[jira] Updated: (XERCESC-1350) DTDElementDecl lazy initialization not thread safe.

["Boris Kolpackov (JIRA)" <xe...@xml.apache.org>]

     [ https://issues.apache.org/jira/browse/XERCESC-1350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Boris Kolpackov updated XERCESC-1350:
-------------------------------------

          Component/s:     (was: SAX/SAX2)
    Affects Version/s:     (was: 2.6.0)
                       3.0.1

This problem seems to be still present in 3.0.1.

> DTDElementDecl lazy initialization not thread safe.
> ---------------------------------------------------
>
>                 Key: XERCESC-1350
>                 URL: https://issues.apache.org/jira/browse/XERCESC-1350
>             Project: Xerces-C++
>          Issue Type: Bug
>          Components: Validating Parser (DTD)
>    Affects Versions: 3.0.1
>         Environment: Solaris
>            Reporter: Mark Weissman
>
> DTDElementDecl.cpp && DTDElementDecl.hpp perform lazy evaluation on many
> of the get() methods.  This is used in cached grammars which may
> be shared by multiple threads and accessed unsynchonized.
> Lazy initialization is generally a bad pattern, but particularly in multithreaded
> applications.  It should be disabled for shared grammars.  
> I work around this by calling all the getters when I create my Grammar pool
> but I think this should not be necessary.
> It would be good if somebody could check all the lazy evaluations that might
> affect shared grammars.

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