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Posted to issues@ignite.apache.org by "Alexey Scherbakov (Jira)" <ji...@apache.org> on 2024/05/20 12:24:00 UTC

[jira] [Created] (IGNITE-22286) Remove waitTimeout in deadlock retry policy

Alexey Scherbakov created IGNITE-22286:
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             Summary: Remove waitTimeout in deadlock retry policy
                 Key: IGNITE-22286
                 URL: https://issues.apache.org/jira/browse/IGNITE-22286
             Project: Ignite
          Issue Type: Improvement
    Affects Versions: 3.0.0-beta1
            Reporter: Alexey Scherbakov
             Fix For: 3.0


After IGNITE-21540 and IGNITE-20127 we now have proper retries on client side.

This means we no longer need org.apache.ignite.internal.tx.DeadlockPreventionPolicy#waitTimeout as a part of deadock prevention policy.

Client side retries has benefit in the following scenario (having in mind WAIT_DIE prevention):
 # tx1 takes lock at timestamp 10
 # tx2 tries to take lock at timestamp 20 and goes for retry (without holding lock)
 # tx1 lock is released
 # tx3 takes lock at timestamp 30
 # tx3 lock is released
 # tx2 attemps to lock after retry and succeeds

Without retry on step 2 tx3 would retry too on step 4.



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