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RFC connection (SM59) fails with load balancing enabled.

Hello All,

We have an RFC connection setup between two SAP systems. The RFC connection works fine if it points to the destination system. But if we enable load balancing, the connection fails with this error:

ERROR partner not reached (host <hostname>, service sapms<SID>)

LOCATION SAP-Server <source system> on host <host name of source> (wp 1)

DETAIL NiPConnect2

CALL SO_ERROR

COMPONENT NI (network interface)

COUNTER 3027

ERROR TEXT Connection refused

ERROR NUMBER 79

MODULE niuxi.c

LINE 1069

RETURN CODE -10

SUBRC 0

RELEASE 46D

TIME Mon Aug 18 18:33:30 2008

VERSION 34

I've checked the /etc/services file, the following entries exist

sapms<SID> 3606/tcp

sapms<SID>s 3600/tcp

lstst at the source system works fine

lgtst -H <target host name> -S sapms<SID>

niping at the target system has a problem

> niping -c -S 3606

Mon Aug 18 10:23:14 2008

connect to server o.k.

      • ERROR => NiTClientLoop: NiTReadLoop (rc=-6) [nixxtst.cpp 2629]

*****************************************************************************

*

  • ERROR connection to partner broken

*

  • TIME Mon Aug 18 10:23:14 2008

  • RELEASE 640

  • COMPONENT NI (network interface)

  • VERSION 37

  • RC -6

  • MODULE niuxi.c

  • LINE 905

  • DETAIL NiPRead (0.0.0.0/0, hdl 1)

  • SYSTEM CALL recv

  • COUNTER 1

*

****************************************************************************

Please help me figure out the problem.

regards,

Roshni

Former Member
Former Member replied

At the target system:

Run SMLG

Double click on the logon group

Go to Attributes tab

Check "Ext.RFC enabled" button and Save

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