Vladimir Ozerov created IGNITE-48:
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Summary: Ensure there is no race between quering data and
swap/unswap.
Key: IGNITE-48
URL: https://issues.apache.org/jira/browse/IGNITE-48
Project: Ignite
Issue Type: Task
Components: cache
Affects Versions: sprint-1
Reporter: Vladimir Ozerov
Assignee: Vladimir Ozerov
Fix For: sprint-2
Consider the following scenario:
1) Put a set of keys into cache so that they go to a SQL table "A".
2) Move some of these keys to swap.
3) Start quering table "A". Query will create snapshot of sorted index and will
iterate it.
4) At the same update swapped keys so that they should go to another SQL table
(e.g. change value type).
The question is: what query engine will do when swapped key is met in index
snapshot? If it will try to unswap it, then an error will be thrown (e.g.
ClassCastException).
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