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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-9880) Document MVCC write conflict exceptions
Date Mon, 15 Oct 2018 07:55:00 GMT
Vladimir Ozerov created IGNITE-9880:
---------------------------------------

             Summary: Document MVCC write conflict exceptions
                 Key: IGNITE-9880
                 URL: https://issues.apache.org/jira/browse/IGNITE-9880
             Project: Ignite
          Issue Type: Task
          Components: documentation
            Reporter: Vladimir Ozerov
            Assignee: Artem Budnikov
             Fix For: 2.7


When an entry is read (1) inside a transaction and then updated (2), there is a chance that
concurrent transaction will modify that entry in between (1) and (2). In this case an error
is thrown from the first transaction when action (2) is performed and transaction is marked
as "rollback only". User need to re-try the whole transaction in this case.

When native APi is used, then {{CacheException}} is thrown with special message {{Cannot serialize
transaction due to write conflict (transaction is marked for rollback)}}. This will be changed
in future (AI 2.8|) - special exception type will be thrown.

When JDBC or ODBC are used, then special SQLSTATE code 40001 (aka "Serialization failure")
is propagated to user.



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