Question & Answer
Question
The SMTP server is being replaced by CSSMTP on this system. This was done by updating the SMTP proc JCL to use the new program. Now it gets cancelled by TCPIP every five minutes.
The following messages will are being produced:
BPXP018I THREAD tttttttttt, IN PROCESS pppp, ENDED
WITHOUT BEING UNDUBBED WITH COMPLETION CODE 40222000
AND REASON CODE 00000000.
IEF450I SMTP SMTP - ABEND=S222 U0000 REASON=00000000 TIME=hh.mm.ss
Answer
In the TCPIP PROFILE on this system, the PORT statement has port 25 reserved for SMTP, and SMTP is also listed in the AUTOLOG statement. But the CSSMTP process does not open that port as it does not accept mail inbound from the TCP/IP network. Since CSSMTP was started using the same name as the old SMTP server (to make this transparent to the users) and it is being started by the AUTOLOG list, TCPIP will check to verify that it is listening on all of its listed ports every five minutes. When no listener is detected for port 25, TCPIP will recycle the server.
To correct this problem, perform one of the following actions:
Remove the PORT 25 TCP statement.
Change its definition from SMTP to RESERVED (to block any usage).
Remove SMTP from the AUTOLOG list, and use some other automation method to start it.
Any of these can be performed dynamically using an OBEYFILE command.
Product Synonym
ZOSCS COMMSERVER
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Document Information
Modified date:
13 June 2018
UID
dwa1453214