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From "Yakov Zhdanov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-5385) Get rid of discovery custom message on exchange completion
Date Thu, 01 Jun 2017 13:35:04 GMT
Yakov Zhdanov created IGNITE-5385:
-------------------------------------

             Summary: Get rid of discovery custom message on exchange completion
                 Key: IGNITE-5385
                 URL: https://issues.apache.org/jira/browse/IGNITE-5385
             Project: Ignite
          Issue Type: Improvement
          Components: cache
    Affects Versions: 2.0
            Reporter: Yakov Zhdanov
            Assignee: Yakov Zhdanov
            Priority: Blocker
             Fix For: 2.1


Currently if late affinity assignment is on we send full partition map as a custom message
to make sure all nodes get it. With greater number of nodes and caches this can cause significant
slowdowns.

We suggest to move sending to communication. In this case scenario with coordinator failure
requires special handling, since in this case some nodes may receive full map, complete exchange
and proceed with cache operations, while others may not received full map yet. In this case
full map should be resend from new coordinator - it should be recalculated if none has received
one from former coordinator or should be requested from one of the lucky receivers to get
forwarded to other nodes.



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