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https://issues.apache.org/jira/browse/IGNITE-8162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16462248#comment-16462248
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Denis Garus commented on IGNITE-8162:
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[~ivan.glukos], I suggest following error message without recomendation of user
activity:
An error occurred given cache configuration loading from given file
[name="cache_name", file="absolute_file_path"]
> Handle ClassNotFoundException during deserialization of persisted cache
> configuration
> --------------------------------------------------------------------------------------
>
> Key: IGNITE-8162
> URL: https://issues.apache.org/jira/browse/IGNITE-8162
> Project: Ignite
> Issue Type: Improvement
> Components: general
> Affects Versions: 2.4
> Reporter: Ivan Rakov
> Assignee: Denis Garus
> Priority: Major
> Labels: newbie
> Fix For: 2.6
>
>
> Ticket is created according to dev list discussion:
> http://apache-ignite-developers.2346864.n4.nabble.com/Fwd-Data-Loss-while-upgrading-custom-jar-from-old-jar-in-server-and-client-nodes-td28808.html
> Cache configuration is serialized by JDK marshaller and persisted in
> cache_data.dat file. It may contain instances of classes that disappeared
> from runtime classpath (e.g. if implementation of CacheStore has been
> renamed). In such case, node will fail on start.
> We should handle this and show meaningful message with instruction how to
> overcome this issue - delete cache_data.dat and restart cache.
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