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From: Michael Albinus <michael.albinus@HIDDEN>
To: James Thomas <jimjoe@HIDDEN>
Subject: Re: bug#49954: bug#60534: 28.2; Forbidden reentrant call of Tramp
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James Thomas <jimjoe@HIDDEN> writes:
Hi James,
>> > > To detail (AISI and total guesswork), for the missing output betwee=
n 'attachments':
>> > >
>> > > Right after detaching, attach a second background dtach 'client' ju=
st to collect output, (and detach it) and cat its buffer file's contents p=
rior to the main reattachment.
>> > >
>> > > If the delays above are problematic (race conditions?), do it
>> > > beforehand at process start itself, and clear it ('bash -c "> buffe=
r"'
>> > > ?) right before the main detachment (in that case, perhaps use this
>> > > only for these cases so that the buffer doesn't keep growing large)=
.
>> >=20
>> > The problem in Tramp is not the "missing output". It's rather a race
>> > condition. Imagine, you have two funtions accessing the remote proces=
s
>> > inparallel. There are several shell commands needed to finish the
>> > function. For example
>> >=20
>>=20
>> AISI:
>>=20
>> > functionA: "cd /path/to/dir; do something"
>> > functionB: "cd /somewhere/else; do something else"
>> >=20
>>=20
>> functionA: "<send dtach char>; cd /path/to/dir; dtach <args> do somethi=
ng"
>> (and ditto for B)
>
> Isolating a single nesting (using the 2nd approach), this is, more accur=
ately:
>
> functionA: "cd /path/to/dir; dtach <args> do something | tee <args> buff=
er"
> functionB: "<send dtach char C-\> > buffer; cd /somewhere/else; do somet=
hing else; cd /path/to/dir; cat buffer; dtach <reattach args>"
>
>>=20
>> > If they disturb each other after the cd command, we would get errors.=
I
>> > don't see how dtach could solve this.
> (Resending, with some more context, since my earlier message seems not t=
o have arrived at debbugs)
> Some more considerations regarding any borderline race conditions:
>
> - Any priority for receiving output from dtach's master process, I assum=
e are, ceteris paribus, in the ordinal rank of the child client processes=
.
>
> - To account for any maximal marginal delays above, the output of the 'r=
eal' process could be intentionally delayed at specific message separators=
(such as newlines) by piping it through something by default.
>
> So my question is:
>
> Is all this totally ignorant of something?
I haven't tested your dtach scenario (I guess it works remotely as
described). The problem is still attribution of the process output in
Tramp, whether it belongs to functionA or functionB.
Remember, the Tramp control flow is (modulo error handling):
function(A or B):
- assemble the needed command for the remote shell
- send it to the remote via tramp-send-command
- call accept-process-output until a shell prompt is detected
- collect the output from the output buffer and let function(A or B)
handle it
We have only one process available (Tramp's so called connection
process), which is responsible for sending the command to the remote,
and receiving the output. That means, either functionA or functionB must
defer calling accept-process-output (how does it know?), until the other
function has finished this part. This is hard to implement. And if we
would have such a mechanism, we wouldn't need dtach anymore. If
functionB (for example) detects, that functionA is speaking with the
remote, just defer calling tramp-send-command, until functionA is finished=
.
This sounds rather like a job for threads and mutexes. An attempt to use
threads in Tramp failed some years ago, 'tho.
Best regards, Michael.
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
Full text available.
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Date: Mon, 13 Oct 2025 11:13:59 +0530
From: James Thomas <jimjoe@HIDDEN>
To: Michael Albinus <michael.albinus@HIDDEN>
Subject: Re: bug#49954: bug#60534: 28.2; Forbidden reentrant call of Tramp
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On October 11, 2025 9:07:39 AM GMT+05:30, James Thomas <> wrote:
> On October 10, 2025 1:56:37 PM GMT+05:30, Michael Albinus <> wrote:
> > James Thomas <> writes:
> >=20
> > >> Hi Michael,
> >=20
> > Hi James,
> > =20
> > >> Do you think the dtach program [1] could be used to do this rather =
painlessly?
> > >>=20
> > >> I mean: Run all processes through it; on reentry, detach from the c=
urrent one to launch the new one, and redisplay the prompt at the next wait=
=2E
> > >>=20
> > >> 1: https://dtach=2Esourceforge=2Enet
> > >
> > > To detail (AISI and total guesswork), for the missing output between=
'attachments':
> > >
> > > Right after detaching, attach a second background dtach 'client' jus=
t to collect output, (and detach it) and cat its buffer file's contents pri=
or to the main reattachment=2E
> > >
> > > If the delays above are problematic (race conditions?), do it
> > > beforehand at process start itself, and clear it ('bash -c "> buffer=
"'
> > > ?) right before the main detachment (in that case, perhaps use this
> > > only for these cases so that the buffer doesn't keep growing large)=
=2E
> >=20
> > The problem in Tramp is not the "missing output"=2E It's rather a race
> > condition=2E Imagine, you have two funtions accessing the remote proce=
ss
> > inparallel=2E There are several shell commands needed to finish the
> > function=2E For example
> >=20
>=20
> AISI:
>=20
> > functionA: "cd /path/to/dir; do something"
> > functionB: "cd /somewhere/else; do something else"
> >=20
>=20
> functionA: "<send dtach char>; cd /path/to/dir; dtach <args> do somethin=
g"
> (and ditto for B)
Isolating a single nesting (using the 2nd approach), this is, more accurat=
ely:
functionA: "cd /path/to/dir; dtach <args> do something | tee <args> buffer=
"
functionB: "<send dtach char C-\> > buffer; cd /somewhere/else; do somethi=
ng else; cd /path/to/dir; cat buffer; dtach <reattach args>"
>=20
> > If they disturb each other after the cd command, we would get errors=
=2E I
> > don't see how dtach could solve this=2E
(Resending, with some more context, since my earlier message seems not to =
have arrived at debbugs)
Some more considerations regarding any borderline race conditions:
- Any priority for receiving output from dtach's master process, I assume =
are, ceteris paribus, in the ordinal rank of the child client processes=2E
- To account for any maximal marginal delays above, the output of the 'rea=
l' process could be intentionally delayed at specific message separators (s=
uch as newlines) by piping it through something by default=2E
So my question is:
Is all this totally ignorant of something?
--
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
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From: Michael Albinus <michael.albinus@HIDDEN>
To: James Thomas <jimjoe@HIDDEN>
Subject: Re: bug#49954: bug#60534: 28.2; Forbidden reentrant call of Tramp
In-Reply-To: <39F26289-35B3-4FB8-8DC5-5B4EC228DF73@HIDDEN>
References: <68310D70-1BAA-48F0-BB99-39E02A020BD1@HIDDEN>
<39F26289-35B3-4FB8-8DC5-5B4EC228DF73@HIDDEN>
Date: Fri, 10 Oct 2025 10:26:37 +0200
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James Thomas <jimjoe@HIDDEN> writes:
>> Hi Michael,
Hi James,
=20
>> Do you think the dtach program [1] could be used to do this rather pain=
lessly?
>>=20
>> I mean: Run all processes through it; on reentry, detach from the curre=
nt one to launch the new one, and redisplay the prompt at the next wait.
>>=20
>> 1: https://dtach.sourceforge.net
>
> To detail (AISI and total guesswork), for the missing output between 'at=
tachments':
>
> Right after detaching, attach a second background dtach 'client' just to=
collect output, (and detach it) and cat its buffer file's contents prior =
to the main reattachment.
>
> If the delays above are problematic (race conditions?), do it
> beforehand at process start itself, and clear it ('bash -c "> buffer"'
> ?) right before the main detachment (in that case, perhaps use this
> only for these cases so that the buffer doesn't keep growing large).
The problem in Tramp is not the "missing output". It's rather a race
condition. Imagine, you have two funtions accessing the remote process
inparallel. There are several shell commands needed to finish the
function. For example
functionA: "cd /path/to/dir; do something"
functionB: "cd /somewhere/else; do something else"
If they disturb each other after the cd command, we would get errors. I
don't see how dtach could solve this.
Best regards, Michael.
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
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Date: Thu, 09 Oct 2025 15:03:03 +0530
From: James Thomas <jimjoe@HIDDEN>
To: michael.albinus@HIDDEN
Subject: Re: bug#49954: bug#60534: 28.2; Forbidden reentrant call of Tramp
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On October 8, 2025 3:45:15 AM GMT+05:30, James Thomas <> wrote:
> Hi Michael,
>=20
> Do you think the dtach program [1] could be used to do this rather painl=
essly?
>=20
> I mean: Run all processes through it; on reentry, detach from the curren=
t one to launch the new one, and redisplay the prompt at the next wait=2E
>=20
> 1: https://dtach=2Esourceforge=2Enet
To detail (AISI and total guesswork), for the missing output between 'atta=
chments':
Right after detaching, attach a second background dtach 'client' just to c=
ollect output, (and detach it) and cat its buffer file's contents prior to =
the main reattachment=2E
If the delays above are problematic (race conditions?), do it beforehand a=
t process start itself, and clear it ('bash -c "> buffer"' ?) right before =
the main detachment (in that case, perhaps use this only for these cases so=
that the buffer doesn't keep growing large)=2E
--
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
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Date: Wed, 08 Oct 2025 03:45:15 +0530
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To: michael.albinus@HIDDEN
Subject: bug#49954: bug#60534: 28.2; Forbidden reentrant call of Tramp
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Content preview: Hi Michael, Do you think the dtach program [1] could be used
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[212.227.17.20 listed in bl.score.senderscore.com]
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Hi Michael,
Do you think the dtach program [1] could be used to do this rather painles=
sly?
I mean: Run all processes through it; on reentry, detach from the current =
one to launch the new one, and redisplay the prompt at the next wait=2E
1: https://dtach=2Esourceforge=2Enet
Regards,
James
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
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The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Michael Albinus wrote: > Not so simple. > ... Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 RCVD_IN_VALIDITY_RPBL_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [212.227.17.21 listed in bl.score.senderscore.com] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [212.227.17.21 listed in wl.mailspike.net] 0.0 RCVD_IN_VALIDITY_CERTIFIED_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [212.227.17.21 listed in sa-trusted.bondedsender.org] -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [212.227.17.21 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (jimjoe[at]gmx.net) 2.1 DATE_IN_PAST_96_XX Date: is 96 hours or more before Received: date 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-Debbugs-Envelope-To: 60534 Cc: Dima Kogan <dima@HIDDEN>, 49954 <at> debbugs.gnu.org, 60534 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: 0.4 (/) Michael Albinus wrote: > Not so simple. > ... > And it isn't clear to me how to keep two connections in sync, if (for > example) the environment changes in one of the connections. Be it an > environment variable, the current directory, the availability of a > temp file, you name it. And here was I thinking that Tramp was mostly remote-state-less beyond the handshake... > There is a serious overhead when opening a new connection, due to the > handshaking actions. OK; I misremembered for a moment that it was beyond any ControlPersist. > But yes, nobody has tried it yet. My preference is to use threads, so > that one command in a process filter could wait until another command > in the main thread has finished, as example. But the crucial point is, > that you must activate threads in the beginning of a connection. When > you detect, that there is a forbidded reentrant call, it is too late > to activate threads. Ah, crucial; but not a blocker, I suppose. Thank you for the effort in explaining, Michael. Regards, James
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
Full text available.Received: (at 60534) by debbugs.gnu.org; 17 Dec 2024 22:10:21 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Dec 17 17:10:21 2024 Received: from localhost ([127.0.0.1]:60628 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tNfli-0000Zg-AN for submit <at> debbugs.gnu.org; Tue, 17 Dec 2024 17:10:21 -0500 Received: from mout.gmx.net ([212.227.17.20]:54619) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <jimjoe@HIDDEN>) id 1tNflW-0000Te-Bo; Tue, 17 Dec 2024 17:10:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.net; s=s31663417; t=1734473397; x=1735078197; i=jimjoe@HIDDEN; bh=f32uRoRFEhYsooAK30nfwrLQPwFTfM47sYPpffwkzHs=; h=X-UI-Sender-Class:From:To:Cc:Subject:In-Reply-To:Date:Message-ID: References:MIME-Version:Content-Type:cc:content-transfer-encoding: content-type:date:from:message-id:mime-version:reply-to:subject: to; b=aJUcpqbW1t3Rpn/3shAQ3j13/7kz8UxxmzWmoBxELp3jXzrmEEfCNzr3Dug3hie/ bGWsEvANbPAPww+7whWkkshuP+gwLYpRgu78Gqq+fFnWhJexOMjzHk994//P8fqTa BqCbXKr8DV7AYiENTsLP1/2JlICKiwMe5iosVrKPVn5dFZ183EZ/C9c7HQt9d+og8 rnXUE3vnzEZ8LFweT5EvI7Hv6aKv82K1J9ES+TcgT9vjFOWbzn08xcxu9DJ9cjfqI jBkao0BSiAhe85fHb+bP/JhdM+FwiAoj3wkthgZGRBV8ICTcZs9emADFWTJSIa00W e9AUat3LOm1o0R6xVQ== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from user-Inspiron-3493 ([42.108.26.156]) by mail.gmx.net (mrgmx104 [212.227.17.174]) with ESMTPSA (Nemesis) id 1MZCfJ-1t1HPe402L-00Q12r; Tue, 17 Dec 2024 23:09:56 +0100 From: James Thomas <jimjoe@HIDDEN> To: Michael Albinus <michael.albinus@HIDDEN> Subject: Re: bug#60534: 28.2; Forbidden reentrant call of Tramp In-Reply-To: <87o71an24v.fsf@HIDDEN> (Michael Albinus's message of "Tue, 17 Dec 2024 09:29:36 +0100") Date: Tue, 17 Dec 2024 18:41:53 +0530 Message-ID: <86bjxafo86.fsf@HIDDEN> References: <875ywf9ea7.fsf@HIDDEN> <871r72ssqi.fsf@HIDDEN> <874kby7wn5.fsf@HIDDEN> <875ywdquds.fsf@HIDDEN> <87pmtfjyw4.fsf@HIDDEN> <878s03s3t1.fsf@HIDDEN> <86frmnb6j9.fsf_-_@HIDDEN> <87o71an24v.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Provags-ID: V03:K1:8eD8RV08f4sR7L+BXf7ugejCyWuPxmqx3jDq1NOe7M91SCk7ORY 27ii+WJjQ0aInk8BOMBAfltTSXlW7P5cdaixyPGco6j+3ugT4yUpczCYmzF1gfHfJSr69gH /kNckZodAXPNu5RR+8YaW/621bfAtRT/EWIaybl+mLO588Os9c49H4JZAdRUCy2cjcXUaeu juaVaRfIOecAlV42NtTqQ== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:jGnsgqQERdY=;gQfh9wVURpqDrWxTOcWqI++X+2E 2TllaoAHiPInxXujW7i+Ldtm9JwJjoG4ypbEUamkw7LaIRSgLvnO16Vl9+c0h2/nxagCjCrIo VfG22XhPwxuNjTWYsIbpDIkqpbEX+jaiVf8EtMsebxuQ0k2760eE5darpoVvSSxFza3Tid11N QU+854MqcowH8rj9ecSRmXyvCyH67Z/udr9v5c/OdZ5IVyooVtpazpoSwqialZh++IpGe74B7 6DbY7JORe/zuBUfjku28LkDLRO9ErU9idwwdZbCkNFvPVPDFZLt+u2l4YL5IX4nPOCgxMFkw8 qBLAdSBhs6S4VnBo9YHviKx8yfzRF5ILI6lPTQAPBgzpNSO/87cqF6KqBLAv86Jt5GuiZzOwa OOS920ixHodw7FT/tuLZhuMZi8ZxThi/eOjGtwAP792FVJSzGmwPd14XRt06dILaupmsALQyF FpyfbmlTi7LNurwDMMjMHGOxh6dV8jJ4zopIo4yaEP6awaEIDubpbFdcjig6VF9U0hXSG9GsB /uvQWTU4JrDiWkr9qQHnoQpssUPlr8tjfZGxVrPX1aFka9waPY/b4XR74Nd1dM5LYWa9eeJ5B T+EqoaXYZXryxRXuq/9yE0kL8InTVTGcKPMhkiRBBetewUj0J6aiDSncZwrBXWbqVH1eguecS m8MHXNn/mTS5lxKLzVowFdciucahP50VXb4VILdXQqLeYiGF2oWEIQjN6qt26fB2dYydmnYSw jCzbbtsGg1lLOGLKgRiOcFkMDmJETrKDvj0y2aUbkakbGAiEEqGU5vgAyj9bVU2obR4fpa7o+ DElVLLa6I/znwSIbon/Lv5lQ8HY8ny4UVBMG6we+tzuQzh/2Eqd8Bu/Sry4AxtrwKzfyB0tS5 fJlPow50YeM+v5/ctbrATbBpIXjyvz5A0TcE52R3aG2Dir3MVQxucPn4dcPQqUhAyp4PLvJ0P Hauk8+q/H8amxCwXAMq8AR5Hhrn7PszdvNPNDKtgPS3zg/Ps0xHHoGHopGbKjk0U+0Y3ZyV6a I8lkATl4/ACszj0ewD1swGgzm8duA5VBkLHonsCtiL+C2v2e2v31o/+Zutn8KCRQ8r8UBIAXY SJA026yrzMU2wxQsNPsqK4gUx8zDBV X-Spam-Score: 0.4 (/) X-Debbugs-Envelope-To: 60534 Cc: Dima Kogan <dima@HIDDEN>, 49954 <at> debbugs.gnu.org, 60534 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.6 (/) Michael Albinus wrote: > Not so simple. > ... > And it isn't clear to me how to keep two connections in sync, if (for > example) the environment changes in one of the connections. Be it an > environment variable, the current directory, the availability of a > temp file, you name it. And here was I thinking that Tramp was mostly remote-state-less beyond the handshake... > There is a serious overhead when opening a new connection, due to the > handshaking actions. OK; I misremembered for a moment that it was beyond any ControlPersist. > But yes, nobody has tried it yet. My preference is to use threads, so > that one command in a process filter could wait until another command > in the main thread has finished, as example. But the crucial point is, > that you must activate threads in the beginning of a connection. When > you detect, that there is a forbidded reentrant call, it is too late > to activate threads. Ah, crucial; but not a blocker, I suppose. Thank you for the effort in explaining, Michael. Regards, James
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
Full text available.Received: (at 60534) by debbugs.gnu.org; 17 Dec 2024 08:29:51 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Dec 17 03:29:51 2024 Received: from localhost ([127.0.0.1]:57441 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tNSxi-0001sO-Jv for submit <at> debbugs.gnu.org; Tue, 17 Dec 2024 03:29:50 -0500 Received: from mout.gmx.net ([212.227.17.20]:41881) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <michael.albinus@HIDDEN>) id 1tNSxg-0001s5-Kv; Tue, 17 Dec 2024 03:29:49 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.de; s=s31663417; t=1734424179; x=1735028979; i=michael.albinus@HIDDEN; bh=42LKFyYcjMbt8YkMaT9SqA9uiz8+IYUhtdbtMMWZ7U0=; h=X-UI-Sender-Class:From:To:Cc:Subject:In-Reply-To:References:Date: Message-ID:MIME-Version:Content-Type:cc:content-transfer-encoding: content-type:date:from:message-id:mime-version:reply-to:subject: to; b=U14ylHG5beExgDy9++U/cLpQslO7v7mmQad4zzYcBlgCAxZ48ZLqqohGKzcq2KNO n2O7LojbOOoZcvbI6udj4ozwsNpmdb5Xk0BXZ35iIT9uvClDRPJvyXh/67HC7JZKZ ktFqdIYq6Yyo/BvJb8NEDn7WQc7sEAhVhrjWP1ffY/3gaAeUDMBWLrjyU7Xdve+11 L3VNmDXvsccjLal23sHHckGl9BaHBRdAorcLWSYz9yIYKK85te82Twlx1INQA0M7s qIZGlvMLePOXAa4d/JTrNbI6tcHmc+v91voukC5+MRZD8BYUBzyp6J2zWDEkQfzEV xXU7elqgq0uE4wykCA== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from gandalf.gmx.de ([185.89.38.155]) by mail.gmx.net (mrgmx104 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MryXN-1ttAjW2gCr-00gQ9J; Tue, 17 Dec 2024 09:29:39 +0100 From: Michael Albinus <michael.albinus@HIDDEN> To: James Thomas <jimjoe@HIDDEN> Subject: Re: bug#60534: 28.2; Forbidden reentrant call of Tramp In-Reply-To: <86frmnb6j9.fsf_-_@HIDDEN> (James Thomas's message of "Tue, 17 Dec 2024 04:05:22 +0530") References: <875ywf9ea7.fsf@HIDDEN> <871r72ssqi.fsf@HIDDEN> <874kby7wn5.fsf@HIDDEN> <875ywdquds.fsf@HIDDEN> <87pmtfjyw4.fsf@HIDDEN> <878s03s3t1.fsf@HIDDEN> <86frmnb6j9.fsf_-_@HIDDEN> Date: Tue, 17 Dec 2024 09:29:36 +0100 Message-ID: <87o71an24v.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Provags-ID: V03:K1:wpWQy8Ygw+oHL3nZChcAINKTifIQRW/m8kd4/6Uv6cAEiWyfJJI z3OWMqwHO2fqoC7gv1IP1LPsqYRGBHjUiAu/8wTgYpUWQMTuGRQh+3jf3nB2UXXwU3nsv+L AQiSSm3S40DDrp7BkSbBq1/CJJVYGcvDeQkew1KPGMrYFp2eLsaLW0RTSmd3djL4kW/OJ0V DUKTha5/6mVcIbHNZY3cw== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:eUn4/37X2R0=;mt/ahv4JCXImPz6xgK4erBgwbBc VMAmOihf+Am9nVNY4NyCK5+DCq+wuG+UnrYU+hX4GL2/Z2KNmxZ9oo+kagVgBzWBxFDVJ6VKV t44ZkYGUveSBDYfRvptBxv/JIlBx0OxxEJPANoyvZr2TObZrVLIhcz4mEm01a0pciM81Onhn4 TDD/EzxfMa40i6EMAFkWY35abuF8evOqxdoWH0Xks/ehnmP5RSIPD+SEHr4qsxQdXgwj8Cc5C N2JgGh7Y5OT2yCmSQasD4FXqR40K5Pyk9IpaOC/5d32ahgVH/yJt5219omVX5f0PUs7Rd1Ul/ ETmWh8Lgw0Ad+E0I2XhCLYb4XFOpWtz9jvdXXvwc/SIUQDNNTUfNrfqdbAQFVqhpHRmKBmQ6b fzntdwQFXJevtayEUGigXiSuo9wGK7+Nqr6D19gVd2hzhZAKsw28U8AhfP76N87mfY+xFGLL2 N9HY7QV+zQgOhsuhw2MIWmFp0UYpxlHqH5yDXyBwrHzXz9cDOeoG1dLgDfjR5e/R2Tc+DrS/h Y8CEgvqGXPg6jX17OXL+cYGx8us23JyK5czQ12vQDZ6wNTck8juE9QDC9aNUW166Z+yU/GP+y BFogTf2+bYsmIiUF1cZJjU9D+dR2GcgyzrzgjOSDHQpJ/AuhGGgosijrh8v3ztebNBMPbbADp Do5h4GFZ8u2j23X92C4SW1f1hDqEHSHwnMINKvpxtzo1yGfBvfV1GLWe0pOK6HmfSwttTaKq2 ++C039cJ8uLyWVKxb5i4cCCUZ1GaufM+A1OlMWP5XbIghCpH2FxlqZ0c7sefjoFWKYtHSspH/ nnzrQzjygHSxqjozrADHiWJ1qA3jNjeon/tzoU6n5sATEQAXqHZeVzp/7+5iouXB4Xd3IiGcd 2HWreGphNsWN1p8NGYsN/iolLuNeooFRwGTIa9+YHGMl/zuJREmdVX2UkA0hyA5MU/Yd0DtQD EQZ4WiNviidhksN3ynx6KKEQKYwLNx7bCYA38OXGeTciDt5EWIXkZ/2PaJq0eQc+SfRMQXWd1 U1unaWXB1kjJSF/yCtF6q/QQNm6mNw7MzcMXr/Jc2tHlW3t/JtsPh+Q279HR1FBVSRi2YVFlI dOCSFws1L17+KeHDeb1KiDt3V+n7PG X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 60534 Cc: Dima Kogan <dima@HIDDEN>, 49954 <at> debbugs.gnu.org, 60534 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) James Thomas <jimjoe@HIDDEN> writes: Hi James, >> Not so easy to solve. Ideally, remote file name functions initiated in >> process filters, process sentinels, timers and alike shall wait, until >> the currently executed remote command has finished. Don't know how to >> achieve this. > > (This may be an ignorant question, but) if that's so, is it possible to > open a separate connection (perhaps with a ControlPath suffix, and > ControlPersist-ed) in the place of the "Forbidden reentrant call"? Not so simple. There is a serious overhead when opening a new connection, due to the handshaking actions. And it isn't clear to me how to keep two connections in sync, if (for example) the environment changes in one of the connections. Be it an environment variable, the current directory, the availability of a temp file, you name it. But yes, nobody has tried it yet. My preference is to use threads, so that one command in a process filter could wait until another command in the main thread has finished, as example. But the crucial point is, that you must activate threads in the beginning of a connection. When you detect, that there is a forbidded reentrant call, it is too late to activate threads. > Regards, > James Best regards, Michael.
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
Full text available.Received: (at 60534) by debbugs.gnu.org; 16 Dec 2024 22:35:51 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Dec 16 17:35:51 2024 Received: from localhost ([127.0.0.1]:56627 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tNJgt-0006IL-7m for submit <at> debbugs.gnu.org; Mon, 16 Dec 2024 17:35:51 -0500 Received: from mout.gmx.net ([212.227.17.20]:35761) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <jimjoe@HIDDEN>) id 1tNJgq-0006Hy-C5; Mon, 16 Dec 2024 17:35:49 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.net; s=s31663417; t=1734388539; x=1734993339; i=jimjoe@HIDDEN; bh=RDqboM+e8/ki8R7iyaiNbAHB26N6maNtfySrEUvvQCQ=; h=X-UI-Sender-Class:From:To:Cc:Subject:In-Reply-To:References:Date: Message-ID:MIME-Version:Content-Type:cc:content-transfer-encoding: content-type:date:from:message-id:mime-version:reply-to:subject: to; b=mN7rsc1yTpG2XmXnnFo7052QJ1A0fvWReYwSBZ6fvYVYjAF+s5xHNgFOAg7sCjzc PzTipmEz85ilGY+oZOJBj+06Ct1sbSY3IV3+RnSUkxgj3QIQB6t4WrQQuOLdJmoWP f3i+PCt8I+N1qehrd2+jsN46Q0xx6bJLIvdROAnGFvV5AH+QTKz7HmRH7yv5oT07+ mg99lqFtB78DktO0p2u325kfXOL2Za0+NyHLEPvX5gGGNb11XZlYGRaZt9EdrnRq6 D+Tz/Px4s7Hmdnne27FdEFa6IA2H5yK6Kd+0oIJbAiU+9L4qGz4RwX8G7ACJaAZUA XlYn5jRJAPqOGmnNwg== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from user-Inspiron-3493 ([42.104.189.162]) by mail.gmx.net (mrgmx105 [212.227.17.174]) with ESMTPSA (Nemesis) id 1M89Gt-1tSYTh1fYx-0065vX; Mon, 16 Dec 2024 23:35:39 +0100 From: James Thomas <jimjoe@HIDDEN> To: Michael Albinus <michael.albinus@HIDDEN> Subject: Re: bug#60534: 28.2; Forbidden reentrant call of Tramp In-Reply-To: <878s03s3t1.fsf@HIDDEN> (Michael Albinus's message of "Sat, 11 Sep 2021 14:19:06 +0200") References: <875ywf9ea7.fsf@HIDDEN> <871r72ssqi.fsf@HIDDEN> <874kby7wn5.fsf@HIDDEN> <875ywdquds.fsf@HIDDEN> <87pmtfjyw4.fsf@HIDDEN> <878s03s3t1.fsf@HIDDEN> Date: Tue, 17 Dec 2024 04:05:22 +0530 Message-ID: <86frmnb6j9.fsf_-_@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain X-Provags-ID: V03:K1:+iMeaQkCcHLvLS4KqCi6lc5va29eo30Iz9g8Qsg0BeVyiv8OGQZ 9bV7WdO0sEgeuBYE5FdHUA15phM/EpI1EVwx0XMoDdYtJTFA/DgU0AtoZ96wPH9kf3Wnodz 93Lp/w+rvhXfZDQ9ABEun9vWvaIb/zj6rsEaOchOqu+Krlgo33p8bByEyOk730xoJXx2i5j QOJTCwHX0ixrtLNNB/c/A== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:DE0Q6QtDi54=;IB9Gpb1THKOt899mrUQwKPv6YLX Es0oa4WAYjZNjEMOXUcUtUF3nkyvAGuY1w0zSTNFrCurYHpGXGWJclobEM7mrer6oQOSvK2bj t4ksxRWbsp088smF421LgAaKDMW77szWUfIbFNjx2isWpEH3zxwuj7bSx+5n/FKSKNq/HTCkA GvMMNopyipsKoS/+8GIi4J19ec+/jhtJAHR9OzR9w2vc4UNks8auvwcvXfeOq44oz/6w9KNMj vQddvBelB/iQpW5K8Kp7mZpCTlXx1VM8FcaewAhdqd9I4XXHb9tNR79UYcBslQh6uc+CoB7wJ 2OMSPsqk1nakyxPL4k0qrLmHU4ZGYpvEauTl7ysBpExqkDBBu/1HeCRJ3bEQDky37EArzx7Ha DuyPClzhixKtiQB44lVFJ3aceqPi56y4WoJVXRii1CS0uiQYoTdYFb/tJRXJavVSjrWwEoNKu kSGbwv/NOc6+0zCAmZkhV3o6Y0XKvQoZWb6bjpEBCc064oEXyzHmg8w0yocBLqMWhcQDYBeDC 8ovlJGKKdQd2BicxFLPhZQr4wbMsdaOMhfOIwVZSw9CFqVX5GYG58Vyq4eO59DSNTe0VMtYYP SOKdo65zi/FzL2yRW7q4dXYbvj0XvTi74NsPsjO+DX0VQ+ZGxB5BSAXFvyPavV1enskkOxl0G YBBpoNiF46EU0vW7Br3zAlRBfWBdh1Gukbz2XnWIVeslG00zfrv6Ut8LRJHi6ZVDlqPLVPu+K IFB0ZuZ0FHUbtZWw+l1KwpWbBAqMvFxsAsUU2nH0MfTyZHzUEac64ifoDrVJj4A0BFpKAtY0x 9yxv2mezZ0JqRyctcLqstENG3okbJFYPrhovGD0gnEqU6PFDywAbSvR2ebi2vD6M6wn9BEkTE 0tyCo5kHlmGOAXl0TgY6CZsZoVP9c1da/oDCZTVnrohfnVFrPz+jCKxg1ZKm63IEQ+i9EIIL/ lCaiMs0HoGsh1mc5JZnyZv7lr3YsHjNhg+hVrGVpdcW8SOJV2WLGLOHyxp4iQGLUd0U0uo9bU Cg5dhMZ1zoV7S7hMq8GNAv3Y7WM/r8Xl5M/0EzlstX2D3F7BIYZ/IA3WuNR2Z5eSD69veQ75G kRnWE8N1hxno2V7sgV1I2Cd7WxyrWe X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 60534 Cc: Dima Kogan <dima@HIDDEN>, 49954 <at> debbugs.gnu.org, 60534 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) Michael Albinus wrote: > In order to understand the problem, let's assume the following scenario: > > - You have connected to a remote host, say "/ssh:host:". Tramp uses > internally the process *tramp/ssh host* for communicating with that > process. > > - You have also started another asynchronous process to that remote > host. > > - Now, while normal use of Emacs, the function (file-attributes > "/ssh:host:/path/to/file") is called. Tramp sends a command to the > process *tramp/ssh host*, like "stat /path/to/file". > > - While Tramp waits for the answer of the "stat ..." command, your other > process has finished. It might have a process sentinel, which is > called exactly at this time, because Tramp is in a loop > (accept-process-output ...). > > - This process filter might trigger another file operation, like > (delete-file "/ssh:host:/tmp/tmpfile"). This would require to send > another command to the *tramp/ssh host* process like "rm -f /tmp/tmpfile". > > - Since the first command, "stat ...", hasn't been finished, this would > result in inconsistencies. Tramp detects this situation, and raises > the "Forbidden reentrant call of Tramp" error. > > Not so easy to solve. Ideally, remote file name functions initiated in > process filters, process sentinels, timers and alike shall wait, until > the currently executed remote command has finished. Don't know how to > achieve this. (This may be an ignorant question, but) if that's so, is it possible to open a separate connection (perhaps with a ControlPath suffix, and ControlPersist-ed) in the place of the "Forbidden reentrant call"? Regards, James
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
Full text available.Michael Albinus <michael.albinus@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 60534) by debbugs.gnu.org; 17 Feb 2023 09:42:27 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Feb 17 04:42:27 2023 Received: from localhost ([127.0.0.1]:38509 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1pSxG7-0000Gg-KP for submit <at> debbugs.gnu.org; Fri, 17 Feb 2023 04:42:27 -0500 Received: from mout.gmx.net ([212.227.17.21]:43287) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <michael.albinus@HIDDEN>) id 1pSxG5-0000GS-Ut for 60534 <at> debbugs.gnu.org; Fri, 17 Feb 2023 04:42:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.de; s=s31663417; t=1676626939; i=michael.albinus@HIDDEN; bh=s2RpEkS8ZvKFPGyBFJ5SSD5/GFhL8BBOewoi7jZmCQI=; h=X-UI-Sender-Class:From:To:Cc:Subject:In-Reply-To:References:Date; b=cJ0CsnW8EKepWBIblEIh2/Y0OvIXBBWjnyJ9xsiQiot+qDIoPo5J9UUEq3qqndYPl gFZvNmBfR976LL7nq9ZBfT9j4J97Mri9EhWj6SGK+Ma4tXbov0G9us9rhCTe971a6V 0MfNUthdahHvOoJan1Sg1ecX+KLYXeEBQ77b9Xve5RVIFkcfmQQsUTxh8Jzo6s8jue UWCh3wLlgp8FKnuKD+QY8/UEOAIkLbc+/fU/BE2lQ7algIDaHzQ9B6QnBDNBDvtqAC Pd8P8lwU3ZnCNw8pH21AYlbtPM2HKe6HrAKOvqh9x4tnGHxbSHCqfbtVMq3X48E6Ab h3iG2OzECWk4Q== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from gandalf.gmx.de ([185.89.39.22]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MNbkp-1pCfQ00BTf-00P3cv; Fri, 17 Feb 2023 10:42:19 +0100 From: Michael Albinus <michael.albinus@HIDDEN> To: Georgi Danov <georgi.danov@HIDDEN> Subject: Re: bug#60534: 28.2; Forbidden reentrant call of Tramp In-Reply-To: <AAD7DAAA-B9B6-414F-A3ED-D8004B80E22B@HIDDEN> (Georgi Danov's message of "Tue, 3 Jan 2023 21:52:36 +0100") References: <AAD7DAAA-B9B6-414F-A3ED-D8004B80E22B@HIDDEN> Date: Fri, 17 Feb 2023 10:42:17 +0100 Message-ID: <87zg9c7hmu.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Provags-ID: V03:K1:yAp2AGs4grlBqqsJ2nTkRcRhupPMBycm408B+MzD1fgNP4Rpv3O UKBWd+UTgS3nrT1gCurC+qW9wVDvDHxt6q6WUWiNuWyUzHM39+KLcO04IHII1QkKuiv54dP M5FqRsevitbXHrOkqc7vNzX/+DhhizkG77u+Eyy6SA9w077122eX5oRK31E2K7zA2zg6HHd jugqPEYaO0aqXmZaiR3hA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:FH8DGmv4Sfk=;YuSglu7PPj0FaKgl7XLtKkhfPBd dZ34AS0DH3JGPbXSMCup7lOxK73cPvab+x82DjhZ/60xE77NwSHX9IXy4wRBBdU6PatFtpUbd YJwbuppz5QOJxQ8ddseLnCXylMupcV6MB1yCzBMGY5Jla7rrt3yx0b+6JWXniQzMiyehrfkRc lScBEkE7+x8mh49bHefZX8uiGENXZEPuuRQG33ch8++vD4cVmGZT+W/SKL9K5NJopHLgUmIIQ IX9M5ecKGsEW6Ohvf0jRmHuTH6L9BlatFtLnICUNkzeY6J4/5rNcupebnGiGgUdYf4/3VpSdg NkVQFBhOPUQxd5JqtpSj7C18boOwQfKTEhfKq/6Qpts5QCPkT519csA1VUCdM1Izr5U1lkXus h6jRX+FRDpoZUpo4Qga3ZUHFtzligY4akO0cAX5kyGK49a7Oh++qll83FjXMcqNhWDZla5Wbz qSIP6f6DcozMzEed1jHEDx8pdm3Cq9DUxJSEEqdsREGayAXcg/nD1WYa4D93yUS13BxLpAvDi igG5tymBUE7JuVd8cQaQOfTbCGxVdQ4FDulnt2daWrZavc2T9uCFREwQc78rCcuA59+dEqLs0 D/RlxGhHJMiZsZi+J1IG+JOyf+MIZdBWA6/2qLrBwVKwQ7HA1xQK1mbqBz5UJz57C55fB5RnK eRR5GxtnL9kiZBwW0NmWx/scn4hgIsMvibMYNrNJxzlHhIIFFSiJNBkl/r2CygNIN/HUsqFm3 dCpleu+F+TL86N9hW0QP1sOMhZrELxeSAu5HLU/mKlpGvrYO7O0L/jZde7WcytF2DOtUrKJhD xkmpKHuhDCofTBfDOTKo1uhg4CXhXhqIYIO3urnDTzQNd+Gu0axBhajqSDwWT17zzp6fQsaGD qZ9hTU9SqGe/hOu2hxRNYa2QNjR6ggxP7GtMgrt3lhfzlv5AxOxOLm2opZRoRKvytVZlyMydl SbuiWQ== X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 60534 Cc: 60534 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) Georgi Danov <georgi.danov@HIDDEN> writes: Hi Georgi, > As discussed in github issue > https://github.com/joaotavora/eglot/issues/859# eglot over tramp throws > "reentrant call" error. This is sympthom of underlying design issue - > aux libraries use files without being aware of the tramp conection, the > connection itself has no concurrency control, pooling or other > multi-user features and without that guard error different tramp clients > corrupt each other's communication with the language server. Yes. This is a long standing problem in Tramp I have no solution yet. Likely we need threading in Tramp for this, but this causes other problems. For the time being I merge this with bug#49954, which points to the same problem (although with different symptoms). Best regards, Michael.
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
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[77.117.176.238]) by smtp.gmail.com with ESMTPSA id s8-20020a170906354800b007ad2da5668csm14940312eja.112.2023.01.04.01.33.59 for <60534 <at> debbugs.gnu.org> (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 04 Jan 2023 01:33:59 -0800 (PST) From: Georgi Danov <georgi.danov@HIDDEN> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.300.101.1.3\)) Subject: Re: bug#60534: Acknowledgement (28.2; Forbidden reentrant call of Tramp) Date: Wed, 4 Jan 2023 10:33:47 +0100 References: <AAD7DAAA-B9B6-414F-A3ED-D8004B80E22B@HIDDEN> <handler.60534.B.167279020325447.ack <at> debbugs.gnu.org> To: 60534 <at> debbugs.gnu.org In-Reply-To: <handler.60534.B.167279020325447.ack <at> debbugs.gnu.org> Message-Id: <1998C4D1-AA30-4DF5-AB4B-95F82A10C4A3@HIDDEN> X-Mailer: Apple Mail (2.3731.300.101.1.3) X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 60534 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) additional context: with the docker tramp the problem is reproduced much = easier than with ssh tramp. > On 04.01.2023, at 00:57, GNU bug Tracking System = <help-debbugs@HIDDEN> wrote: >=20 > Thank you for filing a new bug report with debbugs.gnu.org. >=20 > This is an automatically generated reply to let you know your message > has been received. >=20 > Your message is being forwarded to the package maintainers and other > interested parties for their attention; they will reply in due course. >=20 > Your message has been sent to the package maintainer(s): > bug-gnu-emacs@HIDDEN >=20 > If you wish to submit further information on this problem, please > send it to 60534 <at> debbugs.gnu.org. >=20 > Please do not send mail to help-debbugs@HIDDEN unless you wish > to report a problem with the Bug-tracking system. >=20 > --=20 > 60534: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D60534 > GNU Bug Tracking System > Contact help-debbugs@HIDDEN with problems
bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
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[77.117.202.17]) by smtp.gmail.com with ESMTPSA id x7-20020a05600c188700b003d9aa76dc6asm15975730wmp.0.2023.01.03.12.52.49 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 03 Jan 2023 12:52:50 -0800 (PST) From: Georgi Danov <georgi.danov@HIDDEN> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.300.101.1.3\)) Subject: 28.2; Forbidden reentrant call of Tramp Message-Id: <AAD7DAAA-B9B6-414F-A3ED-D8004B80E22B@HIDDEN> Date: Tue, 3 Jan 2023 21:52:36 +0100 To: bug-gnu-emacs@HIDDEN X-Mailer: Apple Mail (2.3731.300.101.1.3) Received-SPF: pass client-ip=2a00:1450:4864:20::32c; envelope-from=georgi.danov@HIDDEN; helo=mail-wm1-x32c.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.3 (-) X-Debbugs-Envelope-To: submit X-Mailman-Approved-At: Tue, 03 Jan 2023 18:56:39 -0500 Cc: michael.albinus@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -2.3 (--) As discussed in github issue https://github.com/joaotavora/eglot/issues/859# eglot over tramp throws "reentrant call" error. This is sympthom of underlying design issue - aux libraries use files without being aware of the tramp conection, the connection itself has no concurrency control, pooling or other multi-user features and without that guard error different tramp = clients corrupt each other's communication with the language server. The problem is reproducible by using company mode, probably the language is not important. In my case it's typescript. Takes 15-30 seconds of editing and autocomplete to trigger it. The main congestions seems to happen in file-truename() -- after displaying candidate company mode goes on to do refresh in the = background and calls file-truename repeatedly while eglot (or someone else) is = occupying the tramp connection. Point is -- the same tramp connection is used by eglot and any other minor mode that queries file name or state, but they have no means to share or coordinate this use other than the exception above. Tramp used to throw more insignificant error in the past and tolerate the behavior (which corrupts the data exchanged between eglot and the lsp) and now throws this error. See `with-tramp-locked-connection` macro.=20 I got this problem with other minor modes too, but did not capture the stack as I lowered the error prio via (add-to-list 'debug-ignored-errors 'remote-file-error). Reading the code would've suggested corruption won't happen but still garbage was let in the stdio pipe and eglot lost = track of the buffer state. -------------------------- In GNU Emacs 28.2 (build 1, x86_64-apple-darwin22.1.0, Carbon Version = 169 AppKit 2299) of 2022-11-24 built on GDMBP.local Windowing system distributor 'Apple Inc.', version 13.1.0 System Description: macOS 13.1 Configured using: 'configure --enable-locallisppath=3D/usr/local/share/emacs/site-lisp = --infodir=3D/usr/local/Cellar/emacs-mac/emacs-28.2-mac-9.1/share/info/emac= s --prefix=3D/usr/local/Cellar/emacs-mac/emacs-28.2-mac-9.1 --with-mac --enable-mac-app=3D/usr/local/Cellar/emacs-mac/emacs-28.2-mac-9.1 --with-gnutls --with-modules' Configured features: ACL GMP GNUTLS JSON LIBXML2 MODULES NOTIFY KQUEUE PDUMPER THREADS TOOLKIT_SCROLL_BARS XIM ZLIB Important settings: value of $LANG: en_US.UTF-8 locale-coding-system: utf-8-unix Major mode: TSX Minor modes in effect: rainbow-delimiters-mode: t electric-pair-mode: t guru-mode: t subword-mode: t eglot--managed-mode: t flymake-mode: t popper-echo-mode: t popper-mode: t global-git-commit-mode: t magit-auto-revert-mode: t joro-mode: t doom-modeline-mode: t minions-mode: t override-global-mode: t global-flycheck-mode: t flycheck-mode: t global-hl-todo-mode: t hl-todo-mode: t which-function-mode: t global-company-mode: t company-mode: t helm-mode: t helm-minibuffer-history-mode: t helm-descbinds-mode: t helm--remap-mouse-mode: t async-bytecomp-package-mode: t ivy-mode: t editorconfig-mode: t winner-mode: t global-undo-tree-mode: t undo-tree-mode: t global-anzu-mode: t anzu-mode: t projectile-mode: t volatile-highlights-mode: t global-hl-line-mode: t super-save-mode: t windmove-mode: t recentf-mode: t savehist-mode: t save-place-mode: t show-smartparens-global-mode: t show-smartparens-mode: t smartparens-mode: t global-auto-revert-mode: t delete-selection-mode: t prelude-mode: t shell-dirtrack-mode: t which-key-mode: t tooltip-mode: t global-eldoc-mode: t eldoc-mode: t show-paren-mode: t electric-indent-mode: t mac-mouse-wheel-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t size-indication-mode: t column-number-mode: t line-number-mode: t indent-tabs-mode: t transient-mark-mode: t Load-path shadows: /Users/gdanov/.emacs.d/elpa/cmake-mode-20221130.1357/cmake-mode hides = /usr/local/share/emacs/site-lisp/cmake/cmake-mode /Users/gdanov/.emacs.d/elpa/transient-20221119.1503/transient hides = /usr/local/Cellar/emacs-mac/emacs-28.2-mac-9.1/share/emacs/28.2/lisp/trans= ient Features: (shadow sort mail-extr emacsbug sendmail typescript-mode cc-mode-expansions smartparens-c cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs eieio-opt speedbar ezimage dframe helm-command bug-reference helm-x-files elisp-slime-nav rainbow-delimiters elec-pair guru-mode 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helm-cider-cheatsheet helm-cider-util cider-cheatsheet cider cider-debug cider-browse-ns cider-mode cider-find cider-inspector cider-completion cider-profile cider-eval cider-jar arc-mode archive-mode cider-repl-history pulse cider-repl cider-resolve cider-test cider-overlays cider-stacktrace cider-doc cider-browse-spec cider-clojuredocs cider-eldoc cider-client cider-common cider-connection cider-util cider-popup sesman-browser nrepl-client nrepl-dict spinner clojure-mode-expansions smartparens-clojure sesman clojure-mode align parseedn parseclj-parser parseclj-lex parseclj-alist posframe doom-modeline doom-modeline-segments doom-modeline-env doom-modeline-core all-the-icons all-the-icons-faces data-material data-weathericons data-octicons data-fileicons data-faicons data-alltheicons shrink-path f f-shortdoc shortdoc s minions doom-themes-ext-org doom-themes-ext-treemacs doom-themes-ext-neotree doom-themes-ext-visual-bell face-remap doom-one-theme doom-themes doom-themes-base nlinum 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mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr grep compile ibuf-ext ibuffer ibuffer-loaddefs bookmark text-property-search pp expand-region text-mode-expansions er-basic-expansions expand-region-core expand-region-custom flyspell ispell rect etags fileloop generator xref project volatile-highlights hl-line super-save windmove recentf tree-widget wid-edit savehist saveplace diminish smartparens-config smartparens-text smartparens advice dash autorevert filenotify delsel prelude-mode easy-mmode crux docker-tramp tramp-cache tramp tramp-loaddefs trampver tramp-integration files-x tramp-compat shell pcomplete comint ansi-color ring parse-time iso8601 time-date ls-lisp format-spec thingatpt imenu-anywhere imenu pcase jka-compr prelude-core epl prelude-ui which-key prelude-custom prelude-packages cl-extra help-mode finder-inf rx info edmacro kmacro package browse-url url url-proxy url-privacy url-expand url-methods url-history url-cookie url-domsuf url-util mailcap 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format env code-pages mule custom widget hashtable-print-readable backquote threads kqueue mac multi-tty make-network-process emacs) Memory information: ((conses 16 1024998 582937) (symbols 48 64969 19) (strings 32 287822 163197) (string-bytes 1 9937920) (vectors 16 113430) (vector-slots 8 2200185 552812) (floats 8 1234 2058) (intervals 56 14261 3055) (buffers 992 43))
Georgi Danov <georgi.danov@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#60534; Package emacs.
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