[jira] [Assigned] (IGNITE-15043) FifoQueueCollisionSPI Should Be Thread Safe

["Atri Sharma (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-15043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Atri Sharma reassigned IGNITE-15043:
------------------------------------

    Assignee: Atri Sharma

> FifoQueueCollisionSPI Should Be Thread Safe
> -------------------------------------------
>
>                 Key: IGNITE-15043
>                 URL: https://issues.apache.org/jira/browse/IGNITE-15043
>             Project: Ignite
>          Issue Type: Bug
>            Reporter: Atri Sharma
>            Assignee: Atri Sharma
>            Priority: Major
>
> Today, if there is a single slot available in the active jobs limit and N tasks come concurrently, there is a chance that many (or all) of them will be able to proceed because the logic of FifoQueueCollisionSPI is as follows:
> 1. Get active tasks count
> 2. Compare to max tasks count
> 3. If less, start the task
> This is not thread safe, and we need to provide a realistic view of active tasks count to all threads.
>  
>  



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