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From "Nathan Beyer (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HARMONY-1936) [classlib][rmi] improper class loader creation in DefaultRMIClassLoaderSpi due to race condition
Date Wed, 25 Oct 2006 01:20:17 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-1936?page=all ]

Nathan Beyer resolved HARMONY-1936.
-----------------------------------

    Resolution: Fixed

That's a good call; we definitely want to keep expensive operations out of the synchronized
block.

I've applied the patch and resolving the issue. Please verify it. Thanks.

> [classlib][rmi] improper class loader creation in DefaultRMIClassLoaderSpi due to race
condition
> ------------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-1936
>                 URL: http://issues.apache.org/jira/browse/HARMONY-1936
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>         Environment: IA32, WinXP
>            Reporter: Mikhail Markov
>         Assigned To: Nathan Beyer
>         Attachments: DefaultRMIClassLoaderSpi.1.patch, DefaultRMIClassLoaderSpi.patch
>
>
> I've identified that DefaultRMIClassLoaderSpi sometimes creates 2 different URLClassLoaders
(inside the class) for the same codebase. This is due to the gap between the moments of checking
of inner hashtable with created loaders and table updating with new created loaders when 2
threads could enter at the same time.
> Unfortunately, i was not able to provide a stand-alone simple reproducer for this bug,
but it is reproducible on heavy multi-threading application.
> The patch will come... It is easy understandable so i hope it demonstrates the problem
by itself. 

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