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https://issues.apache.org/jira/browse/IGNITE-5795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17217863#comment-17217863
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Pavel Tupitsyn commented on IGNITE-5795:
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[~ashapkin] [~akalashnikov] the fix assumes that key/val classes are present on
all nodes, which is not true in a lot of cases, thin or thick, Java or not.
> Binary metadata is not registered during start of cache
> -------------------------------------------------------
>
> Key: IGNITE-5795
> URL: https://issues.apache.org/jira/browse/IGNITE-5795
> Project: Ignite
> Issue Type: Bug
> Components: binary, sql
> Affects Versions: 2.0
> Reporter: Dmitry Karachentsev
> Assignee: Anton Kalashnikov
> Priority: Major
> Labels: usability
> Fix For: 2.8
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> When cache configured with QueryEntity and used key type with
> @AffinityKeyMapped field, it will be ignored and wrong partition calculated.
> This happens because QueryEntity processing precedes key type registering in
> binary meta cache. On that step
> CacheObjectBinaryProcessorImpl#affinityKeyField called and unable to resolve
> type, so null returned and null putted in affKeyFields.
> On next put/get operation CacheObjectBinaryProcessorImpl#affinityKeyField
> will return null from affKeyFields, but should be affinity key field.
> Test that reproduces problem in [PR
> 2330|https://github.com/apache/ignite/pull/2330]
> To wrorkaround the issue, set IgniteConfiguration#setKeyConfiguration(), it
> will force registering key.
> *Root cause of this behaviour* is that in during cache registration
> registration of metadata doesn't happen. It lead to exchange messages like
> (MappingProposedMessage, MetadataRequestMessage etc.) which are often
> redundant and also lead to behaviour described above(unhandled
> AffinityKeyMapped).
> Main idea to fix this problem it is registration of metadata locally in
> during cache start on each node without messages exchange.
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