EMC Smarts 7.2 WebConsole frequent dissconnection

Are you connecting through any firewalls?

There is a known issue where CISCO ASA concentrator/firewalls with packet inspection enabled will drop MSS packets and clear the URG bit on packets. This will in turn cause exactly the behavior you are experiencing.

This can be verified with a packet dump from each side of the connection.

Hope this helps.

Hi TCorcoran,

Very helpful indeed and that is something I thought of. and Before inspecting this issue Maybe it is worth mentioning as well that by installing the client and connecting via the follwoing shortcut "C:\InCharge7\SAM\smarts\bin\sm_gui.exe -D com.smarts.disable_keepalives=1"
I dont get disconnected.

Is that relevant?

Thanks

I just tested that startup command from a system that I know to be impacted by the issue I mentioned. It appears to be working without the disconnects.

I could not say conclusively that this means you have the same issue, but that is my guess at this time.

- TC

Thanks a lot TCorcoran.

Regards,

Thanks Berkay,

I would like to say that iFountain is a very interesting piece of work. I have read and seen some demos and soon i will give it a try.

Thanks again for your comment.

Regards,

This seems to happen even without the firewalls. It looks like it is related to the TCP stack implementation.
As far as I can understand (read guess work), when the keepalive's are active, the client sends periodic keep alives using a TCP feature that is not uniformly stable at each OS. The server is using the keepalives to determine the client is still active and if it does not get them, it cuts off the connection. So if for whatever reason client cannot send keepalives, the connection keeps getting reset. When you disable keepalives, the server no longer expects them so does not reset the connection.

It looks like EMC support is also suggesting this solution in some cases, you may want to check with them.

Hope this helps,
Berkay Mollamustafaoglu
http://www.ifountain.com
Voip: + 1 703 349 0538
mberkay on yahoo, google and skype

After doing extensive packet analysis with this problem, it seems simply to be weather or not the URG bit has remained set in transit.

I am sure there are many ways this can happen, as Berkau says the protocol stack implementation can definately be a culprit.

Either way, if you are okay with deploying a custom shortcut to all console users then that is the easiest way to go.

- TC

Thank you TCorcoran, for actually spending time analyzing this issue.

My problem is I cant install the client software for all the agents so they need to use the webconsole

Sincerely,

Hi AaronWang,

Another helpful response. Thank you very much, You guys have been great help

I really appreciate it.

I will certainly post any results that i come up with in here

Regards,

Hello All.

I've got this problem with WEb console, but solve this with add next parameter to file "webconsole.properties "
com.smarts.disable_keepalives=1

and restart tomcat .

Hi Hemul,

Yes, that is correct and that was the first thing I have done to avoid the disconnection.

It seems to me that you have a perfect environment where you connect to the SMARTS server without a firewall intercepting your packets and/or you have an up to date windows client if windows at all, right?

Sincerely,

We are talking about Web console or Smarts global console ?