[Mailman-Users] arch python errors, bad marshall data

Micah Anderson micah at riseup.net
Mon Jan 7 09:39:32 CET 2002

The machine must have crashed just as a new message was being added,
so the pipermail.pck file was corrupt. The fix is to move the old
~malman/archives/public/listname directory out of the way completely
and rerun ~mailman/bin/arch on the list, which I've done, and all is

On Sun, 06 Jan 2002, Tom Perrine wrote:

> >>>>> On Sun, 6 Jan 2002 12:12:27 -0800, Micah Anderson <micah at riseup.net> said:
>     Micah> The archives of a particular list went astray, so I tried to run arch
>     Micah> to re-pickle them, it went for some time (we have archives for a
>     Micah> couple years), up until December of this year, then it puked, anyone
>     Micah> know how to fix this??
> I have no idea if this is related, but my experience may be
> interesting...
> I have a mailing list that has been running since 1994.  It has about
> 20,000 messages in the non-Mailman archives.  I have been importing
> and re-importing it into Mailman, as I was playing with some Mailman
> options and also correcting corruption in the original archives as
> part of migration into Mailman.
> The first few times I cat'ed all the archive files together and ran
> "arch" on the resulting huge mbox file.  This took overnight, most
> likely because the machine was heavily into swap, and trying to
> compute long lists of links, etc.
> Later, I started "arch"-ing the individual files separately.  This
> stayed out of swap and typically runs all the files in less than an
> hour!
> I guess what I'm getting at is that the "arch" program uses LOTS of
> memory when building some of the indexes, and that incremental
> "arch"-ing may be more efficient and less likely to exercise
> memory-related bugs in Mailman, Python, or the underlying system.
> It will also avoid the situations where you hit the pre-process memory
> limits, which is what I *suspect* has happened to you.
> -- 
> Tom E. Perrine (tep at SDSC.EDU) | San Diego Supercomputer Center 
> http://www.sdsc.edu/~tep/     | Voice: +1.858.534.5000
> "The French are glad to die for love..."  - Moulin Rouge

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