Hi Mark,
Thank you for the quick response.

Please provide us a little more clarity on the 3rd query :

3. We see that RST is sent by tomcat on receiving http2 request, when  does 
this happen ? 
>>> When things go wrong. E.g. when the client sends a request to a connection 
>>> that has been closed.

 Why does tomcat not send GOAWAY on connection close, upon next request from 
client it sends RST ?

Also, Can you please send us the references to the timeout related fixes in 
9.0.35 (since 9.0.22).

Thanks and Regards
Arshiya Shariff



-----Original Message-----
From: Mark Thomas <ma...@apache.org> 
Sent: Monday, May 18, 2020 4:17 PM
To: users@tomcat.apache.org
Subject: Re: RST on TCP level sent by Tomcat

On 18/05/2020 11:01, Arshiya Shariff wrote:
> Hi Team,
> 
> Can you please help us with the below queries :

There have been various timeout related fixes since 9.0.22. Please upgrade to 
9.0.35 and re-test.

> 1. When does a http2 connection close ? We see that the 
> keepAliveTimeout is
> 20 seconds by default, but it is not closing the connection on 
> keepAliveTimeout.

Please re-test with 9.0.35.

> 2. How to keep the connections alive / How to enable ping frames to be 
> sent to the other end to keep the connection alive ?

There is no standard API to send an HTTP/2 ping. If you want to keep the 
connections alive for longer, use a longer keep-alive setting.

> 3. We see that RST is sent by tomcat on receiving http2 request, when 
> does this happen ?

When things go wrong. E.g. when the client sends a request to a connection that 
has been closed.

> 4. What are the recommended ipv4.tcp settings for these kind of scenarios ?

There are no recommended settings.

Mark


> 
> 
> 
> Embedded Tomcat         : 9.0.22
> 
> Java Version                     : 1.8.0.201
> 
> Hardware                          : Red Hat Enterprise Linux Server release
> 7.4
> 
> 
> 
> Thanks and Regards
> 
> Arshiya Shariff
> 

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