Package org.apache.hadoop.util.Shell

Examples of org.apache.hadoop.util.Shell.ShellCommandExecutor.execute()

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     * @throws IOException
     */
    public void runScript(List<String> args, File dir) throws IOException {
      ShellCommandExecutor shexec =
              new ShellCommandExecutor(args.toArray(new String[0]), dir);
      shexec.execute();
      int exitCode = shexec.getExitCode();
      if (exitCode != 0) {
        throw new IOException("Task debug script exit with nonzero status of "
                              + exitCode + ".");
      }
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  private static boolean isAlive(String pid) throws IOException {
    String commandString ="ps -o pid,command -e";
    String args[] = new String[] {"bash", "-c" , commandString};
    ShellCommandExecutor shExec = new ShellCommandExecutor(args);
    try {
      shExec.execute();
    }catch(ExitCodeException e) {
      return false;
    } catch (IOException e) {
      LOG.warn("IOExecption thrown while checking if process is alive" +
          StringUtils.stringifyException(e));
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    ShellCommandExecutor shexec =
        new ShellCommandExecutor(wrappedCommand.toArray(new String[0]),
                                  env.workDir, env.env);
    // set the ShellCommandExecutor for later use.
    context.shExec = shexec;
    shexec.execute();
  }
   
  /**
   * Initialize the task environment.
   *
 
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    // 24 or something else if some other bugs are also present.
    String[] taskControllerCmd =
        new String[] { getTaskControllerExecutablePath() };
    ShellCommandExecutor shExec = new ShellCommandExecutor(taskControllerCmd);
    try {
      shExec.execute();
    } catch (ExitCodeException e) {
      int exitCode = shExec.getExitCode();
      if (exitCode != 1) {
        LOG.warn("Exit code from checking binary permissions is : " + exitCode);
        logOutput(shExec.getOutput());
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                                    TaskControllerCommands.LAUNCH_TASK_JVM,
                                    env.conf.getUser(),
                                    launchTaskJVMArgs, env.workDir, env.env);
    context.shExec = shExec;
    try {
      shExec.execute();
    } catch (Exception e) {
      int exitCode = shExec.getExitCode();
      LOG.warn("Exit code from task is : " + exitCode);
      // 143 (SIGTERM) and 137 (SIGKILL) exit codes means the task was
      // terminated/killed forcefully. In all other cases, log the
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    ShellCommandExecutor shExec =
        buildTaskControllerExecutor(taskControllerCommand, user, cmdArgs,
                                    workDir, env);
    try {
      shExec.execute();
    } catch (Exception e) {
      LOG.warn("Exit code from " + taskControllerCommand.toString() + " is : "
          + shExec.getExitCode());
      LOG.warn("Exception thrown by " + taskControllerCommand.toString() + " : "
          + StringUtils.stringifyException(e));
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    ShellCommandExecutor shExec = buildTaskControllerExecutor(
        command, context.env.conf.getUser(),
        buildKillTaskCommandArgs(context), context.env.workDir,
        context.env.env);
    try {
      shExec.execute();
    } catch (Exception e) {
      LOG.warn("Output from task-contoller is : " + shExec.getOutput());
      throw new IOException(e);
    }
  }
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    ShellCommandExecutor shexec = null;
    boolean setsidSupported = true;
    try {
      String[] args = {"setsid", "bash", "-c", "echo $$"};
      shexec = new ShellCommandExecutor(args);
      shexec.execute();
    } catch (IOException ioe) {
      LOG.warn("setsid is not available on this machine. So not using it.");
      setsidSupported = false;
    } finally { // handle the exit code
      LOG.info("setsid exited with exit code " + shexec.getExitCode());
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  public static void terminateProcess(String pid) {
    ShellCommandExecutor shexec = null;
    try {
      String[] args = { "kill", pid };
      shexec = new ShellCommandExecutor(args);
      shexec.execute();
    } catch (IOException ioe) {
      LOG.warn("Error executing shell command " + ioe);
    } finally {
      LOG.info("Killing process " + pid +
               " with SIGTERM. Exit code " + shexec.getExitCode());
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  public static void terminateProcessGroup(String pgrpId) {
    ShellCommandExecutor shexec = null;
    try {
      String[] args = { "kill", "--", "-" + pgrpId };
      shexec = new ShellCommandExecutor(args);
      shexec.execute();
    } catch (IOException ioe) {
      LOG.warn("Error executing shell command " + ioe);
    } finally {
      LOG.info("Killing all processes in the process group " + pgrpId +
               " with SIGTERM. Exit code " + shexec.getExitCode());
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