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  1. JDK
  2. JDK-5056395

nio does not seem to work with Linux kernel 2.6.4 (and probably above)

    Details

    • Subcomponent:
    • Resolved In Build:
      b56
    • CPU:
      x86
    • OS:
      linux, linux_suse_sles_8

      Backports

        Description

        Apparently nio does not really like to work here:-( I tested this on SuSE 9.1pro (with stock kernel) but we had problem reports from a Mandrake 10 user (with 2.6.* kernel too).

        Thanks,
        -- Marco


        marco@linux:/tmp> cat FileCopyTest.java
        import java.io.File;
        import java.io.FileInputStream;
        import java.io.FileOutputStream;
        import java.io.IOException;
        import java.nio.channels.FileChannel;

        public class FileCopyTest {

            public static void main(String[] args) {
                File a = new File("/tmp/a");
                File b = new File("/tmp/b");

                copyFile(a, b);
            } // end of main()

            public static void copyFile(File source, File dest){
                try {
                    FileChannel in = new FileInputStream(source).getChannel();
                    if(!dest.getParentFile().exists()) dest.getParentFile().mkdirs();
                    FileChannel out = new FileOutputStream(dest).getChannel();
                    in.transferTo(0, in.size(), out);
                    in.close();
                    out.close();
                }
                catch ( IOException e ) {
                    e.printStackTrace();
                }
            }
        }
        marco@linux:/tmp> cp -p ~/snapshot1.png /tmp/a
        marco@linux:/tmp> java FileCopyTest
        java.io.IOException: Invalid argument
                at sun.nio.ch.FileChannelImpl.transferTo0(Native Method)
                at sun.nio.ch.FileChannelImpl.transferToDirectly(FileChannelImpl.java:392)
                at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:487)
                at FileCopyTest.copyFile(FileCopyTest.java:21)
                at FileCopyTest.main(FileCopyTest.java:13)
        marco@linux:/tmp> type java
        java is hashed (/usr/lib/java/bin/java)
        marco@linux:/tmp> java -version
        java version "1.4.2_03"
        Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_03-b02)
        Java HotSpot(TM) Client VM (build 1.4.2_03-b02, mixed mode)
        marco@linux:/tmp> ~/Creator/java/bin/java -version
        java version "1.4.2_04"
        Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
        Java HotSpot(TM) Client VM (build 1.4.2_04-b05, mixed mode)
        marco@linux:/tmp> ~/Creator/java/bin/java FileCopyTest
        java.io.IOException: Invalid argument
                at sun.nio.ch.FileChannelImpl.transferTo0(Native Method)
                at sun.nio.ch.FileChannelImpl.transferToDirectly(FileChannelImpl.java:392)
                at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:487)
                at FileCopyTest.copyFile(FileCopyTest.java:21)
                at FileCopyTest.main(FileCopyTest.java:13)
        marco@linux:/tmp> uname -a
        Linux linux 2.6.4-54.5-bigsmp #1 SMP Fri May 7 21:54:56 UTC 2004 i686 i686 i386 GNU/Linux
        marco@linux:/tmp> cat /etc/SuSE-release
        SuSE Linux 9.1 (i586)
        VERSION = 9.1

        ###@###.### 2004-06-02

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                • Assignee:
                  mmcclosksunw Michael Mccloskey (Inactive)
                  Reporter:
                  mwalther Marco Walther
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                  • Created:
                    Updated:
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