コード例 #1
0
  /**
   * Builds a list of arguments to run java.
   *
   * <p>This method finds the java executable to use and appends JVM-specific options for running a
   * class with Spark in the classpath. It also loads options from the "java-opts" file in the
   * configuration directory being used.
   *
   * <p>Callers should still add at least the class to run, as well as any arguments to pass to the
   * class.
   */
  List<String> buildJavaCommand(String extraClassPath) throws IOException {
    List<String> cmd = new ArrayList<String>();
    String envJavaHome;

    if (javaHome != null) {
      cmd.add(join(File.separator, javaHome, "bin", "java"));
    } else if ((envJavaHome = System.getenv("JAVA_HOME")) != null) {
      cmd.add(join(File.separator, envJavaHome, "bin", "java"));
    } else {
      cmd.add(join(File.separator, System.getProperty("java.home"), "bin", "java"));
    }

    // Load extra JAVA_OPTS from conf/java-opts, if it exists.
    File javaOpts = new File(join(File.separator, getConfDir(), "java-opts"));
    if (javaOpts.isFile()) {
      BufferedReader br =
          new BufferedReader(new InputStreamReader(new FileInputStream(javaOpts), "UTF-8"));
      try {
        String line;
        while ((line = br.readLine()) != null) {
          addOptionString(cmd, line);
        }
      } finally {
        br.close();
      }
    }

    cmd.add("-cp");
    cmd.add(join(File.pathSeparator, buildClassPath(extraClassPath)));
    return cmd;
  }
コード例 #2
0
  /**
   * Adds the default perm gen size option for Spark if the VM requires it and the user hasn't set
   * it.
   */
  void addPermGenSizeOpt(List<String> cmd) {
    // Don't set MaxPermSize for IBM Java, or Oracle Java 8 and later.
    if (getJavaVendor() == JavaVendor.IBM) {
      return;
    }
    String[] version = System.getProperty("java.version").split("\\.");
    if (Integer.parseInt(version[0]) > 1 || Integer.parseInt(version[1]) > 7) {
      return;
    }

    for (String arg : cmd) {
      if (arg.startsWith("-XX:MaxPermSize=")) {
        return;
      }
    }

    cmd.add("-XX:MaxPermSize=128m");
  }