fetch delta resolution vs. checkout (was: java zlib woes)

[Andreas Krey <a.krey@gmx.de>]

On Mon, 27 May 2013 06:11:46 +0000, Andreas Krey wrote:
...
> 
> I now have a full test case (involving a generated repo just shy of 1GB)
> that will reproduce that hang. Will look up the existing jgit bug to
> report there.

On https://bugs.eclipse.org/bugs/show_bug.cgi?id=394078

A question: The delta decoding. If I understand correctly,
git and jgit do verify the packfile content after fetching/cloning,
and need to resolve any deltified files in the pack.

And when checking out a commit it needs this to again for the
files that are being checked out?

Because we now have the phenomenon that the packfile is fetched
ok, but a checkout then hangs (100%) CPU on one of the large files,
and on one that should, according to core.bigfilethreshold, not
even be deltified.

(Setting core.bigfilethreshold to 20m in the source repo (C git)
gets jgit to no longer hang in the fetch/delta resolution phase.
And it doesn't look like jgit would repack the pack file, and
uses it as it was received plus 20 bytes at the end.)

Andreas

-- 
"Totally trivial. Famous last words."
From: Linus Torvalds <torvalds@*.org>
Date: Fri, 22 Jan 2010 07:29:21 -0800