RFC_ERROR_COMMUNICATION | Unknown host

[bjorn-henrik_zink]

Hi there,

I'm facing problems creating JCo destinations. Here's the test-error-message:

com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to message server host failed Connect_PM TYPE=B MSHOST=elvez2 GROUP=PUBLIC R3NAME=EL2 MSSERV=sapmsEL2 PCS=1 ERROR hostname '?' unknown TIME Tue Mar 08 10:45:14 2005 RELEASE 640 COMPONENT NI (network interface) VERSION 37 RC -2 COUNTER 1

Any help is greatly appreciated.

Thank you.

[Former Member]

Hi Elvez,

are you sure that the message server host and port number which you are mentioning for this JCo destination maintenance are correct? It seems a problem only due to wrong information. Please check the SLD settings in your http://<host>:<port>/sld, test the SLD whether its connecting properly to the R/3 system you are intending to connect. If everything is ok and still this error coming then we have to discuss further.

Regards,

Shubhadip

[bjorn-henrik_zink]

Hi Shubhadip,

thanks for your reply. Here is how I configured my JCo destinations, perhaps you can find my mistake:

SLD /ADMINISTRATION/DATA SUPPLIER BRIGDE:

Gateway Server: ip-address of R/3 system

Gateway Service: sapgw00

SLD /ADMINISTRATION/SERVER PARAMETERS:

Object server: localhost (J2EE engine)

Working Directory: E:\mypath

SLD /ADMINISTRATION/DETAILS (After starting the server):

[UP] NUC:ipaddress_sapgw00_SLD_NUC_1378994491

[UP] UC :ipaddress_sapgw00_SLD_UC_568863868

[UP] NUC:ipaddress_sapgw00_SLD_NUC_1922870502

[UP] UC :ipaddress_sapgw00_SLD_UC_1112846048

[UP] BuilderDirector version 1.0

Updated SLDs:

(local) sld/active

Supported data types:

BCSystem

J2EESystem

ComputerSystem

Current data queue size: 0

Current trace level filter: 2

SLD/ TECHNICAL SYSTEM BROWSER/Web AS ABAP:

data from SAP System (using RZ70)

SLD/ TECHNICAL SYSTEM BROWSER/Web AS Java:

...

SAP SYSTEM/RZ70:

host: ip-address of R/3 system

service: sapgw00

SAP SYSTEM/SMLG:

PUBLIC elvez2_EL2_00

VISUAL ADMINISTRATOR (Web AS Java):

Web AS Java/SLD Data Supplier/HTTP settings/Host: localhost

Web AS Java/SLD Data Supplier/HTTP settings/Port: 50000

Web AS Java/SLD Data Supplier/RFC settings/Gateway Host: localhost

Web AS Java/SLD Data Supplier/RFC settings/Gateway Service: sapgw00

Web AS Java/SLD Data Supplier/CIM/Host: localhost

Web AS Java/SLD Data Supplier/CIM/Port: 50000

Everything works fine in the Visual Administrator. Furthermore, SLD tests in the Web Dynpro Content Administrator are successfull.

What do you think?

[Former Member]

Hello ELvez,

Do you have a solution ? I have the same problem and trying to solve it myself. Let me know.

By the way do you have to maintain RFC settings apart from HTTP settings in visual administrator in SLD Data supplier tab ?