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From "Yaokai Jiang (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-3673) NativeFSLockFactory Race Condition
Date Wed, 04 Jan 2012 01:02:39 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-3673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yaokai Jiang updated LUCENE-3673:
---------------------------------

    Lucene Fields: New,Patch Available  (was: New)
    
> NativeFSLockFactory Race Condition
> ----------------------------------
>
>                 Key: LUCENE-3673
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3673
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: core/store
>    Affects Versions: 3.4, 3.5
>         Environment: Mac OS X 10.7, JDK 1.6
> CentOS 5, JDK 1.7u1
>            Reporter: Yaokai Jiang
>            Priority: Critical
>              Labels: concurrency, locking
>         Attachments: BreakIt.java, LUCENE-3673.patch
>
>
> When the NativeFSLock releases, it deletes the lock file after lock release.
> In a concurrent situation, it is possible for another thread or process to acquire the
lock before the delete happens. Any other third thread or process will then be able to recreate
the lock file and acquire the lock while a lock is already held on the deleted file. 

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