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https://issues.apache.org/jira/browse/IGNITE-6804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17031613#comment-17031613
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Andrey N. Gura commented on IGNITE-6804:
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[~ilyak] Ok. I think the logic is too overwhelmed. Moreover, it doesn't matter
whether deadlock detection enabled or not. Unsafe API usage is still could lead
to deadlocks and performance degradation. So we can simplify conditions under
which warning about deadlocks possibility tested. Let's just remove this check.
> 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: 5h 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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