FINWAIT

1,780 pts.
Tags:
AS/400
AS/400 connection error
AS/400 TCP/IP
I keep getting an TCP error message in qsysopr. I also looked in the TCP connection status and there are lots of close-wait in there . Any ideas what this could be and if there really is a problem? Message ID . . . . . . : TCP2617 Severity . . . . . . . : 20 Message type . . . . . : Diagnostic Date sent . . . . . . : 04/07/09 Time sent . . . . . . : 09:24:46 Message . . . . : TCP/IP connection to remote system 10.1.1.1 closed, reason code 1. Cause . . . . . : The TCP/IP connection to remote system 10.1.1.1 has been closed. The connection was closed for reason code 1. Full connection details for the closed connection include: - local IP address is 10.1.1.1 - local port is 63745 - remote IP address is 10.1.1.1 - remote port is 5544 Reason codes and their meanings follow: 1 = TCP connection closed due to expiration of 10 minute FINWAIT2 timer.
ASKED: April 7, 2009  1:27 PM
UPDATED: April 8, 2009  1:28 PM

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Hi,

The local and remote IP addresses are the same? That seems odd to me.

Regards,

Martin Gilbert.

=============

Maybe this is IPC – inter process communication? I would expect it to use 127.0.01 (localhost) though rather than the IP of the system.

It sounds like the application sent a FIN to close a TCP connection but did not receive the FIN/ACK and therefore was unable to acknowledge with another ACK and then a FIN/ACK for a final close. See this diagram for TCP connection states. The FIN timeout is a normal TCP operation. Unless you are seeing any issues with the application listening on port 5544 then I would say this is not an issue.

In the IT trenches? So am I – read my IT-Trenches blog.

Turns out its a PTF issue. We are behind a few PTF’s. It all has to do with iSeries navigator. I started a monitor job piece to send us emails when a certain subsystem has a problem. It was not responding correctly b/c of a PTF issue. So I’m downloading PTF’s now and we will see what happens… Stay tuned….!

Ron

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