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https://issues.apache.org/jira/browse/IGNITE-6804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17027412#comment-17027412
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Ignite TC Bot commented on IGNITE-6804:
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{panel:title=Branch: [pull/6976/head] Base: [master] : No blockers 
found!|borderStyle=dashed|borderColor=#ccc|titleBGColor=#D6F7C1}{panel}
[TeamCity *--> Run :: All* 
Results|https://ci.ignite.apache.org/viewLog.html?buildId=4973988&buildTypeId=IgniteTests24Java8_RunAll]

> Print a warning if HashMap is passed into bulk update operations
> ----------------------------------------------------------------
>
>                 Key: IGNITE-6804
>                 URL: https://issues.apache.org/jira/browse/IGNITE-6804
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>            Reporter: Denis A. Magda
>            Assignee: Ilya Kasnacheev
>            Priority: Critical
>              Labels: usability
>          Time Spent: 3h 20m
>  Remaining Estimate: 0h
>
> Ignite newcomers tend to stumble on deadlocks simply because the keys are 
> passed in an unordered HashMap. Propose to do the following:
> * update bulk operations Java docs.
> * print out a warning if not SortedMap (e.g. HashMap, 
> Weak/Identity/Concurrent/Linked HashMap etc) is passed into
> a bulk method (instead of SortedMap) and contains more than 1 element. 
> However, we should make sure that we only print that warning once and not 
> every time the API is called.
> * do not produce warning for explicit optimistic transactions
> More details are here:
> http://apache-ignite-developers.2346864.n4.nabble.com/Re-Ignite-2-0-0-GridUnsafe-unmonitor-td23706.html



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