RE: [OT] Random Form Resubmissions

["Caldarale, Charles R" <Ch...@unisys.com>]

> From: Jerry Malcolm [mailto:techstuff@malcolms.com] 
> Subject: OT: Random Form Resubmissions

> I have written defensive code in my webapp to detect this situation and 
> handle it.  So it's not a critical problem now. But it just frustrates 
> me that I have no clue what is going on.  And I'm curious if the users 
> are seeing something strange as this is occurring.  It appears that the 
> client's browser is holding onto the form and just randomly resending it 
> the server without the user's knowledge.  And it finally stops when they 
> close their browser or reboot their computer.  I know this makes zero sense.

This sounds like a lot of fun.  Can you tell from the logs (or doing some traceroute runs) if there's anything in common about the clients?  Things such as a small set of origins (e.g., PRC, NK, AOL, NSA) or client environment (iOS, Android, IE7) might give a clue.

I wonder if some intermediary box thinks it's being useful by trying to get responses to unacknowledged requests and keeps replaying them, but the real client lost interest and disconnected a long time ago.

 - Chuck


THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org

Re: [OT] Random Form Resubmissions

[Andy Wang <aw...@ptc.com>]

On 06/17/2015 12:43 PM, Caldarale, Charles R wrote:
>> From: Jerry Malcolm [mailto:techstuff@malcolms.com]
>> Subject: OT: Random Form Resubmissions
>
>> I have written defensive code in my webapp to detect this situation and
>> handle it.  So it's not a critical problem now. But it just frustrates
>> me that I have no clue what is going on.  And I'm curious if the users
>> are seeing something strange as this is occurring.  It appears that the
>> client's browser is holding onto the form and just randomly resending it
>> the server without the user's knowledge.  And it finally stops when they
>> close their browser or reboot their computer.  I know this makes zero sense.
>
> This sounds like a lot of fun.

HAH!! I was thinking the exact same thing :)

> Can you tell from the logs (or doing some traceroute runs) if there's anything in common about the clients?  Things such as a small set of origins (e.g., PRC, NK, AOL, NSA) or client environment (iOS, Android, IE7) might give a clue.
>
> I wonder if some intermediary box thinks it's being useful by trying to get responses to unacknowledged requests and keeps replaying them, but the real client lost interest and disconnected a long time ago.
>

The comment:
"And it finally stops when they close their browser or reboot their 
computer."
has me thinking, proxy/internet security software on the system doing 
it?  Or a browser extension.  But why and what eludes me.

>   - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org