FULL PRODUCT VERSION :
java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
unmarshaller.unmarshal(new File("C:\SomeDir#\Foo.xml")) fails with FileNotFoundException even, if the file exists. Seems that javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal( File f ) does not properly url-escape the path, when converting the file object to the url.

There was already an discussion about this issue in 2009, but it seems that no bug was filed.

See: https://community.oracle.com/thread/1626574?start=0&tstart=0


REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
Construct a FileInpuStream from File and call unmarshal( java.io.InputStream is )