JDK-4470017 : (fs) FileChannel.transfer{From,To} methods broken for large files (spec)
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.nio
  • Affected Version: 1.4.0
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2001-06-14
  • Updated: 2001-12-03
  • Resolved: 2001-12-03
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Other
1.4.0 rc1Fixed
Related Reports
Relates :  
JDK-4638365 - (fs) FileChannel.transfer{From,To}, {Scatter,Gather}ingByteChannel & large files
Description

Name: bsC130419			Date: 06/14/2001


java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)

The second argument to the transferTo() and transferFrom() methods in the
FileChannel class is type int, whereas FileChannel size() method returns type
long. It is not unreasonable to expect to be able to request the transfer of
all the bytes in the file by passing the value returned by size(). Requiring a
cast to int really precludes its safe use in this context.
(Review ID: 126561) 
======================================================================
Comments
CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: merlin-rc1 FIXED IN: merlin-rc1 INTEGRATED IN: merlin-rc1
14-06-2004
WORK AROUND Name: bsC130419 Date: 06/14/2001 Cast the file length to type int. ======================================================================
11-06-2004
EVALUATION There is a slightly deeper problem here, namely that the transfer{From,To} methods should be useful on large (> 2GB) files. For consistency and ease-of-use we should also revise the map method's size argument to be a long; that way all count/size parameters to FileChannel methods will be longs. -- ###@###.### 2001/11/13
11-09-0179