From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-3.3 required=5.0 tests=MAILING_LIST_MULTI,
	RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H2 autolearn=ham autolearn_force=no
	version=3.4.4
Received: (qmail 732 invoked from network); 6 Oct 2021 04:29:09 -0000
Received: from lists.gnu.org (209.51.188.17)
  by inbox.vuxu.org with ESMTPUTF8; 6 Oct 2021 04:29:09 -0000
Received: from localhost ([::1]:44990 helo=lists1p.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.90_1)
	(envelope-from <info-gnus-english-bounces+ml=inbox.vuxu.org@gnu.org>)
	id 1mXyYE-0002O2-SL
	for ml@inbox.vuxu.org; Wed, 06 Oct 2021 00:29:06 -0400
Received: from eggs.gnu.org ([2001:470:142:3::10]:47588)
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <winkler@gnu.org>) id 1mXyY0-0002No-8q
 for info-gnus-english@gnu.org; Wed, 06 Oct 2021 00:28:52 -0400
Received: from fencepost.gnu.org ([2001:470:142:3::e]:38096)
 by eggs.gnu.org with esmtp (Exim 4.90_1)
 (envelope-from <winkler@gnu.org>)
 id 1mXyXz-0001qw-RQ; Wed, 06 Oct 2021 00:28:51 -0400
Received: from [2600:1700:5650:f790::42] (port=41176 helo=regnitz)
 by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <winkler@gnu.org>)
 id 1mXyXy-00047H-MU; Wed, 06 Oct 2021 00:28:50 -0400
From: "Roland Winkler" <winkler@gnu.org>
To: Eric Abrahamsen <eric@ericabrahamsen.net>
Subject: Re: synchronizing gnus sessions on multiple computers
References: <875yv9nxnn.fsf@gnu.org> <m2wnnp5971.fsf@codeisgreat.org>
 <87pmtgn106.fsf@t14.reltub.ca>
 <CADoYgq89o5LGPk2u-C9cg9tUUwwBX1u5sxzRwOZsHy=WF5c83A@mail.gmail.com>
 <87czpgku8w.fsf@gnu.org> <87k0joqew2.fsf@ericabrahamsen.net>
Date: Tue, 05 Oct 2021 23:28:50 -0500
In-Reply-To: <87k0joqew2.fsf@ericabrahamsen.net> (Eric Abrahamsen's message of
 "Fri, 10 Sep 2021 14:50:21 -0700")
Message-ID: <87ee8ydbel.fsf@gnu.org>
MIME-Version: 1.0
Content-Type: text/plain
X-BeenThere: info-gnus-english@gnu.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: "Announcements and discussions for GNUS,
 the GNU Emacs Usenet newsreader \(in English\)"
 <info-gnus-english.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/info-gnus-english>,
 <mailto:info-gnus-english-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/info-gnus-english>
List-Post: <mailto:info-gnus-english@gnu.org>
List-Help: <mailto:info-gnus-english-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/info-gnus-english>,
 <mailto:info-gnus-english-request@gnu.org?subject=subscribe>
Cc: info-gnus-english@gnu.org
Errors-To: info-gnus-english-bounces+ml=inbox.vuxu.org@gnu.org
Sender: "info-gnus-english"
 <info-gnus-english-bounces+ml=inbox.vuxu.org@gnu.org>

On Fri, Sep 10 2021, Eric Abrahamsen wrote:
> Yes, the .newsrc.eld file only gets written when you save Gnus ("s" in
> the *Group* buffer), and I would absolutely not try to update files for
> a Gnus that's still running, it will not handle that gracefully. It
> should, however, be enough to shut Gnus down first (you can see the
> `gnus-clear-system' function to see what happens then), rsync, then
> restart Gnus.

Thanks, it took me a while to get back to this.  It seems that
`gnus-clear-system' / quitting gnus is missing
`gnus-save-newsrc-file-last-timestamp'.  Quitting gnus, then rsync'ing
gnus followed by a restart of gnus will use .newsrc.eld file from the
other machine.  But when this .newsrc.eld file is saved again, the
timestamp of the file on disk is compared against the old timestamp of
the old file that's already gone.

I submitted a bug report (bug#51052).