SYSTEM CALL connect ERRNO 79 ERRNO TEXT A remote host refused an attempted connect operation

[Former Member]

Hello All,

I have a scenario where RFC receiver communication channel to R/3 4.6C is failing and I find the following error in SXMB_MONI

Connect to SAP Gateway failed

System call connect errno 79 errono  text a remote host refused an attempted connect operation.

pls check the attachment.

Telnet to port 3301 from PI is okay.

What could be the issue here?

[former_member182412]

Hi Tariq,

Check question 20 in this note 730870 - FAQ XI 3.0/ PI 7.0/ PI 7.1/ PI 7.11/ PI 7.2/ 7.3 RFC Adapter

Q 20: It is not possible to send RFC calls to the RFC Adapter sender channel and the RFC Adapter is not registered at the SAP Gateway. RFC Adapter receiver channels report a error like "RFC Adapter: receiver channel not in list of running clientPools..." in the Message Audit Log of the Adapter Engine. What happened?


              A: The RFC Adapter checks the configuration of each channel during the start of this channel. This is done during startup of the whole RFC Adapter (J2EE service) or when the RFC Adapter receives a new (or changed) channel from the Integration Directory. Mainly the RFC client parameter are checked with a connect/disconnect to the remote system. In receiver channels this is done for the client parameter and the metadata repository parameter, in sender channels only for the metadata repository parameter. If this check fails the channel is marked as failed and will not be used for sending or receiving of RFC calles within RFC Adapter. The test is done again each time when the channel is updated in the Integration Directory or after a restart of the RFC Adapter. The status of each channel in the RFC Adapter can be monitored in the Adapter Monitor. Note 769791 describes this in detail.


              There may be situations where the check of the connection will fail due to a temporary error (like network, ...). The channel will not be usable despite the temporary error may disappeared when the first message should be delivered through this channel. If this is common in the environment where the RFC Adapter is used, the check can be disabled for the whole RFC Adapter. Set the RFC Adapter J2EE service property 'initialRfcClientConnectCheck' from 'true' to 'false'. The changing of J2EE properties is discussed in Q 17. This parameter was introduced in XI 3.0 SP9.

Change the parameter initialRfcClientConnectCheck as per this note 1770579 - Messages fail in PI RFC Receiver Adapter with RFC_ERROR_COMMUNICATION

Regards,

Praveen.

[bhavesh_kantilal]

Are are the authorizations required for the user to read the metadata in place?

Worth checking this link and making sure the authorizations are in place.

https://help.sap.com/saphelp_nw73/helpdata/en/c8/e80440a832e369e10000000a155106/content.htm?frameset...

Regards,

Bhavesh

[former_member186851]

Hello Tariq,

Issue is because of  connection to ECC system via RFC.

Check the details mentioned in the channel including program ID.

If any changes are done stop/start the channel.