Anton Vinogradov created IGNITE-15329:
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Summary: Atomics should be repairable by Read Repair
Key: IGNITE-15329
URL: https://issues.apache.org/jira/browse/IGNITE-15329
Project: Ignite
Issue Type: Improvement
Reporter: Anton Vinogradov
Assignee: Anton Vinogradov
It's pretty clear that it's impossible to fix atomics with "Read Repair"
atomically since it's impossible to lock entries during the repair process.
Even get from backups has no guarantee to return consistent values under load.
But to fix we must also perform an additional step - cache put.
So, value can be changed between gets, can be changed after gets but before
put, but it still seems to be possible to automize the fix.
Idea is to decide what entry won on the last check attempt and put this value
using the entry processor.
During the entry processor execution, we should check the current node's value,
and if the value is not expected for this node, we should perform put, but
record a concurrent modification event.
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