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https://issues.apache.org/jira/browse/IGNITE-6804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16952260#comment-16952260
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Pavel Tupitsyn commented on IGNITE-6804:
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[~ilyak] if you add items to a new empty hashtable, the resulting order is
going to be the same every time. And, I guess, this is the most common scenario.
This also indicates a problem with the API. We waste CPU time populating
HashMap or SortedMap, when Ignite only iterates over the result, throwing away
all the hash-related stuff.
Anyway, you can keep "will" if you like, but it is better to be technically
correct (the best kind of correct).
> 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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