Re: How do I investigate apparently random git clone reports of "error: File ... has bad hash"?

From: Thorkil Naur <naur@post11.tele.dk>
Date: Oct 6, 2011, 02:34 UTC
Message-ID: <20111006023425.GA2554@tn24>
In-Reply-To: <m2r53metpo.fsf@igel.home>

Hello Andreas,

Thank you very much for your response. I have separately received the advice of upgrading my curl installation:

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> Date: Fri, 30 Sep 2011 09:08:56 +0200
> From: Karel Gardas <karel.gardas@centrum.cz>
> To: cvs-ghc <cvs-ghc@haskell.org>
> Subject: Re: tn23 (x86 OSX HEAD), build 442, Failure
> ...
> Hello,
>
> my opensolaris builder machine also suffered from the same issue like
> tn23 and sometimes even mbolingbroke and others. Symptoms are you are
> not able to grab the ghc code or subrepos code. The solution is
> simple: (1) either remove curl from your path or (2) update curl to
> the latest version (7.21.7 works for me) and make sure it is really
> using its latest libcurl. Once I did (2) here I've never seen the
> issue again.
> ...

Additional details:

> http://www.haskell.org/pipermail/cvs-ghc/2011-October/066434.html

So it appears that upgrading curl has removed the problem.

Best regards Thorkil

On Sun, Sep 11, 2011 at 09:59:15PM +0200, Andreas Schwab wrote:

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> Thorkil Naur <naur@post11.tele.dk> writes:
> 
> >> $ git clone http://darcs.haskell.org/ghc.git/ build8
> >> Cloning into build8...
> >> error: File 42988feeeb76f5cb92b541e9dac277e073bcb3ef has bad hash
> >> error: Unable to find 42988feeeb76f5cb92b541e9dac277e073bcb3ef under
> > http://darcs.haskell.org/ghc.git
> >> Cannot obtain needed blob 42988feeeb76f5cb92b541e9dac277e073bcb3ef
> >> while processing commit ffb2e81c03a01e74825b3a0223e214df59241fab.
> >> error: Fetch failed.
> 
> I just tried to clone it and got this error:
> 
> $ git clone http://darcs.haskell.org/ghc.git
> Cloning into ghc...
> error: Recv failure: Connection reset by peer (curl_result = 56, http_code = 0, sha1 = be6810bb027643bf0697b3d237426110f064aba1)
> error: Unable to find be6810bb027643bf0697b3d237426110f064aba1 under http://darcs.haskell.org/ghc.git
> Cannot obtain needed commit be6810bb027643bf0697b3d237426110f064aba1
> while processing commit 6942b112082fbcdff5c66f06f56fdd336861da47.
> error: Fetch failed.
> 
> It looks like this is just a network problem.
> 
> Btw, the repo is rather strange.  It's not a bare repo, but does not
> contain a .git directory.  Instead the files that are normally under
> .git are placed directly in the working tree.
> 
> Andreas.
> 
> -- 
> Andreas Schwab, schwab@linux-m68k.org
> GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
> "And now for something completely different."