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