FULL PRODUCT VERSION :
java version " 1.7.0_15 "
Java(TM) SE Runtime Environment (build 1.7.0_15-b03)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.2.9200]

A DESCRIPTION OF THE PROBLEM :
. Use the Files.move(from,to,REPLACE_EXISTING) to move a file.
. prepare a text file with " mock content " in that file
. got the error like below sometimes.

Caused by: java.nio.file.FileAlreadyExistsException: G:\apache-tomcat\temp\tmp1540072504027239704.tmp -> G:\share1\0\58bcafba-2f0e-4e81-83e7-34d60b4ac3e9
               at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:81)
               at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
               at sun.nio.fs.WindowsFileCopy.move(WindowsFileCopy.java:387)
               at sun.nio.fs.WindowsFileSystemProvider.move(WindowsFileSystemProvider.java:286)
               at java.nio.file.Files.move(Files.java:1339)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
. Use the Files.move(from,to,REPLACE_EXISTING) to move a file.
. prepare a text file with " mock content " in that file
. got the error like below sometimes.


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Caused by: java.nio.file.FileAlreadyExistsException: G:\apache-tomcat\temp\tmp1540072504027239704.tmp -> G:\share1\0\58bcafba-2f0e-4e81-83e7-34d60b4ac3e9
               at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:81)
               at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
               at sun.nio.fs.WindowsFileCopy.move(WindowsFileCopy.java:387)
               at sun.nio.fs.WindowsFileSystemProvider.move(WindowsFileSystemProvider.java:286)
               at java.nio.file.Files.move(Files.java:1339)


REPRODUCIBILITY :
This bug can be reproduced often.