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  1. JDK
  2. JDK-8139133

(fs) Changing the modification time on a unix domain socket file fails

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    • Subcomponent:
    • Resolved In Build:
      b97
    • CPU:
      x86
    • OS:
      linux
    • Verification:
      Verified

      Description

      FULL PRODUCT VERSION :
      java version "1.8.0_60"
      Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
      Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Linux debian 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u4 (2015-09-19) x86_64 GNU/Linux

      A DESCRIPTION OF THE PROBLEM :
      We need to change the modification time of all files (including directories, symlinks, fifos and sockets) in a given directory. Trying to change the modification time of a unix domain socket file always fails with the following Exception:

      java.nio.file.FileSystemException: /tmp/mysocket: No such device or address
              at sun.nio.fs.UnixException.translateToIOException(UnixException.java:91)
              at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
              at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
              at sun.nio.fs.UnixPath.openForAttributeAccess(UnixPath.java:787)
              at sun.nio.fs.UnixFileAttributeViews$Basic.setTimes(UnixFileAttributeViews.java:74)


      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Create a unix domain socket file, e.g. with the following command:
      nc -lU /tmp/mysocket
      (note: only the netcat-openbsd variant supports the -U option)

      Then try to run the program given in the test case.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      The program should update the modification time of the socket file because unix domain socket is just a normal file with a modification time that can be changed.
      ACTUAL -
      The exception above is thrown.

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      import java.io.IOException;
      import java.nio.file.FileSystems;
      import java.nio.file.Files;
      import java.nio.file.Path;
      import java.nio.file.attribute.BasicFileAttributeView;
      import java.nio.file.attribute.FileTime;
      import java.util.logging.Level;
      import java.util.logging.Logger;

      public class UnixDomainSocketTest {

          public static void main(String[] args) {
              Path socket = FileSystems.getDefault().getPath("/tmp/mysocket");
              BasicFileAttributeView attributeView = Files.getFileAttributeView(
                      socket, BasicFileAttributeView.class);
              FileTime fileTime = FileTime.fromMillis(System.currentTimeMillis());
              try {
                  attributeView.setTimes(fileTime, null, null);
              } catch (IOException ex) {
                  Logger.getLogger(UnixDomainSocketTest.class.getName()).log(Level.SEVERE, null, ex);
              }
          }
      }
      ---------- END SOURCE ----------

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            Assignee:
            bpb Brian Burkhalter
            Reporter:
            webbuggrp Webbug Group
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              Created:
              Updated:
              Resolved: