Package org.apache.hadoop.util.Shell

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

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    ShellCommandExecutor shexec = null;
    String errMsg = null;
    try {
      String[] args = { "kill", pid };
      shexec = new ShellCommandExecutor(args);
      shexec.execute();
    } catch (IOException ioe) {
      // Do nothing, we log the exit code in the finally block.
      errMsg = ioe.getMessage();
    } finally {
      LOG.info("Killing process " + pid +
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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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      return;
    }
    String[] args = { "kill", "-9", pid };
    ShellCommandExecutor shexec = new ShellCommandExecutor(args);
    try {
      shexec.execute();
    } catch (IOException e) {
      LOG.warn("Error sending SIGKILL to process "+ pid + " ."+
          StringUtils.stringifyException(e));
    } finally {
      LOG.info("Killing process " + pid + " with SIGKILL. Exit code "
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    }

    String[] args = { "kill", "-9", "-"+pgrpId };
    ShellCommandExecutor shexec = new ShellCommandExecutor(args);
    try {
      shexec.execute();
    } catch (IOException e) {
      LOG.warn("Error sending SIGKILL to process group "+ pgrpId + " ."+
          StringUtils.stringifyException(e));
    } finally {
      LOG.info("Killing process group" + pgrpId + " with SIGKILL. Exit code "
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  public static boolean isAlive(String pid) {
    ShellCommandExecutor shexec = null;
    try {
      String[] args = { "kill", "-0", pid };
      shexec = new ShellCommandExecutor(args);
      shexec.execute();
    } catch (ExitCodeException ee) {
      return false;
    } catch (IOException ioe) {
      LOG.warn("Error executing shell command "
          + Arrays.toString(shexec.getExecString()) + ioe);
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  public static boolean isProcessGroupAlive(String pgrpId) {
    ShellCommandExecutor shexec = null;
    try {
      String[] args = { "kill", "-0", "-"+pgrpId };
      shexec = new ShellCommandExecutor(args);
      shexec.execute();
    } catch (ExitCodeException ee) {
      return false;
    } catch (IOException ioe) {
      LOG.warn("Error executing shell command "
          + Arrays.toString(shexec.getExecString()) + ioe);
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    } else {
      untarCommand.append(FileUtil.makeShellPath(inFile));
    }
    String[] shellCmd = { "bash", "-c", untarCommand.toString() };
    ShellCommandExecutor shexec = new ShellCommandExecutor(shellCmd);
    shexec.execute();
    int exitcode = shexec.getExitCode();
    if (exitcode != 0) {
      throw new IOException("Error untarring file " + inFile +
                  ". Tar process exited with exit code " + exitcode);
    }
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    cmdBuf.append(perm).append(" ");
    cmdBuf.append(filename);
    String[] shellCmd = {"bash", "-c" ,cmdBuf.toString()};
    ShellCommandExecutor shExec = new ShellCommandExecutor(shellCmd);
    try {
      shExec.execute();
    }catch(IOException e) {
      if(Log.isDebugEnabled()) {
        Log.debug("Error while changing permission : " + filename
            +" Exception: " + StringUtils.stringifyException(e));
      }
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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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    }

    public void start(String newConfLocation) throws IOException {
      ShellCommandExecutor cme = buildCommandExecutor(START_COMMAND,
          newConfLocation);
      cme.execute();
      String output = cme.getOutput();
      if (!output.isEmpty()) { //getOutput() never returns null value
        if (output.toLowerCase().contains("error")) {
          LOG.warn("Error is detected.");
          throw new IOException("Start error\n" + output);
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