[ZODB-Dev] weird "MySQL gone away error" when viewing history tab on Script(Python) with RelStorage 1.4.2

[Chris Withers]

Hi Shane,

Attempting to view the /manage_change_history_page of a history-keeping 
relstorage is giving me:

script statement failed: '\n        SELECT 1 FROM current_object WHERE 
zoid = %(oid)s\n        '; parameters: {'oid': 1163686}

...and then:

Traceback (innermost last):
   Module ZPublisher.Publish, line 127, in publish
   Module ZPublisher.mapply, line 77, in mapply
   Module ZPublisher.Publish, line 47, in call_object
   Module Shared.DC.Scripts.Bindings, line 324, in __call__
   Module Shared.DC.Scripts.Bindings, line 361, in _bindAndExec
   Module App.special_dtml, line 185, in _exec
   Module OFS.History, line 120, in manage_change_history
   Module relstorage.storage, line 1011, in history
   Module relstorage.adapters.dbiter, line 120, in iter_object_history
   Module relstorage.adapters.scriptrunner, line 53, in run_script_stmt
   Module MySQLdb.cursors, line 174, in execute
   Module MySQLdb.connections, line 36, in defaulterrorhandler
OperationalError: (2006, 'MySQL server has gone away')

This is happening across at least two separate instances with separate 
storages.

Any ideas?

cheers,

Chris

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