RFC_COMMUNICATION_FAILURE

[CodingQueries2023]

On server I am getting the error RFC_COMMUNICATION_FAILURE and it is automatically trying to connect to our IP with PORT 3300, which is a wrong port. My correct PORT is 3629 but instead of 3629 it is trying to connect to 3300 and is getting failed to connect to. In my docker file I have mentioned the PORT 3629 and not 3300. Is there anything that you can suggest about the issue?

[bsrdjan]

Hello @CodingQueries2023,

docker port is irrelevant for RFC connection configuration. Please check similar questions

• Port number configuration in Connection PyRFC#79
• Change we change the default port 3300 in the connection parameter #146
• I'm not able to use Load balancer port numbers in the PyRFC config.  PyRFC#202
• Unable to connect SAP system from python using PYRFC, SAPGUI login works fine PyRFC#212
  Regards,
  Srdjan

[CodingQueries2023]

Hi @bsrdjan ,
I talked to our cloud ops team and they checked and told me the server on which the node-rfc code is hosted is able to access the SAP server and there is no connectivity issue in it. My server is ubuntu X86_64 and the SAP SDK I am using is Linux on X86_64 64 bit. But I am getting the following error:

Could you please suggest how to debug or go about this issue

[bsrdjan]

Which connection parameters are you using and did you already test with niping:

• Error - rfc.Client is not a function #10 (comment)
• PyRFC Connection call issues PyRFC#45 (comment)

[CodingQueries2023]

Hi @bsrdjan ,

I am using these parameters:
new nodeRfc.Pool({ connectionParameters: { dest: 'MME', ASHOST: 'IP',GWSERV:'3629',CLIENT:'200', PASSWD: password, USER: userid } });

Could you please let me know if there is any issue with the parameter or if need to change anything here.

[bsrdjan]

GWSERV is used for server connections. in combination with GWHOST, not ASHOST. I cannot help with connection parameters' details because it depends on your ABAP system settings. Connection parameters are documented in sapnwrfc.ini file, in SAP NW RFC SDK folder "demo". There you may find when and how to use which parameter. You can also check with your ABAP system admin. If you have access to SAPGUI client, you can use the same parameters used in SAPGUI client for your ABAP system.

[bsrdjan]

Please re-open if needed