Strange TCP errors on a customer box -- MIDRANGE-L

Subject: Strange TCP errors on a customer box
From: "James H. H. Lampert" <jamesl@xxxxxxxxxxxxxxxxx>
Date: Thu, 19 Dec 2019 08:50:23 -0800
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Ladies and Gentlemen:

We have a customer. TCP is clearly up, as I'm able to Telnet into it, and I am able to connect to our CRM product on their system, using its traditional Java client.

But if I do a WRKTCPSTS on it, I get:

wrktcpsts Product 5770SS1, option 0003 not installed. Function check. TCP458B unmonitored by QTONSTAT at statement *N,
instruction X'0029'. Problem log updated. Internal system error in program QTONSTAT.

Further, we have a Tomcat-based webapp that provides a web interface to the aforementioned CRM product, and if *it* tries to connect, via the Loopback address, to the same server (and the same port) that I'm able to connect to, it fails, with

java.net.ConnectException: A remote host refused an attempted connect operation. (Connection refused)

Can anybody shed any light on this? Are the two observed phenomena linked in any way?

--
JHHL

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Follow-Ups:

RE: Strange TCP errors on a customer box , Steinmetz, Paul

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