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https://issues.apache.org/jira/browse/IGNITE-6804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16951734#comment-16951734
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Pavel Tupitsyn commented on IGNITE-6804:
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[~ilyak] 

# I've fixed collection class references in the docs (generic specification is 
mandatory there), pushed the branch (hope it's ok for you).
# "will lead to deadlock" is not technically correct, I would change it to "may 
lead to deadlock".
# Yes, we can do it in C# the same way as in Java. But I don't see how the 
warning is "throttled" - looks like it will be displayed on every operation, am 
I missing something?

 

> 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: 10m
>  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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