[jira] [Created] (IGNITE-16406) SQL select operation could return incomplete data

[Mirza Aliev (Jira)]

Mirza Aliev created IGNITE-16406:
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             Summary: SQL select operation could return incomplete data
                 Key: IGNITE-16406
                 URL: https://issues.apache.org/jira/browse/IGNITE-16406
             Project: Ignite
          Issue Type: Bug
            Reporter: Mirza Aliev
            Assignee: Mirza Aliev


For some reasons select operation couldn't return expected number of rows. We 
noticed that this happens when raft leader is changing. To increase 
reproducibility, we can a bit slow down message handling, for example add this 
code to {{MessageServiceImpl#onMessage(java.lang.String, 
org.apache.ignite.network.NetworkMessage)}}


{code:java}
        if (ThreadLocalRandom.current().nextInt(3) % 2 == 0) {
            try {
                Thread.sleep(300);
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
{code}


Possible direction of research: 
we could check that we do not lose cursor.next command as a raft response 
during the process of leader changing




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