Re: [jetty-dev] Jetty server taking time to respond to SETTINGS

[Greg Wilkins <gregw@xxxxxxxxxxx>]

Pradeep,

As Guillaume says, the key to debugging this is to find out what your server is doing during that 4 seconds.  A tool like JProfiler would help.

You could also simply take several thread dumps and/or server dumps during that pause.

Another approach is to strip down your application to be just a hello world style server, which I do not believe will have the 4s delay. Then add back components until you do see a delay.

If you really think the problem is jetty, then you need to show us a simple reproduction that indicates it is jetty that is busy for those 4s.

regards

On Tue, 27 Jul 2021 at 18:59, Guillaume Maillard <guillaume.maillard@xxxxxxxxx> wrote:

Hi,

I don't think it's possible to investigate such issue without having access to your server,
but I can recommend to you the tool you need to find what's happening : JProfiler 

(you can use the trial version).

Regards,

Guillaume

Le mar. 27 juil. 2021 à 01:43, Pradeep Agrawal (pradeagr) via jetty-dev <jetty-dev@xxxxxxxxxxx> a écrit :

I am using Jetty 9.4 and brining up a server. On connection creation from client, the SETTINGS, WINDOWS_UPDATE, and PING are sent by client and those are immediately ACK by server but actual response for these are sent by server after nearly 4sec. Refer the screenshot below for all packet exchange.

 

 

Has anyone faced similar issue earlier and any idea on why is jetty server taking around 4sec to respond in this case?

 

Thanks, Pradeep

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Greg Wilkins <gregw@xxxxxxxxxxx> CTO http://webtide.com