saprfcsap-basispyrfc

Timeout during allocate while making RFC call

I am trying to create a SAP RFC connection to a new system.

AFAIK the firewall (in this case to port 3321) is open.

I get this message at the client:

RFC_COMMUNICATION_FAILURE (rc=1): key=RFC_COMMUNICATION_FAILURE, message=
LOCATION    SAP-Gateway on host ax-swb-q06.prod.lokal / sapgw21
ERROR       timeout during allocate
TIME        Thu Jul 26 16:45:48 2018
RELEASE     753
COMPONENT   SAP-Gateway
VERSION     2
RC          242
MODULE      /bas/753_REL/src/krn/si/gw/gwr3cpic.c
LINE        2210
DETAIL      no connect of TP sapdp21 from host 10.190.10.32 after 20 sec
COUNTER     3
 [MSG: class=, type=, number=, v1-4:=;;;]

And this message on the SAP server

sap-syslog-screenshot

Any clue what needs to be done, to get RFC working?

Solution

  • it works in my case if ashost is the host name, and not an IP address!

    Do not ask me why, but this fails:

    Connection(user='x', passwd='...', ashost='10.190.10.32', sysnr='21', client='494')

    But this works:

    Connection(user='x', passwd='...', ashost='ax-swb-q06.prod.lokal', sysnr='21', client='494')

    This is strange, since DNS resolution happens before TCP communication.

    It seems that the ashost value gets used inside the connection. Strange. For most normal protocols (http, ftp, pop3, ...) this does not matter. Or you get at least a better error message.