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From "Sergey Kosarev (Jira)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-12549) Scan query/iterator on a replicated cache may get wrong results
Date Thu, 16 Jan 2020 10:10:00 GMT
Sergey Kosarev created IGNITE-12549:
---------------------------------------

             Summary: Scan query/iterator on a replicated cache may get wrong results
                 Key: IGNITE-12549
                 URL: https://issues.apache.org/jira/browse/IGNITE-12549
             Project: Ignite
          Issue Type: Bug
          Components: cache
    Affects Versions: 2.7.6
            Reporter: Sergey Kosarev


Case 1
1.  start server node 1
2  create and fill replicated cache with RebalanceMode.Async (as by default)
3  start servr node 2 
3 immediately execute scan query  on the replicated cache((or just iterate the cache)) on
the node 2
It can get empty or partial results. (if rebalance on node 2 is finished)

Case 2
1.  start server node 1
2  create and fill replicated cache with RebalanceMode.Async (as by default)
3 start client node 2
3  start server node 3 
3 immediately execute scan query  on the replicated cache((or just iterate the cache)) on
the client node 2
It can get empty or partial results. (if rebalance on node 2 is not finished and query is
mapped on the node 2)

It looks like problem in the org.apache.ignite.internal.processors.cache.query.GridCacheQueryAdapter#nodes()

            case REPLICATED:
                if (prj != null || part != null)
                    return nodes(cctx, prj, part);

                if (cctx.affinityNode())
                    return *Collections.singletonList(cctx.localNode())*;

                Collection<ClusterNode> affNodes = nodes(cctx, null, null);

                return affNodes.isEmpty() ? affNodes : *Collections.singletonList(F.rand(affNodes))*;

            case PARTITIONED:
                return nodes(cctx, prj, part);

 





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