[Xen-devel] hg 0.7 released

[Kip Macy]

Hmm - 
What are you doing differently in 0.7 that is causing the server to use more 
memory?

-Kip

On 9/20/05, Matt Mackall <mpm at selenic.com> wrote:
> 
> On Tue, Sep 20, 2005 at 06:07:34PM -0700, Kip Macy wrote:
> > nifty - but 0.7 is not backward compatible with 0.6b:
> > %hg clone http://xenbits.xensource.com/xen-unstable.hg
> > requesting all changes
> > adding changesets
> > adding manifests
> > adding file changes
> > added 6917 changesets with 0 changes to 0 files
> > ** unknown exception encountered, details follow
> > ** report bug details to mercurial at selenic.com
> 
> Not so hasty. The bug is in fact that xenbits is sometimes running out
> of memory. Other times it works just fine. Here are the relevant bits
> from my diagnosis this morning:
> 
> ----
> 
> And then I added exception handling to the pull code, so that it now
> does this:
> 
> abort: premature EOF reading chunk (got 75478 bytes, expected
> 1651992944)!
> 
> That expected number says there's probably something else in the
> stream. Firing up Ethereal and tracing a connection shows:
> 
> <!-- The above is a description of an error in a Python program,
> formatted
> for a Web browser because the 'cgitb' module was enabled. In
> case you
> are not reading this in a Web browser, here is the original
> traceback:
> 
> Traceback (most recent call last):
> File "/var/www/html/xen-unstable.hg", line 9, in ?
> h.run()
> File "/usr/local/hg-0.6c/lib/python/mercurial/hgweb.py", line 701,
> in run
> chunk = f.read(4096)
> File "/usr/local/hg-0.6c/lib/python/mercurial/hg.py", line 1442, in
> read
> self.buf += self.g.next()
> File "/usr/local/hg-0.6c/lib/python/mercurial/hg.py", line 1469, in
> gengroup
> for y in self.manifest.group(linkmap): yield y
> File "/usr/local/hg-0.6c/lib/python/mercurial/revlog.py", line 433,
> in group
> chunks[r] = decompress(data[pos: pos + l])
> File "/usr/local/hg-0.6c/lib/python/mercurial/revlog.py", line 33,
> in decompress
> if t == 'x': return zlib.decompress(bin)
> MemoryError
> 
> -->
> 
> So the server ran out of memory trying to decompress a manifest.
> 
> --
> Mathematics is the supreme nostalgia of our time.
>
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