taskflow

Session/txn retries on sqlalchemy backend

Bug #1326608 reported by Joshua Harlow
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
taskflow
Triaged
High
Unassigned

Bug Description

When a txn that was started with session.begin() conflicts with another ongoing txn we need to handle this failure (and remerge a new set of data) in the sqlalchemy backend (and repeat this X configurable number of times, then fail if we can not) to further avoid consistency issues.

Revision history for this message
Joshua Harlow (harlowja) wrote :

It should be relatively easy to plug-in a retry loop around/in https://github.com/openstack/taskflow/blob/master/taskflow/persistence/backends/impl_sqlalchemy.py#L299 (catching the appropriate exceptions and attempting the functor again...)

Changed in taskflow:
importance: Undecided → High
Joshua Harlow (harlowja)
Changed in taskflow:
status: New → Triaged
Joshua Harlow (harlowja)
Changed in taskflow:
milestone: none → next-kilo
assignee: nobody → Joshua Harlow (harlowja)
Joshua Harlow (harlowja)
Changed in taskflow:
assignee: Joshua Harlow (harlowja) → nobody
Revision history for this message
Daniel Bengtsson (damani42) wrote :

Hi there,

Do we have any update here, it's still relevant?

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