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Posted to issues@ignite.apache.org by "Aleksey Plekhanov (Jira)" <ji...@apache.org> on 2023/04/07 06:59:00 UTC

[jira] [Updated] (IGNITE-14532) Thin client: Unordered map used for putAll warning is unavoidable

     [ https://issues.apache.org/jira/browse/IGNITE-14532?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksey Plekhanov updated IGNITE-14532:
---------------------------------------
    Fix Version/s:     (was: 2.15)

> Thin client: Unordered map used for putAll warning is unavoidable
> -----------------------------------------------------------------
>
>                 Key: IGNITE-14532
>                 URL: https://issues.apache.org/jira/browse/IGNITE-14532
>             Project: Ignite
>          Issue Type: New Feature
>          Components: thin client
>            Reporter: Pavel Tupitsyn
>            Assignee: Pavel Tupitsyn
>            Priority: Minor
>
> Thin client uses LinkedHashMap to preserve client-side entry order. Ignite logs a warning and there is no way to fix it for the user:
> {code}
> Unordered map java.util.HashMap is used for putAll operation on cache exact. This can lead to a distributed deadlock. Switch to a sorted map like TreeMap instead.
> {code}
> We should suppress this warning for thin client operations, since it does not make sense. Thin clients have different language-specific APIs, some of them don't even use maps. The same applies to PlatformCache (thick C# & C++).
> We should have an internal method that does not produce a warning, and, ideally, does not require a Map. Using LinkedHashMap as an intermediate collection produces unnecessary overhead and allocations, we could use an array of key-value pairs instead.



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