FileNotFoundException on opening FileOutputStream on same file read using java nio?

Stephen C told you to unmap the buffer. However, here is a link to STILL OPEN ( from 2002 ) request for MappedBybeBuffer. Unmap method.It has a few workarounds suggested, so you may try them.

You need to explicitly unmap the region that you mapped with the FileChannel. Map(...) call. The Javadoc for map(...) says this: A mapping, once established, is not dependent upon the file channel that was used to create it.

Closing the channel, in particular, has no effect upon the validity of the mapping.

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