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From "Stanilovsky Evgeny (Jira)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-13775) U.ReentrantReadWriteLockTracer improper realization.
Date Tue, 01 Dec 2020 10:50:00 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-13775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stanilovsky Evgeny updated IGNITE-13775:
----------------------------------------
    Attachment: screenshot-1.png

> U.ReentrantReadWriteLockTracer improper realization.
> ----------------------------------------------------
>
>                 Key: IGNITE-13775
>                 URL: https://issues.apache.org/jira/browse/IGNITE-13775
>             Project: Ignite
>          Issue Type: Improvement
>          Components: general
>    Affects Versions: 2.9
>            Reporter: Stanilovsky Evgeny
>            Assignee: Stanilovsky Evgeny
>            Priority: Major
>         Attachments: screenshot-1.png
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> ReentrantReadWriteLockTracer accepts ReentrantReadWriteLock as a delegate and stores
delegates for readLock and writeLock. But ReentrantReadWriteLock#isWriteLockedByCurrentThread
uses sync object to evaluate the result instead of writeLock, and ReentrantReadWriteLockTracer
has it's own sync object.
> As a result, if ReentrantReadWriteLockTracer is used to create checkpoint lock (when
IGNITE_PDS_LOG_CP_READ_LOCK_HOLDERS=true), GridCacheDatabaseSharedManager#checkpointLockIsHeldByThread
doesn't work correctly: it returns false when checkpoint lock is acquired.



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