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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=8289

transcoder map is not thread safe on SMP machines

           Summary: transcoder map is not thread safe on SMP machines
           Product: Xerces-C++
           Version: 1.7.0
          Platform: PC
        OS/Version: Windows NT/2K
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Non-Validating Parser
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]
                CC: [EMAIL PROTECTED]


Firstly, this may be a "feature" and well known, and not a bug at all. However, 
it came as a shock to me, so I thought it useful to report. 

I had many (~100) DOMParser instances, each of which was accessed by its own 
separate thread. During a "parse" call, eventually (after about 5 minutes of 
continuous use of all threads running), I would start getting the exception 
thrown, "Could not create a converter for encoding: ..."

I eventually traced this to the function "XMLPlatformUtils::fgTransService-
>makeNewTranscoderFor" returning NULL. This was caused by fCPMap in 
Win32TransService becoming corrupted somehow! 

The quick fix was to place a thread-mutex (critical_section) around the "parse" 
function, so that no two parsers were parsing at the same time.

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