Dropped TCP/IP connection on Windows Client

[Matthew Buchman]

I am seeing a problem with a socket disconnect on the client after an inactivity period on the client of about 20 minutes. I am seeing this in two separate customer environments, with different OS platforms on the server side. One common factor is Gigabit Ethernet; HP NC7781 and Broadcom NeXtreme

The client server application uses basic ICMP. The client opens the recieving endpoint of a socket, performs some transactions, goes to sleep for 20 minutes (waiting on an external event, not on a select) and then wakes up attempting to perform another transaction. WSAGetLastError() returns WSAECONNRESET on the client.

The server does believe the client has closed the socket. This occurs shortly after the client goes to sleep. I haven't debugged the server yet to determine the WinSock value.

Any ideas on the above?

[GIRIJA SWAIN]

I had similar problem with Proliant DL580G@ server with GB NIC NC6770. I had to reinstall NIC driver on the server side.

[rick jones]

Did you really mean to say that the _application_ is using ICMP?

What is the server application? Does it have an inactivity timeout?

[Matthew Buchman]

To answer rick's questions.

The application does not make explicit ICMP calls.

The server application is Legato NetWorker. I am currently working with server engineers to determine the server timeout behavior. Its one of those cases where this use to work, but two customer escallations have appeared, both on GigE and large databases that would expose any changes in timeout behavior.

[Thomas Reich]

Interesting... since i experience the same problems with Legato 7.11 on HP/UX as the server and Win2000 as a client. After about 20 min. the session times out and the backups fail. Could you let me know in case HP came up with some idea what could cause this?

Thomas

[Matthew Buchman]

A response to Thomas Reich:

First and foremost, I ask you to contact Legato Technical Support about your issue.

Secondly, we have the following information from HP, and are working with the customer to determine the impact:

http://wwss1pro.compaq.com/support/reference_library/viewdocument.asp?
source=BU030627_CW01.xml&dt=3
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=PSD_CO040408_CW01&locale=en_US.

Thanks,

Matthew Buchman