[jira] [Created] (IGNITE-8371) MVCC TX: Force key request during rebalance may cause error on backups.

["Roman Kondakov (JIRA)" <ji...@apache.org>]

Roman Kondakov created IGNITE-8371:
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             Summary: MVCC TX: Force key request during rebalance may cause error on backups.
                 Key: IGNITE-8371
                 URL: https://issues.apache.org/jira/browse/IGNITE-8371
             Project: Ignite
          Issue Type: Bug
          Components: sql
            Reporter: Roman Kondakov


When backup is updating during rebalance and the key to be updated in TX is not supplied yet from the previous partition owner, backup makes force key request in order to obtain this key and all its versions. But later this key can be send to this backup from the previous owner once again as a part of standard rebalance process. And this causes write conflict: we have to write this key on the backup once again.

Solution: do not update key when it has already been written before (during rebalance or force key request process).



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