[jira] [Resolved] (IGNITE-11558) Developer warning when HashMap is passed to putAll()

["Ilya Kasnacheev (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-11558?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ilya Kasnacheev resolved IGNITE-11558.
--------------------------------------
    Resolution: Duplicate

> Developer warning when HashMap is passed to putAll()
> ----------------------------------------------------
>
>                 Key: IGNITE-11558
>                 URL: https://issues.apache.org/jira/browse/IGNITE-11558
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>    Affects Versions: 2.7
>            Reporter: Ilya Kasnacheev
>            Assignee: Ilya Kasnacheev
>            Priority: Major
>
> Currently when HashMap is passed to putAll it's very easy to cause deadlock since the order of keys is not stable.
> This is a pity because users will use HashMap by default and not expect any trouble.
> We should issue a warning when user passes HashMap (but not LinkedHashMap) to putAll(). On .Net we should probably check for Dictionary. Warning similar to the one issues when index cannot be efficiently inlined.
> Another approach is to turn keys into binary form and then sort them, if map is not a SortedMap.



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