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  1. JDK
  2. JDK-8233957

When using java.lang.Process with pipeline, destroy() cannot stop child process

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    • Icon: Bug Bug
    • Resolution: Cannot Reproduce
    • Icon: P4 P4
    • None
    • 8u211
    • core-libs
    • x86_64
    • os_x

      ADDITIONAL SYSTEM INFORMATION :
      ProductName: Mac OS X
      ProductVersion: 10.15.1
      BuildVersion: 19B88

      java version "1.8.0_211"
      Java(TM) SE Runtime Environment (build 1.8.0_211-b12)
      Java HotSpot(TM) 64-Bit Server VM (build 25.211-b12, mixed mode)

      A DESCRIPTION OF THE PROBLEM :
      I use process execute a command [tail -f test.log | grep test],when i call destroy, only stop the parent process, but the child process not stop.

      REGRESSION : Last worked in version 8

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      code :
       public static void main(String[] args) throws IOException {
              ProcessBuilder processBuilder = new ProcessBuilder()
                      .directory(new File("/Users/leix.xie/logs"))
                      .redirectErrorStream(true)
                      .command("/bin/bash", "-c", "tail -f test.txt|stdbuf -o0 grep 1");
              final Process process = processBuilder.start();
              InputStream stream = process.getInputStream();
              byte[] bytes = new byte[1024];
              new Thread(new Runnable() {
                  @Override
                  public void run() {
                      try {
                          Thread.sleep(1000 * 60);
                      } catch (InterruptedException e) {
                          e.printStackTrace();
                      }
                      process.destroyForcibly();
                      System.out.println("destroy");
                  }
              }).start();
              while (true) {
                  int read = stream.read(bytes);
                  if (read == -1) {
                      break;
                  }
                  System.out.println(Arrays.copyOfRange(bytes, 0, read));
              }
          }


      run the method of main
      the java process will start 3 process in the os
       501 5760 5758 0 12:04下午 ?? 0:00.00 /bin/bash -c tail -f test.txt|stdbuf -o0 grep 1
       501 5761 5760 0 12:04下午 ?? 0:00.00 tail -f test.txt
       501 5762 5760 0 12:04下午 ?? 0:00.00 grep 1

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      6000ms later, I hope the three process has been stoped
      ACTUAL -
        501 5761 1 0 12:04下午 ?? 0:00.00 tail -f test.txt
        501 5762 1 0 12:04下午 ?? 0:00.00 grep 1

      only the parent process stoped

      ---------- BEGIN SOURCE ----------
      import java.io.File;
      import java.io.IOException;
      import java.io.InputStream;
      import java.util.Arrays;

      /**
       * @author leix.xie
       * @date 2019/11/11 11:38
       * @describe
       */
      public class ProcessTest {
          public static void main(String[] args) throws IOException {
              ProcessBuilder processBuilder = new ProcessBuilder()
                      .directory(new File("/Users/leix.xie/logs"))
                      .redirectErrorStream(true)
                      .command("/bin/bash", "-c", "tail -f test.txt|stdbuf -o0 grep 1");
              final Process process = processBuilder.start();
              InputStream stream = process.getInputStream();
              byte[] bytes = new byte[1024];
              new Thread(new Runnable() {
                  @Override
                  public void run() {
                      try {
                          Thread.sleep(1000 * 60);
                      } catch (InterruptedException e) {
                          e.printStackTrace();
                      }
                      process.destroyForcibly();
                      System.out.println("destroy");
                  }
              }).start();
              while (true) {
                  int read = stream.read(bytes);
                  if (read == -1) {
                      break;
                  }
                  System.out.println(Arrays.copyOfRange(bytes, 0, read));
              }
          }
      }

      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      i have no workaround

      FREQUENCY : always


            rriggs Roger Riggs
            webbuggrp Webbug Group
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              Created:
              Updated:
              Resolved: