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https://issues.apache.org/jira/browse/IGNITE-7794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16395377#comment-16395377
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Denis Mekhanikov commented on IGNITE-7794:
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TC run results: 
https://ci.ignite.apache.org/project.html?projectId=IgniteTests24Java8&branch_IgniteTests24Java8=pull%2F3620%2Fhead

> Marshaller mappings are not saved to disk on joining nodes
> ----------------------------------------------------------
>
>                 Key: IGNITE-7794
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7794
>             Project: Ignite
>          Issue Type: Bug
>    Affects Versions: 2.4
>            Reporter: Denis Mekhanikov
>            Assignee: Denis Mekhanikov
>            Priority: Major
>             Fix For: 2.5
>
>         Attachments: GridMarshallerMappingConsistencyTest.java
>
>
> Find attached test class.
> When a node connects to a cluster, that already has some marshaller mappings, 
> they are not saved to disk on the joining node. It may result in "Unknown 
> pair" error, if a cluster has persistence enabled, and a nodes without needed 
> mappings start and try to read persisted data.



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