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Posted to issues@ignite.apache.org by "Ilya Kasnacheev (Jira)" <ji...@apache.org> on 2020/04/07 16:56:00 UTC
[jira] [Updated] (IGNITE-12549) Scan query/iterator on a replicated
cache may get wrong results
[ https://issues.apache.org/jira/browse/IGNITE-12549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ilya Kasnacheev updated IGNITE-12549:
-------------------------------------
Fix Version/s: (was: 2.9)
2.8.1
> 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
> Assignee: Sergey Kosarev
> Priority: Critical
> Fix For: 2.8.1
>
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> Case 1
> 1. start server node 1
> 2. create and fill replicated cache with RebalanceMode.Async (as by default)
> 3. start servr node 2
> 4. 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
> 4. start server node 3
> 5. 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);
> which is executed in org.apache.ignite.internal.processors.cache.query.GridCacheQueryAdapter#executeScanQuery.
> If executed on a just started node it obviously returns the local node disregarding was it rebalanced or not.
> If executed on a client it returns a random affinity node, so it also can be not yet rebalanced node.
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