Olabusayo Kilo created DAFFODIL-3009:
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Summary: SchematonValidator is not threadsafe
Key: DAFFODIL-3009
URL: https://issues.apache.org/jira/browse/DAFFODIL-3009
Project: Daffodil
Issue Type: Bug
Components: Back End
Affects Versions: 3.11.0
Reporter: Olabusayo Kilo
I _think_ SchematronValidator is not thread safe. makeValidator is required to
return something that is thread safe.
This creates a Schematron object which creates a Transformer. And the javadoc
says transformer is not thread safe.
So I think the transformer needs to be wrapped in a ThreadLocal or something.
it does wrap the XMLReader in a ThreadLocal, but it only gets an instance from
that ThreadLocal when it initially creates the Schematron object, which is
shared among threads. So I don't think the use of the XMLReader works probably.
Context: https://github.com/apache/daffodil/pull/1479#discussion_r2183499387
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