gistfile1.txt

Title: Files are not flushed to disk unless explicitly 'close'd

Open files are not flushed to disk when an application exits. If the .close method is used, the files are correctly written to disk.

This little test-case illustrates the problem:

  out = File.new('foobar', 'w')
  out.write('hi')
  out.puts

Once this script has been executed by JRuby the foobar file will be empty. When the script is executed with MRI (1.8.7) the file contains the expected "hi\n". If out.close is used both JRuby and MRI will produce a file with the correct content.

I do not know whether this is a bug in JRuby or in MRI.

I found this inconsistency both in JRuby 1.3.1 and 1.4-RC1.