Load balancing error 88: Cannot connect to message server (rc=9)

Hi,
We are facing a problem in the system object.
initially we created a system object with loadbalancing template ,and everything worked fine, but after couple of months we found a error "Load balancing error 88: Cannot connect to message server (rc=9)", so we have created a Dedicated application server object which resolved our issue.
My question is why has this problem occured, and since my client side has lot number of users and we wish to keep the system back to load balancing object.
How can i make my system object work back, what might be the causes?
Thanks
Srivastsa Kondapally

Load balancing only works if the message server is available and the logon group specified exists as well. If one of those changes, then it will break until you get the values set correctly.

Similar Messages

Logon balancing error 88: Cannot connect to message server(rc=9)

HI.
I AM USING R3 ECC 6.0
PLZ HAVE A LOOK ON BELOW IMAGES.
IN VM WEAR I HAVE INSTALLED THE ECC
THROUGH THE WINDOWS 7 I AM LOGIN ECC 6.0
EVERY TIME WORKING
BUT RECENTLY I BOO MY PC WINDOWS 7
BUT IF I TRY TO RUN THE SAP LOGON
ABOVE ERROR MESSAGE IS COMING.
I SEARCHED IN NET.
SOME BODY SUGGESTED THAT I NEED ADD ONE LINE AT SERVICES. FILE...(PLZ HAVE A LOOK ON 2 IMAGE)
IS IT CORRECT TO ADD THE LINE..
CAN I ADD THIS LINE
SAPMS<SID> 3600/TCP
ABOVE ONE IS CORRECT OR NOT ...
WHERE CAN I ADD IN VM WEAR SYSTEM OR IN WINDOWS 7 SYSTEM.
AND ALSO I AM HAVE ONE MORE DOUBT.
PLZ HAVE A LOOK ON 2 IMAGE..
I AM HAVING 2 SERVICES. FILES..
I NEED YOUR VALUBALE SUGGESTIONS..

Hi,
Please change the <SID> of SAPMS<SID> to the real SID of the target system.
For exmple, if the SID is ABC, then "SAPMSABC 3600/TCP"
And about the port, actually the port should be 36<nn>.
So please find the instance number of your message server.
For example if the instance number is 00, then "SAPMSABC 3600/TCP"
if the instance number is 10, then "SAPMSABC 3610/TCP"
Hope this helps.
Best regards,
Shuai

Logon balancing error:cannot connect to message server (rc=9)

Hi Gurus,
I have just installed SAP GUI 710 in my new system and copied the saplogon.ini file to the respective folder in the new system.
I am now able to see the servers in the logon pad but not able to login .
When i try clicking the logon i am getting the below error message "
"Logon balancing error:cannot connect to message server (rc=9)"
Then further expanding the message i am getting the below message
" Error: Server '?' unknown
Tue Mar 02 11:51:05 2010
Release 710
Component NI (Network Interface), Version 39 rc =-3 , Detail NiErrSet. "
Can you please help me out in accessing the servers.
Regards
Vikram

Check OSS Note : 882741
Summary
Symptom
Some users cannot longer connect SAP GUI to any SAP systems e.g. via SAP Logon, SAPShortcut etc. although they have not made any update to either SAP GUI or SAP system. The attempt to connect to the SAP system ends with error messages like this: "Logon balancing error: could not connect to message server (rc=9)", "service sapmsXXX unknown" or "service sapdp## unknown".
The detailed error information is as follows:
    Error: service 'sap...' unknown
    Component NI (network interface), ...
    rc = -3, module ninti.c, line 463
    Detail NiPGetServByName: service 'sap...' not found
    System Call getservbyname
Other terms
service sapmsXXX unknown,logon balancing,service sapdp## not found error,etc/services,drivers\etc\services,getservbyname, sapdpxx
MSN Messenger 7.5,Connection Troubleshooter
Reason and Prerequisites
The reason for this malfunction is, that the datatype of the registry value HKLM\System\CurrentControlSet\Services\TCPIP\Parameters\DatabasePath
was changed from REG_EXPAND_SZ to REG_SZ.
The following programs are currently known to cause this registry change:
Starting MSN Messenger 7.5 "Connection Troubleshooter" (Build 7.5.0299).
Installation of MSN Messenger 7.0 or MSN Messenger 7.5 with the option automatic scanning and configuration of ports.
This modification prevents the expansion of environment variables in the value of the parameter. Therefore,
      %SystemRoot%\system32\drivers\etc
is not translated to
   c:\windows\system32\drivers\etc
and the services database is not found by the API function getservbyname().
If you have checked the datatype of registry value DatabasePath and it is REG_EXPAND_SZ, apply SAP Note 52959 to check the appropriate settings in the services file.
Solution
Start the registry editor and rename the registry value HKLM\System\CurrentControlSet\Services\TCPIP\Parameters\DatabasePath
Create an Expandable-String Value (REG_EXPAND_SZ) with the same name and value.
If more PCs are affected, you can export the correct value to a .reg file and import the .reg to other PCs.
If you have the same problem although you have not installed Microsoft MSN Messenger 7.5, create a customer message, collect the following information and attach it to the message according to note 541726 or upload it to sapservX (see note 40024):
Scan your workstations for spyware and viruses with up-to-date virus definitions. If you already did that what was the result ?
What software has been installed recently ? (client software, Firewall)
Create a registry export of the following key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstallon the affected and the unaffected PC respectively and attach the two .reg files to the customer message.
Are the users on the affected workstations logged on with administrative credentials (local administrator ) ?
Create an MPS Report Networking and Setup Perf of an affected workstation so that we can check if they use an software in common.
You can download the Networking MPS Reporting Tool at:
http://download.microsoft.com/download/b/b/1/bb139fcb-4aac-4fe5-a579-30b0bd915706/MPSRPT_Network.exe
You can find a short description about the features of the tool at:
http://download.microsoft.com/download/b/b/1/bb139fcb-4aac-4fe5-a579-30b0bd915706/MPSRPT_Network_Readme.txt
The Setup Perf MPS Reporting Tool is located at:
http://download.microsoft.com/download/b/b/1/bb139fcb-4aac-4fe5-a579-30b0bd915706/MPSRPT_SETUPPerf.EXE
Run this report too on identically configured workstations, which are not affected.
If you have already changed back the DatabasePath parameter and if after a while the value was switched back to REG_SZ perform the following steps to help us to identify the reason for this problem:
Switch the datatype back to REG_EXPAND_SZ
Download Regmon from http://www.sysinternals.com on the affected machines
Enable auditing on the affected clients
Modify the settings of the eventlog so that no important entry is deleted!
Open Regedit and highlight HKLM\System\CCS\Services\TCPIP\Parameters
Right-click on "Parameters" and choos "Permissions" and click "Advanced".
Choose "Auditing" and "Add".
Add "Everyone" and select "this key only" under "Apply onto".
Check the boxes "Set Value" and "Delete" and click "OK".
Apply these settings
Start Regmon and apply the correct filter settings:
Press the "magnifying glass" button to stop the monitoring.
Press the rubber button to delete all logged entries.
Go to "Options Filter/Highlight".
Copy the following value to the include field: tcpip\parameters\databasepath and click "Apply".
Start Regmon by pressing the magnifying glass button
Verify that logging starts when you double-click the TCPIP Key in regedit!
If the datatype will be changed again, provide us the output of the monitoring tools.
Solution provided by Microsoft
This issue is said to be fixed as of build 7.5.0311 of MSN messenger.

Cannot connect to message server

Hi,
I have integrate a BSP Application from a sap ERP system in my portal !
After I checked this BSP, my ICM from my SAP ERP system failed : Server Overload !
I tried to restart the SAP system and know I have this error in the mmc :
disp+work.exe Running but not connected to Message Server !
In my dev_disp file :
DpJ2eeStart: j2ee state = STARTED
rdisp/http_min_wait_dia_wp : 1 -> 1
***LOG CPS=> DpLoopInit, ICU ( 3.0 3.0 4.0.1) [dpxxdisp.c   1617]
***LOG Q0F=> DpLoopInit, nomstry () [dpxxdisp.c   1704]
ERROR => Connection to Message Server failed - check installation [dpxxdisp.c   1705]
In my std_server0.out :
Framework started for 151840 ms.
SAP J2EE Engine Version 7.00   PatchLevel is running!
PatchLevel March 04, 2006 16:23 GMT
>
Login :
SAP J2EE Engine Version 7.00   PatchLevel is shutting down! PatchLevel March 04, 2006 16:23 GMT
Stopping services.
Service jmsconnector stopped. (0 ms)
Service sld stopped. (0 ms)
Service com.adobe~TrustManagerService stopped. (31 ms)
Service com.adobe~DocumentServicesConfiguration stopped. (16 ms)
Service tcsecwssec~service stopped. (0 ms)
Service tc.CBS.Service stopped. (0 ms)
Service com.adobe~DocumentServicesDestProtoService stopped. (15 ms)
Service pmi stopped. (47 ms)
Service tcsecvsi~service stopped. (0 ms)
Service tcsecdestinations~service stopped. (0 ms)
Service tcsecsecurestorage~service stopped. (0 ms)
Service adminadapter stopped. (0 ms)
Service monitor stopped. (20000 ms) - Timeout expired.
Service com.adobe~LicenseService stopped. (0 ms)
In my std_dispatcher.out
Framework started for 46754 ms.
SAP J2EE Engine Version 7.00   PatchLevel is running!
PatchLevel March 04, 2006 16:23 GMT
>
Login :[ParNew 159114K->11211K(557952K), 0.3431082 secs]
[Full GC[Unloading class sun.reflect.GeneratedMethodAccessor17]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor5]
[Unloading class sun.reflect.GeneratedMethodAccessor15]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor12]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor2]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor8]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor9]
[Unloading class sun.reflect.GeneratedMethodAccessor5]
[Unloading class sun.reflect.GeneratedMethodAccessor24]
[Unloading class sun.reflect.GeneratedMethodAccessor14]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor11]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor3]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor10]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor7]
[Unloading class sun.reflect.GeneratedMethodAccessor10]
[Unloading class sun.reflect.GeneratedMethodAccessor11]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor4]
[Unloading class sun.reflect.GeneratedMethodAccessor3]
[Unloading class sun.reflect.GeneratedMethodAccessor7]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor1]
[Unloading class sun.reflect.GeneratedMethodAccessor21]
[Unloading class sun.reflect.GeneratedMethodAccessor25]
[Unloading class sun.reflect.GeneratedMethodAccessor20]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor13]
[Unloading class sun.reflect.GeneratedMethodAccessor12]
[Unloading class sun.reflect.GeneratedMethodAccessor26]
[Unloading class sun.reflect.GeneratedMethodAccessor6]
[Unloading class sun.reflect.GeneratedMethodAccessor29]
[Unloading class sun.reflect.GeneratedSerializationConstructorAccessor6]
[Unloading class sun.reflect.GeneratedMethodAccessor22]
[Unloading class sun.reflect.GeneratedMethodAccessor28]
[Unloading class sun.reflect.GeneratedMethodAccessor9]
[Unloading class sun.reflect.GeneratedMethodAccessor27]
[Unloading class sun.reflect.GeneratedMethodAccessor23]
[Unloading class sun.reflect.GeneratedMethodAccessor13]
[Unloading class sun.reflect.GeneratedMethodAccessor8]
[Unloading class sun.reflect.GeneratedMethodAccessor16]
11211K->10224K(557952K), 0.5038284 secs]

Can you help help me, please.
Thank you.
Best regards,
Mathieu

Java add-in cannot connect to message server

I'm installing a Java add-in to an ABAP system (NW 2004s). During the start of the Java Engine, the processes cannot be started. When I look al dev_jcontrol, I see this:
Thr 2860] Sun Jul 30 19:59:45 2006
[Thr 2860] ***LOG Q0I=> NiPConnect2: connect (10061: WSAECONNREFUSED: Connection refused) [nixxi.cpp 2764]
[Thr 2860] *** ERROR => NiPConnect2: SiPeekPendConn failed for hdl 2 / sock 1740
     (SI_ECONN_REFUSE; I4; ST; <IP-ADDRESS>:36) [nixxi.cpp    2764]
[Thr 2860] *** ERROR => MsIAttachEx: NiBufConnect to /36 failed (rc=NIECONN_REFUSED) [msxxi.c      652]
[Thr 2860] *** WARNING => Can't attach to message server (/36) [rc = -100]-> reconnect [jcntrms.c    368]
It seems that JControl tries to connect to the message server on port 36. Where can this be corrected?

Discovering this thread when I had the same problem (with port number 36 not the 3901) I was frustrated to see no posted solution. So now that I have solved it, here is my solution:
Cause
=====
The J2EE add in adds a number of parameters to the default profile - however it does not import these into the database version of the profiles in RZ10. Hence if you modify a parameter in the DEFAULT.PFL using RZ10 and activate it without first doing a "Import Profiles of Active Servers" the parameters added by J2EE install dissappear.
Solution
========
In my case, I just compared the DEFAULT.PFL.BAK file to DEFAULT.PFL and readded the missing entries - incase people have lost there BAK file, here are the entries I needed to put back in (note your port numbers and instance numbers may differ):
SAP Central Service Instance for J2EE
j2ee/scs/host =
j2ee/scs/system = 01
j2ee/ms/port = 3901
j2ee/dbtype = ora
j2ee/dbname = BWP
j2ee/dbhost =
Restart the instance and magic! It works.
Regards,
Jason Currey

Can't open file ... error msg "cannot connect to DDE server"?

I can't open my pdf files from Outlook or just open Acrobat. If it does open, it says Acrobat failed to connect to DDE server? I'm using Acrobat Pro 9.3, I think as it updated. I have Win7 with current updates on a new Sony Vaio laptop.
I looked at the other msgs but I am using Norton Anti-Virus not the one mentioned. I am upgraded to Win7 and IE8. All worked ok before switching to new computer and in starting to use Win7 & IE8.
Thanks!
Sherry
Message was edited by: lilbur
Message was edited by: lilbur

See http://forums.adobe.com/message/5641417#5641417

Error 948 - cannot connect to (dpm server)

A little history 1st:
I am new to System Center DPM, having signed on to a company that uses it on a short term contract.
I was tasked with getting the remote administration working for DPM and accomplished that with no difficulties other than determining that I had to run the launcher as administrator - what apparently the people here did not think of.
This has been working for weeks since I got it set up, now it does not work.
No updates have been applied to either the server or the Windows 7 machines that have had no problems until a couple of days ago.
Now I get the above error.
I can RDP into the server and bring up the console with no problem.
I have verified that there is network traffic between the 2 machines after I run the launcher as an administrator and after a reboot and none before.
Thanks,
Brad
Does anyone have any suggestions on where to look for the problem?

Hi
2 threads you can look at:
http://social.technet.microsoft.com/Forums/en-US/06b61911-61ad-41fc-810a-20c2cd0c6cf1/dpm-2012-remote-administrator-console-wont-keep-the-dpm-server-saved?forum=dataprotectionmanager
http://social.technet.microsoft.com/Forums/en-US/888799e6-53b9-4ce7-b9aa-966725b4b146/dpm-2012-remote-administration-windows-7?forum=dataprotectionmanager

Load balancing error 88

Dear all,
We are suddenly facing a problem in the PRD system. There user are getting the below error and if they restart there system than it is solved
Load balancing error 88: Cannot connect to message server (rc=9)
few days back We have upgrade the system from ecc5 to ecc6 and its only
Please suggest why the error is coming and how to solved it
Regards,
Kumar

check the /etc/services file for a proper port setting for the R/3 message server "sapms<sid>" at 36xx. You can try connecting the SAPgw directly to the dispatcher at port 32xx where XX is the instance number. If that connection is good, then it appears to be a logon load balancing configuration problem which uses the message server.
This is usually because it cannot connect to the message server. Please check the dev_ms for any errors. if it is intermittent it is likely to be a network problem ( see note 500235 Network Diagnosis with NIPING.
Check following SApnotes :
#n21559: Examination of SAPGUI problems could be useful.
Please also check the note 882741 for the more info about this problem.
following links will help you :
Logon Load Balancing
http://help.sap.com/saphelp_nw70/helpdata/EN/c4/3a64c1505211d189550000e829fbbd/frameset.htm
Message Server-Based Logon and Load Balancing (Redirection)
http://help.sap.com/saphelp_nw70/helpdata/EN/43/a95d83e27417b9e10000000a1553f6/frameset.htm
Best Regards
Niraj

Logon Load Balancing error

Hi
I am trying to setup Logon Load Balancing for our ERP system, I have setup the logon groups in TX SMLG, the landscape consists of DB server app1 and app2, I have created a logon group for app1 and logon group for app2, I have then created a new system entry in the SAP Logon Pad under Group/Server Selection, here I have a problem in that when I enter the message server I get a message saying Error: hostname <message server> unknown, however when I enter the ip address for the message server I get the list of logon groups appear, however, I have entered the sapmsS02 3600/tcp setting within the services file, I have also added the ipaddress and the hostname of the message server into the hosts file, but I still cannot get the hostname to work within the message server. When I test the logon I get the error message Logon Balancing Error 88: Cannot connect to message server (rc=9), I have searched the net and most people just suggest entering the details into the services file and host file, also a sap note which suggests issues within the registry for Microsft MSN which I have checked and still have the same issue.
Does anyone have anymore ideas as to what this could be or what to try next?
Thanks for your help
Jay

Dear Jay,
It is not the service that can not be resolved, that is translated into an IP address, but the hostname. It depends on your system and the way in which it does hostname resolution, whether the hosts file will be used at all. So please check with the keyword 'hostname resolution' on how to set this up on your landscape.
Best Regards,
Tim

Load balancing error while log on

Hi All,
I am facing some problem while loggin into sap server.
logon balancing error 88 : canot connect to message server(RC = 9).
Can any one please provide me some idea like y its happenign so?
Tnx,
Joe

Hi
refer the SAP note 882741.
that helps you to resolve the issue
Regards
Manohar

RFC_ERROR_COMMUNICATION: Connect to message server failed

Hi,
I think this is the most common error that one can face and have seen quite a few threads in the forum. Still, i couldn't resolve my problem.
I am getting the following error when i tried to connect to SAP using SAP JCO connector with load balancing.
(102) RFC_ERROR_COMMUNICATION: Connect to message server failed
Connect_PM MSHOST=sapserver, R3NAME=D11, GROUP=Group1
LOCATION    CPIC (TCP/IP) on local host
ERROR       partner not reached (host sapserver, service sapmsD11)
TIME        Wed Jun 24 16:05:49 2009
I added the service sapmsD11 in the services file of my client as well as in R/3 server.
I got the above error when i tried to connect using load balancing. Without load balancing, i was able to connect to R/3 server successfully. Can any one tell how to figure out the message server host name ?
Can the application server host name and message server host name be same ?
PS: I am able to ping my R/3 server from my client.
Thanks,
Prasad.

Hi,
Check that you have configured properly using the below document. And check the message server of R/3 is configured properly in the SLD.
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/c0c1d495-048e-2b10-babd-924a136f56b5
Function module to get the message server host name and port in R/3.
SLDAG_GET_MESSAGE_SERVER_INFO
See this thread also..
Re: Jco Destination
Regards,
Charan

Sharepoint list dataheet view error "Cannot connect to the server at this time. You can continue working with this list, but some data may not be available"

I have a List which is having around 14000 items in it.while opening that list in datasheet view it is giving error .
Below is a summary of the issue:
After selecting datasheet view beow error occurs:
    "Cannot connect to the server at this time. You can continue working with this list, but some data may not be available."
    "Unable to retrieve all data."
    The item counts displays say 100 out of 14000 items.
Exporting List to excel is giving only 2000 records out of 14000 records.
Other Observations   -
This is happening to only one list on the site .There are other lists in the site whose no. of records is equal to 8000 to 9000.They are working absolutely fine without any error.
Also, If I am saving this list as a template and creating another list with it ,then it is working absolutely fine with 14000 records,so the issue does not seem to be related with no. of records as the template list is working fine.
I have checked the Alternate access mapping setting ,its fine.
It should not be related to lookup,datefield or any other column as the list created from it template is working fine with all these columns.
I checked below links also ,but doesn't seem to work in my case.
http://social.technet.microsoft.com/forums/en-US/sharepointadminprevious/thread/974b9168-f548-409b-a7f9-a79b9fdd4c50/
http://social.technet.microsoft.com/Forums/en-US/smallbusinessserver/thread/87077dd8-a329-48e8-b42d-d0a8bf87b082
http://social.msdn.microsoft.com/Forums/en-US/sharepointgeneral/thread/dc757598-f670-4229-9f8a-07656346b9b0

I have spent two days to resolve this issue. Microsoft has released two KBs with reference to this issue...but are not appearing in search results at the top.
I am sharing my finding.
1. First install the
KB2552989 (Hopefully you might have already installed it. The KB detetcts it and informs the user.)
2. Then update registry by adding new key for data fetch timeout as mentioned inKB2553007
These two steps resolved the issue in our environment. Hope it might help others as well.
Pradip T. ------------- MCTS(SharePoint 2010/Web)|MCPD(Web Development) https://www.mcpvirtualbusinesscard.com/VBCServer/paddytakate/profile

Cannot Connect to B1i Server, The Remote Server Returned an Error 401

Hi,
I have installed the integration package ( Without any errors in the installation) and when I connect to SAP B1 I am getting an error msg "Cannot connect to B1i Server. The Remote server returned an error : (401) Unauthorized" And I am not able to view Dasboards.
Thanks in Advance,
Dasari.

Hi Dasari,
When I had installed, this thread helped me out a lot, you should give it try also -
Re: remote server error: (400) bad request. installing Cockpit
and this
[Guide Deleted 31 OCT 2011 - Contained Out of Date Information]
Edited by: Jason Lax on Oct 31, 2011 10:44 AM

InitCatalog:Cannot connect to the server

Hello,
We have installed BPC 7.0 in 2-server architecture.
First server is VM - Windows 2003 32 bit, it contains
- BPC
- Reporting Services
- Integration Services
Second server is physical. Windows 2003 64 bit, it contains
- SQL Server 2005
- OLAP Server 2005
We have installed also a separate client: admin and office tools.
During opening Excel 2007 (provider Microsoft.ACE.OLEDB.12.0 is installed on first server) we got error:
InitCatalog:Cannot connect to the server 'XXXXX'. The server is either not started or too busy.
After clicking the OK button in the error message, I was further notified that Account dimension member cannot be downloaded and so on.
It looks like similar problem as in this thread: InitCatalog:Cannot connect to the server 'XXXXX'.
But it wasn;t solved.
We got also the same error during processing cubes/dimensions from BPC Administrator.
Can anybody help us solving this problem?
Thanks in advance.

Did you install ADOMD.NET and also the QFE into application server?
ADOMD.Net-KB893091-v8.00.0991-x86.EXE
you can download this from follow link:
http://www.microsoft.com/downloads/details.aspx?familyid=790d631b-bff9-4f4a-b648-e9209e6ac8ad&displaylang=en
You have to reboot the server after the installation of this QFE.
Regards
Sorin Radulescu

JRA connection to message server

Hi,
I want to use the JRA to connect to an ABAP back end. The backend is setup to allow load balancing and high availability using a message server and logon groups.
Is it possible to connect to the message server with the JRA. (for example : passing a logon group as a parameter)
Can we benefit from the load balancing offered by the message server.
Thanks.
Thierry Dagnino
Systems Architect
Hydro-Québec

Hi,
I just read about JRA and found the following facts.
'The SAP Java Resource Adapter (SAP JRA) is a J2EE -compatible connector for SAP systems. It enables the integration of SAP systems with J2EE application servers. The SAP JRA implements the standard J2EE interfaces for the SAP Java Connector (SAP JCo), thus simplifying communication between heterogeneous, distributed J2EE landscapes and SAP.
You can use the SAP JRA to call remote functions of an SAP system by executing RFC calls via TCP/IP.'
So I believe since its just an add-on like thing which connects to the SAP system via SAP JCO you shouldn't worry about connecting to message server.
Since while creating a JCO connection you can define whether it should be a load-balanced or not.
Check this link.
http://help.sap.com/saphelp_erp2004/helpdata/en/3a/3b1b40fcdd8f5ce10000000a155106/frameset.htm
another example would be found here...
http://help.sap.com/saphelp_erp2004/helpdata/en/25/19e7752be1c8459258a072d87e3a34/frameset.htm
hope that clears your doubt.
Regards,
Siddhesh

Load balancing error 88: Cannot connect to message server (rc=9)

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