[Bug 838581] Re: Failures in db_pool code: 'NoneType' object has no attribute '_keymap' or not returning rows.

[Nikolay Sokolov]

> on the nova-network nodes just put --sql_max_pool=1 --sql_min_pool=1
to see if these errors go away.

Tried that, but got same exceptions. Noticed that simultaneous
connections exist anyway, opened lp872780.

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Title:
  Failures in db_pool code: 'NoneType' object has no attribute '_keymap'
  or not returning rows.

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