Re: [xml] xmlParseFile Deadlock

[Daniel Veillard <veillard redhat com>]

On Wed, Jun 27, 2007 at 04:42:12PM +1000, Rhys Palmer wrote:
> Hi all,
>
> I'm using libxml2-2.6.6-3.x86_64 on RHEL3.
> I am trying to write a program in c that receives URLs to XML files from a
> database and then creates a thread for each row.
> I'm getting a deadlock when 2 threads call xmlParseFile at the same time.
>
> I call xmlInitParser() before creating the threads.

  sounds right.

[...]
> #1  0x0000002a965cf310 in xmlRMutexLock () from /usr/lib64/libxml2.so.2
> #2  0x0000002a965cb5fd in xmlParseCatalogFile () from
> /usr/lib64/libxml2.so.2

  looks like a race in the catalog code. There is a testThread.c case in
recent versions to check this kind of things, and that's part of normal
regression tests,

> The backtrace is the same for each locked thread.
> If two threads call xmlParseFile at different times everything works.
>
> The thread code looks like
[...]
> Am I doing something wrong here? Thanks for any help.

  no probably a bug fixed in recent versions. Try with a new version to
see if this fixes it,

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Daniel , with my libxml2 hat on, not the red one !

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