SSL3_WRITE_PENDING error...

[Nicolas Sebrecht]

On Thu, Jan 27, 2011 at 12:37:15PM -0800, Ethan Schoonover wrote:
> 
> I've been running offlineimap with a limited maxage for some time and
> just decided to remove that limitation and pull down the entire gmail
> account in question (not a large one, 1.1GB).
> 
> Running on OSX, Python 2.6.1 with Interactive.basic to monitor
> progress, things went well for quite a white (10 min?) before I hit a
> wall with a string of errors:
> 
> WARNING: ERROR attempting to copy message 4272 for account
> gmail:socket error: [Errno 1] _ssl.c:1209: error:1409F07F:SSL
> routines:SSL3_WRITE_PENDING:bad write retry
> WARNING: ERROR attempting to sync flags for account gmail:920L
> 
> I get a couple hundred of those for individual messages before
> offlineimap hangs. Restarting results in some success for a minute
> followed by the same wall of errors/hang.
> 
> Arch Linux / Python 2.7.1 works out much better (only the occasional
> "classic" silent offlineimap hang at high CPU, but that's not
> unusual).
> 
> I'm going to troubleshoot here, but curious if anyone else has seen
> this or has an "aha I know what that is" idea. I'm out of my depth on
> SSL related matters.

It looks like a bug in the OpenSSL library:

  http://rt.openssl.org/Ticket/Display.html?id=598&user=guest&pass=guest

I wonder if it is fully reetrant. Did you try in the non-threading mode?

We may try to workaround by catching the error and restart a connection,
though.

-- 
Nicolas Sebrecht