available application server to process the inbound message sent by PI.The purpose is to load-balance successive connections across a group of ECC application servers.
To do this a connection is established through the message server (the central ECC instances communication process) to determine which ECC instance is to handle the RFC call.
The key parameters here are:
u2022     the hostname, on which the message server process runs,
u2022     the system name of the ECC central instance, and
u2022     The logon group, which indicates the cluster of applications servers that an ECC instance will be selected from, to serve the request.
Greetings,
Gerardo.

SMLG logon group "looses" instance

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