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https://issues.apache.org/jira/browse/IGNITE-8587?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitriy Pavlov updated IGNITE-8587:
-----------------------------------
    Fix Version/s:     (was: 2.6)
                   2.7

> High Contention in GridToStringBuilder.toStringImpl  
> -----------------------------------------------------
>
>                 Key: IGNITE-8587
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8587
>             Project: Ignite
>          Issue Type: Bug
>    Affects Versions: 2.4
>            Reporter: Sergey Kosarev
>            Assignee: Sergey Kosarev
>            Priority: Major
>             Fix For: 2.7
>
>
> org.apache.ignite.internal.util.tostring.GridToStringBuilder#classCache 
> implemented as 
> ordinal HashMap with all operations syncronised by one ReadWriteLock.
> this can trigger high contention as this class widely used in toString() 
> methods.
> For instance it shoots when DEBUG or TRACE logs are  enabled as count of 
> toString() invocations increases in this case extremely.
> We need to use ConcurrentHashMap instead and avoid global locks.



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