Comment 1 for bug 838581

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Brian Lamar (blamar) wrote : Re: 'NoneType' object has no attribute '_keymap' on xenserver instance build

My suspicion here is that fixed_ip_associate_pool is failing when being called in quick succession aka at the 'same time'. I believe this is what "with_lockmode" is supposed to prevent...but the SQLAlchemy documentation is very poor in this area.

We're using InnoDB tables are being used.