当我想开始工作时，我使用hadoop，它总是需要我为16个节点中的3个节点提供连接密码，其中13个工作正常 this is the output it stops until i add the password
我尝试将它们复制到主节点，但问题仍然是16个中的3个奴隶??? !!!!
ssh-copy-id -i $HOME/.ssh/id_rsa.pub hduser@slavei
注意：我在＆＃34; slavei＆＃34;意思是奴隶号码。
答案 0 :(得分：2)
您需要在提示输入密码import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.*;
@SuppressWarnings("serial")
public class Chat2 extends JPanel {
private static final int ROWS = 25; // rows in the chat view JTextArea
private static final int COLS = 40; // columns in the chat view JTextArea
// and text entry area
private static final int ENTRY_ROWS = 4; // rows in the text entry JTextArea
private static final int BL_HGAP = 10; // horizontal gap for our
// BorderLayout
private static final int BL_VGAP = 5; // vertical gap for our BorderLayout
private static final int EB_GAP = 15; // gap for empty border that goes
// around entire app
private static final String TITLE_TEXT = "My Chat Application";
private static final float TITLE_POINTS = 32f; // size of the title jlabel
// text
private JTextArea chatViewArea = new JTextArea(ROWS, COLS);
private JTextArea textEntryArea = new JTextArea(ENTRY_ROWS, COLS);
public Chat2() {
// label to display the title in bold large text
JLabel titleLabel = new JLabel(TITLE_TEXT, SwingConstants.CENTER);
titleLabel.setFont(titleLabel.getFont().deriveFont(Font.BOLD, TITLE_POINTS));
// set up the chat view JTextArea to have word wrap
// and to not be focusable
chatViewArea.setWrapStyleWord(true);
chatViewArea.setLineWrap(true);
chatViewArea.setFocusable(false);
// add it to a JScrollPane, and give the scrollpane vertical scrollbars
JScrollPane viewScrollPane = new JScrollPane(chatViewArea);
viewScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
// set up the text entry JTextArea
textEntryArea.setWrapStyleWord(true);
textEntryArea.setLineWrap(true);
// key bindings so that control-enter will act as enter and the enter key will "submit"
// the user input to the chat window and the chat server
// will allow us to use a multilined text entry area if desired instead
// of a single lined JTextField
setEnterKeyBinding(textEntryArea);
JScrollPane entryScrollPane = new JScrollPane(textEntryArea);
entryScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
// add an empty border around entire application
setBorder(BorderFactory.createEmptyBorder(EB_GAP, EB_GAP, EB_GAP, EB_GAP));
// make the main layout a BorderLayout
setLayout(new BorderLayout(BL_HGAP, BL_VGAP));
// add our components to the GUI
add(titleLabel, BorderLayout.PAGE_START);
add(viewScrollPane, BorderLayout.CENTER);
add(entryScrollPane, BorderLayout.PAGE_END);
}
// Again, use key bindings so that control-enter JTextArea will act as enter key
// and the enter key will "submit" the user input to the chat window and the chat server.
// When ctrl-enter is pushed the Action originally bound to the enter key will be called
// and when enter is pushed a new Action, the EnterKeyAction, will be called
private void setEnterKeyBinding(JTextArea textArea) {
int condition = JComponent.WHEN_FOCUSED; // only for focused entry key
InputMap inputMap = textArea.getInputMap(condition);
ActionMap actionMap = textArea.getActionMap();
KeyStroke entryKeyStroke = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0);
KeyStroke ctrlEntryKeyStroke = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, KeyEvent.CTRL_DOWN_MASK);
// first give ctrl-enter the action held by enter
Object entryKey = inputMap.get(entryKeyStroke);
Action entryAction = actionMap.get(entryKey);
inputMap.put(ctrlEntryKeyStroke, ctrlEntryKeyStroke.toString());
actionMap.put(ctrlEntryKeyStroke.toString(), entryAction);
// now give enter key a new Action
EnterKeyAction enterKeyAction = new EnterKeyAction();
inputMap.put(entryKeyStroke, entryKeyStroke.toString());
actionMap.put(entryKeyStroke.toString(), enterKeyAction);
}
public void appendToChatArea(final String text) {
if (SwingUtilities.isEventDispatchThread()) {
chatViewArea.append(text + "\n");
} else {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
chatViewArea.append(text + "\n");
}
});
}
}
private class EnterKeyAction extends AbstractAction {
@Override
public void actionPerformed(ActionEvent e) {
String text = textEntryArea.getText();
textEntryArea.setText("");
chatViewArea.append("User: " + text + "\n");
// TODO send text to the chat server!
}
}
private static void createAndShowGui() {
Chat2 mainPanel = new Chat2();
JFrame frame = new JFrame("My Chat Window");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(mainPanel);
// pack the JFrame so that it will size itself to its components
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
，chmod 700 ~/.ssh和chmod 600 ~/.ssh/id_rsa
.ssh上的权限受到损害，这就是它提示输入密码的原因。
答案 1 :(得分：0)
检查有问题的服务器上的/etc/ssh/sshd_config文件，查找属性 PubkeyAuthentication ，应将其设置为是。
同时检查 AllowUsers 属性的设置，如果它处于活动状态，请验证hduser是否已添加到允许的用户列表中。
更改配置文件后，您可以重新加载配置文件或重新启动ssh服务器以获得反映的更改。
希望这有帮助。