Introduce thread safety to SAML schema read #727
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Problem
As the related PR below, use of Dir.chdir is not thread-safe. This usage was causing exceptions to be raised when running on Puma and in other multi-threaded environments.
Related:
How to fix
This patch replaces
Dir.chdirwith thread-safeFile.openmethod.Additional information
This patch also removes
@@mutex, which became unnecessary.