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From: "SZEDER Gábor" <szeder.dev@gmail.com>
To: Jeff King <peff@peff.net>
Cc: Derrick Stolee <stolee@gmail.com>,
	Derrick Stolee via GitGitGadget <gitgitgadget@gmail.com>,
	git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
	Derrick Stolee <dstolee@microsoft.com>
Subject: Re: [PATCH 1/1] upload-pack: fix race condition in error messages
Date: Thu, 29 Aug 2019 23:58:18 +0200	[thread overview]
Message-ID: <20190829215818.GG8571@szeder.dev> (raw)
In-Reply-To: <20190829143805.GB1746@sigill.intra.peff.net>

On Thu, Aug 29, 2019 at 10:38:05AM -0400, Jeff King wrote:
> So any fixes there have to happen on the client side. I am still
> confused about why the client is writing in this case, per the argument
> in 014ade7484 (upload-pack: send ERR packet for non-tip objects,
> 2019-04-13). It would be nice to use GIT_TRACE_PACKET to see what it's
> trying to write, but I still haven't been able to reproduce the issue.

It's the "done" line:

  + cat trace-packet
  packet:  upload-pack> 5e26403b4485d7a44fd8b65dc3f71e21c0dd6fad HEAD\0multi_ack thin-pack side-band side-band-64k ofs-delta shallow deepen-since deepen-not deepen-relative no-progress include-tag multi_ack_detailed allow-tip-sha1-in-want allow-reachable-sha1-in-want symref=HEAD:refs/heads/master agent=git/2.23.0.40.g4d780d4382.dirty
  packet:  upload-pack> 5e26403b4485d7a44fd8b65dc3f71e21c0dd6fad refs/heads/master
  packet:  upload-pack> 0000
  packet:        fetch< 5e26403b4485d7a44fd8b65dc3f71e21c0dd6fad HEAD\0multi_ack thin-pack side-band side-band-64k ofs-delta shallow deepen-since deepen-not deepen-relative no-progress include-tag multi_ack_detailed allow-tip-sha1-in-want allow-reachable-sha1-in-want symref=HEAD:refs/heads/master agent=git/2.23.0.40.g4d780d4382.dirty
  packet:        fetch< 5e26403b4485d7a44fd8b65dc3f71e21c0dd6fad refs/heads/master
  packet:        fetch< 0000
  packet:        fetch> want 64ea4c133d59fa98e86a771eda009872d6ab2886 multi_ack_detailed side-band-64k thin-pack no-progress ofs-delta deepen-since deepen-not agent=git/2.23.0.40.g4d780d4382.dirty
  packet:        fetch> 0000
  packet:  upload-pack< want 64ea4c133d59fa98e86a771eda009872d6ab2886 multi_ack_detailed side-band-64k thin-pack no-progress ofs-delta deepen-since deepen-not agent=git/2.23.0.40.g4d780d4382.dirty
  packet:  upload-pack< 0000
  packet:  upload-pack> ERR upload-pack: not our ref 64ea4c133d59fa98e86a771eda009872d6ab2886
  packet:  upload-pack> 0000
  packet:        fetch> done

In the avarage successful run that "fetch> done" pkt-line is
immediately after the "fetch> 0000".

The above is on my Linux box; here is a failure on macOS, essentially
the same:

  https://travis-ci.org/szeder/git/jobs/578555606#L3453



  reply	other threads:[~2019-08-29 21:58 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-28  1:43 [PATCH 0/1] upload-pack: fix race condition in t5516 Derrick Stolee via GitGitGadget
2019-08-28  1:43 ` [PATCH 1/1] upload-pack: fix race condition in error messages Derrick Stolee via GitGitGadget
2019-08-28  9:34   ` SZEDER Gábor
2019-08-28 14:54     ` Jeff King
2019-08-28 15:39       ` Jeff King
2019-08-28 16:15         ` SZEDER Gábor
2019-08-29 12:58           ` Derrick Stolee
2019-08-29 14:13             ` Jeff King
2019-08-29 14:27               ` Derrick Stolee
2019-08-29 14:38                 ` Jeff King
2019-08-29 21:58                   ` SZEDER Gábor [this message]
2019-08-29 22:06                     ` SZEDER Gábor
2019-08-30 12:10                       ` SZEDER Gábor
2019-09-04  5:04                         ` Jeff King
2019-09-10 12:08                           ` SZEDER Gábor

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