Welcome! Log In Create A New Profile

Advanced

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin
August 20, 2020 03:18PM
Hello!

On Thu, Aug 20, 2020 at 09:30:37AM -0400, vergil wrote:

> Maxim Dounin Wrote:
> -------------------------------------------------------
> > Do you see any other errors on the same connection before the
> > SSL_shutdown() error? As suggested previously, somethig relevant
> > might be logged at the "info" level. Note that seeing info-level
> > error messages will probably require error logging to be
> > reconfigured, much like with debug.
> >
> > If there is nothing, I'm afraid the only solution would be to try
> > to catch a debugging log related to these errors. As previously
> > suggested, this can be done without too much load by using the
> > debug_connection with relatively large CIDR blocks and waiting for
> > the error to happen from with a client from one of these blocks.
> >
> > --
> > Maxim Dounin
> > http://mdounin.ru/
> > _______________________________________________
> > nginx mailing list
> > nginx@nginx.org
> > http://mailman.nginx.org/mailman/listinfo/nginx
>
>
> Good day.
>
> I've change log level from notice to info and there's indeed one new message
> related to HTTP/2 problem.
>
> 2020/08/20 15:59:31 [info] 32305#32305: *1982005 client timed out (110:
> Connection timed out) while processing HTTP/2 connection, client: XXX,
> server: XXX:443
> 2020/08/20 15:59:36 [crit] 32305#32305: *1982005 SSL_shutdown() failed (SSL:
> error:1409F07F:SSL routines:ssl3_write retry) while processing HTTP/2
> connection, client: XXX, server: XXX:443
>
> I don't know if this will help.

Thanks, I think I have an idea about what's going on here. Likely
these are read timeouts, which can interfere with writes in
HTTP/2, causing SSL_shutdown() errors. Please try the following
patch:

# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1597950898 -10800
# Thu Aug 20 22:14:58 2020 +0300
# Node ID f95e76e9144773a664271c3e91e4cb6df3bc774a
# Parent 7015f26aef904e2ec17b4b6f6387fd3b8298f79d
HTTP/2: connections with read timeouts marked as timed out.

In HTTP/2, closing a connection because of a read timeout might happen
when there are unfinished writes, resulting in SSL_shutdown() errors.
Fix is to mark such connections with the c->timedout flag to avoid sending
SSL shutdown.

diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c
--- a/src/http/v2/ngx_http_v2.c
+++ b/src/http/v2/ngx_http_v2.c
@@ -346,6 +346,7 @@ ngx_http_v2_read_handler(ngx_event_t *re

if (rev->timedout) {
ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
+ c->timedout = 1;
ngx_http_v2_finalize_connection(h2c, NGX_HTTP_V2_PROTOCOL_ERROR);
return;
}


--
Maxim Dounin
http://mdounin.ru/
_______________________________________________
nginx mailing list
nginx@nginx.org
http://mailman.nginx.org/mailman/listinfo/nginx
Subject Author Posted

SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 13, 2020 09:10AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin August 13, 2020 09:34AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 13, 2020 10:01AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 13, 2020 11:39AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin August 13, 2020 11:44AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin August 13, 2020 11:50AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 13, 2020 12:11PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin August 13, 2020 12:44PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 13, 2020 01:04PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 14, 2020 10:34AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin August 15, 2020 06:56PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 16, 2020 01:20PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 18, 2020 05:35AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin August 19, 2020 12:52PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 20, 2020 09:30AM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin August 20, 2020 03:18PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Sergey Kandaurov August 20, 2020 04:48PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

vergil August 21, 2020 01:09PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Maxim Dounin August 21, 2020 06:32PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

Sergey Kandaurov August 24, 2020 06:04AM

RE: Re: SSL_shutdown() failed (SSL: ... bad write retry)

Anonymous User August 19, 2020 01:00PM

RE: Re: SSL_shutdown() failed (SSL: ... bad write retry)

Anonymous User August 20, 2020 10:42AM

RE: Re: SSL_shutdown() failed (SSL: ... bad write retry)

Anonymous User August 20, 2020 06:44PM

Re: SSL_shutdown() failed (SSL: ... bad write retry)

J.R. August 22, 2020 10:22AM



Sorry, only registered users may post in this forum.

Click here to login

Online Users

Guests: 79
Record Number of Users: 6 on February 13, 2018
Record Number of Guests: 421 on December 02, 2018
Powered by nginx      Powered by FreeBSD      PHP Powered      Powered by MariaDB      ipv6 ready