[xml] Deadlock in catalog.c?

[Mark Van Peteghem <Mark Van Peteghem telenet be>]

Hi,

I'm stuck on what looks like a deadlock in libxml2.

My application calls xmlInitializeCatalog() and xmlLoadCatalog(...) 
(which returns 0) in the main thread. Then another thread is launched in 
which I do XML validation with DTDs. These work fine until a XML file 
refers to a DTD that has to be looked up in the catalog file that I 
loaded with xmlLoadCatalog(...): then the thread blocks when trying to 
lock xmlCatalogMutex (catalog.c, line 1416 in the function 
xmlFetchXMLCatalogFile). The strange thing is that there are no other 
threads doing any locking (except for the thread created by libxml2 that 
waits in xmlGlobalStateCleanupHelper).

I noticed that if I do the same XML validation on the main thread, it 
works fine, and after that it works on the other thread as well.


Regards,

--
 Mark
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