On Wed, Jul 18, 2007 at 06:13:10PM -0400, I wrote:
> This afternoon, both slaves stopped at the same place, with the same error:

> 070718 17:28:00 [ERROR] Error reading packet from server: error reading log 
> entry ( server_errno=1236)
> 070718 17:28:00 [ERROR] Got fatal error 1236: 'error reading log entry' from 
> master when reading data from binary log
> 070718 17:28:00 [Note] Slave I/O thread exiting, read up to log 
> 'hlgbinlog-oil.000015', position 139702230

It turns out that this is due to a large query and max_allowed_packet
being too small for that query, on the *master*.  If max_allowed_packet
on the slave is too small, you'll get an error message that directly
tells you max_allowed_packet is too small; but if it's too small on
the master, you'll get this cryptic message in the slave's error log,
and nothing at all on the master's error log.
  -- Cos

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