Examples with NoRouteToHostException java.net.NoRouteToHostException used on opensource projects

Example 21 with NoRouteToHostException

use of java.net.NoRouteToHostException in project opennms by OpenNMS.

the class MemcachedMonitor method poll.

/**
     * {@inheritDoc}
     *
     * Poll the specified address for Memcached service availability.
     */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    TimeoutTracker timeoutTracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    int port = ParameterMap.getKeyedInteger(parameters, "port", DEFAULT_PORT);
    // Extract the address
    InetAddress ipv4Addr = svc.getAddress();
    String host = InetAddressUtils.str(ipv4Addr);
    LOG.debug("polling interface: {} {}", host, timeoutTracker);
    PollStatus serviceStatus = PollStatus.unavailable();
    for (timeoutTracker.reset(); timeoutTracker.shouldRetry() && !serviceStatus.isAvailable(); timeoutTracker.nextAttempt()) {
        Socket socket = null;
        try {
            timeoutTracker.startAttempt();
            socket = new Socket();
            socket.connect(new InetSocketAddress(ipv4Addr, port), timeoutTracker.getConnectionTimeout());
            socket.setSoTimeout(timeoutTracker.getSoTimeout());
            LOG.debug("connected to host: {} on port: {}", host, port);
            // We're connected, so upgrade status to unresponsive
            serviceStatus = PollStatus.unresponsive();
            OutputStreamWriter osw = new OutputStreamWriter(socket.getOutputStream(), StandardCharsets.UTF_8);
            osw.write("stats\n");
            osw.flush();
            // Allocate a line reader
            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            Map<String, Number> statProps = new LinkedHashMap<String, Number>();
            for (String key : m_keys) {
                statProps.put(key, null);
            }
            String line = null;
            do {
                line = reader.readLine();
                if (line == null)
                    break;
                String[] statEntry = line.trim().split("\\s", 3);
                if (statEntry[0].equals("STAT")) {
                    try {
                        Number value;
                        if (statEntry[2].contains(".")) {
                            value = Double.parseDouble(statEntry[2]);
                        } else {
                            value = Long.parseLong(statEntry[2]);
                        }
                        String key = statEntry[1].toLowerCase();
                        key = key.replaceAll("_", "");
                        if (key.length() > 19) {
                            key = key.substring(0, 19);
                        }
                        if (statProps.containsKey(key)) {
                            statProps.put(key, value);
                        }
                    } catch (Throwable e) {
                    // ignore errors parsing
                    }
                } else if (statEntry[0].equals("END")) {
                    serviceStatus = PollStatus.available();
                    osw.write("quit\n");
                    osw.flush();
                    break;
                }
            } while (line != null);
            serviceStatus.setProperties(statProps);
            serviceStatus.setResponseTime(timeoutTracker.elapsedTimeInMillis());
        } catch (ConnectException e) {
            // Connection refused!! Continue to retry.
            String reason = "Connection refused by host " + host;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (NoRouteToHostException e) {
            // No route to host!! Try retries anyway in case strict timeouts are enabled
            String reason = "Unable to test host " + host + ", no route available";
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (InterruptedIOException e) {
            String reason = "did not connect to host " + host + " within timeout: " + timeoutTracker;
            LOG.debug(reason);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (IOException e) {
            String reason = "Error communicating with host " + host;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (Throwable t) {
            String reason = "Undeclared throwable exception caught contacting host " + host;
            LOG.debug(reason, t);
            serviceStatus = PollStatus.unavailable(reason);
        } finally {
            try {
                if (socket != null) {
                    socket.close();
                    socket = null;
                }
            } catch (IOException e) {
            }
        }
    }
    //
    return serviceStatus;
}

Example 22 with NoRouteToHostException

use of java.net.NoRouteToHostException in project opennms by OpenNMS.

the class Pop3Monitor method poll.

/**
     * {@inheritDoc}
     *
     * <P>
     * Poll the specified address for POP3 service availability.
     * </P>
     *
     * <P>
     * During the poll an attempt is made to connect on the specified port (by
     * default TCP port 110). If the connection request is successful, the
     * banner line generated by the interface is parsed and if the response
     * indicates that we are talking to an POP3 server we continue. Next, a POP3
     * 'QUIT' command is sent to the interface. Again the response is parsed and
     * verified. Provided that the interface's response is valid we set the
     * service status to SERVICE_AVAILABLE and return.
     * </P>
     */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    // Process parameters
    //
    TimeoutTracker tracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    int port = ParameterMap.getKeyedInteger(parameters, "port", DEFAULT_PORT);
    InetAddress ipAddr = svc.getAddress();
    LOG.debug("poll: address = {}, port = {}, {}", ipAddr, port, tracker);
    PollStatus serviceStatus = PollStatus.unavailable();
    for (tracker.reset(); tracker.shouldRetry() && !serviceStatus.isAvailable(); tracker.nextAttempt()) {
        Socket socket = null;
        final String hostAddress = InetAddressUtils.str(ipAddr);
        try {
            //
            // create a connected socket
            //
            tracker.startAttempt();
            socket = new Socket();
            socket.connect(new InetSocketAddress(ipAddr, port), tracker.getConnectionTimeout());
            socket.setSoTimeout(tracker.getSoTimeout());
            LOG.debug("Pop3Monitor: connected to host: {} on port: {}", ipAddr, port);
            // We're connected, so upgrade status to unresponsive
            serviceStatus = PollStatus.unresponsive();
            BufferedReader rdr = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            //
            // Tokenize the Banner Line, and check the first
            // line for a valid return.
            //
            // Server response should start with: "+OK"
            //
            String banner = rdr.readLine();
            double responseTime = tracker.elapsedTimeInMillis();
            if (banner == null)
                continue;
            StringTokenizer t = new StringTokenizer(banner);
            if (t.nextToken().equals("+OK")) {
                //
                // POP3 server should recoginize the QUIT command
                //
                String cmd = "QUIT\r\n";
                socket.getOutputStream().write(cmd.getBytes());
                //
                // Parse the response to the QUIT command
                //
                // Server response should start with: "+OK"
                //
                t = new StringTokenizer(rdr.readLine());
                if (t.nextToken().equals("+OK")) {
                    serviceStatus = PollStatus.available(responseTime);
                }
            }
            // the banner checking or QUIT command process.
            if (!serviceStatus.isAvailable()) {
                serviceStatus = PollStatus.unavailable();
            }
        } catch (NoRouteToHostException e) {
            String reason = "No route to host exception for address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (InterruptedIOException e) {
            String reason = "did not connect to host with " + tracker;
            LOG.debug(reason);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (ConnectException e) {
            String reason = "Connection exception for address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (IOException e) {
            String reason = "IOException while polling address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } finally {
            try {
                // Close the socket
                if (socket != null)
                    socket.close();
            } catch (IOException e) {
                LOG.debug("poll: Error closing socket.", e);
            }
        }
    }
    //
    return serviceStatus;
}

Example 23 with NoRouteToHostException

use of java.net.NoRouteToHostException in project opennms by OpenNMS.

the class ImapMonitor method poll.

/**
     * {@inheritDoc}
     *
     * <P>
     * Poll the specified address for IMAP service availability.
     * </P>
     *
     * <P>
     * During the poll an attempt is made to connect on the specified port (by
     * default TCP port 143). If the connection request is successful, the
     * banner line generated by the interface is parsed and if it starts with a '*
     * OK , it indicates that we are talking to an IMAP server and we continue.
     * Next, a 'LOGOUT' command is sent to the interface. Again the response is
     * parsed and the response is verified to see that we get a '* OK'. If the
     * interface's response is valid we set the service status to
     * SERVICE_AVAILABLE and return.
     * </P>
     */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    // Process parameters
    //
    TimeoutTracker tracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    // Retries
    //
    final int port = determinePort(parameters);
    // Get interface address from NetworkInterface
    //
    InetAddress ipAddr = svc.getAddress();
    LOG.debug("ImapMonitor.poll: address: {} port: {} {}", ipAddr, port, tracker);
    PollStatus serviceStatus = PollStatus.unavailable();
    for (tracker.reset(); tracker.shouldRetry() && !serviceStatus.isAvailable(); tracker.nextAttempt()) {
        Socket socket = null;
        try {
            //
            // create a connected socket
            //
            tracker.startAttempt();
            socket = new Socket();
            socket.connect(new InetSocketAddress(ipAddr, port), tracker.getConnectionTimeout());
            socket.setSoTimeout(tracker.getSoTimeout());
            // We're connected, so upgrade status to unresponsive
            serviceStatus = PollStatus.unresponsive();
            // For SSL support
            socket = getSocketWrapper().wrapSocket(socket);
            BufferedReader rdr = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            //
            // Tokenize the Banner Line, and check the first
            // line for a valid return.
            //
            String banner = rdr.readLine();
            double responseTime = tracker.elapsedTimeInMillis();
            LOG.debug("ImapMonitor.Poll(): banner: {}", banner);
            if (banner != null && banner.startsWith(IMAP_START_RESPONSE_PREFIX)) {
                //
                // Send the LOGOUT
                //
                socket.getOutputStream().write(IMAP_LOGOUT_REQUEST.getBytes());
                //
                // get the returned string, tokenize, and
                // verify the correct output.
                //
                String response = rdr.readLine();
                if (response != null && response.startsWith(IMAP_BYE_RESPONSE_PREFIX)) {
                    response = rdr.readLine();
                    if (response != null && response.startsWith(IMAP_LOGOUT_RESPONSE_PREFIX)) {
                        serviceStatus = PollStatus.available(responseTime);
                    }
                }
            }
            // the banner checking or logout process.
            if (!serviceStatus.isAvailable()) {
                serviceStatus = PollStatus.unavailable();
            }
        } catch (NoRouteToHostException e) {
            String reason = "No route to host exception for address: " + ipAddr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (ConnectException e) {
            // Connection refused. Continue to retry.
            String reason = "Connection exception for address: " + ipAddr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (InterruptedIOException e) {
            String reason = "did not connect to host with " + tracker;
            LOG.debug(reason);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (IOException e) {
            String reason = "IOException while polling address: " + ipAddr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } finally {
            try {
                // Close the socket
                if (socket != null)
                    socket.close();
            } catch (IOException e) {
                e.fillInStackTrace();
                LOG.debug("ImapMonitor.poll: Error closing socket.", e);
            }
        }
    }
    //
    return serviceStatus;
}

Example 24 with NoRouteToHostException

use of java.net.NoRouteToHostException in project opennms by OpenNMS.

the class TrivialTimeMonitor method pollTimeUdp.

/**
     * <p>pollTimeUdp</p>
     *
     * @param svc a {@link org.opennms.netmgt.poller.MonitoredService} object.
     * @param parameters a {@link java.util.Map} object.
     * @param serviceStatus a {@link org.opennms.netmgt.poller.PollStatus} object.
     * @param tracker a {@link org.opennms.core.utils.TimeoutTracker} object.
     * @param ipv4Addr a {@link java.net.InetAddress} object.
     * @param port a int.
     * @param allowedSkew a int.
     * @param persistSkew a boolean.
     * @return a {@link org.opennms.netmgt.poller.PollStatus} object.
     */
public PollStatus pollTimeUdp(MonitoredService svc, Map<String, Object> parameters, PollStatus serviceStatus, TimeoutTracker tracker, InetAddress ipv4Addr, int port, int allowedSkew, boolean persistSkew) {
    int localTime = 0;
    int remoteTime = 0;
    boolean gotTime = false;
    for (tracker.reset(); tracker.shouldRetry() && !gotTime; tracker.nextAttempt()) {
        DatagramSocket socket = null;
        final String hostAddress = InetAddressUtils.str(ipv4Addr);
        try {
            tracker.startAttempt();
            socket = new DatagramSocket();
            socket.setSoTimeout(tracker.getSoTimeout());
            LOG.debug("Requesting time from host: {} on UDP port: {}", ipv4Addr, port);
            //
            // Send an empty datagram per RFC868
            //
            socket.send(new DatagramPacket(new byte[] {}, 0, ipv4Addr, port));
            //
            // Try to receive a response from the remote socket
            //
            byte[] timeBytes = new byte[4];
            ByteBuffer timeByteBuffer = ByteBuffer.wrap(timeBytes);
            DatagramPacket timePacket = new DatagramPacket(timeBytes, timeBytes.length, ipv4Addr, port);
            socket.receive(timePacket);
            int bytesRead = timePacket.getLength();
            if (bytesRead != 4)
                continue;
            LOG.debug("pollTimeUdp: bytes read = {}", bytesRead);
            try {
                remoteTime = timeByteBuffer.getInt();
            } catch (BufferUnderflowException bue) {
                LOG.error("Encountered buffer underflow while reading time from remote socket.");
                remoteTime = 0;
                serviceStatus = PollStatus.unavailable("Failed to read a valid time from remote host.");
                // to next iteration of for() loop
                continue;
            }
            localTime = (int) (System.currentTimeMillis() / 1000) - EPOCH_ADJ_FACTOR;
            gotTime = true;
            serviceStatus = qualifyTime(remoteTime, localTime, allowedSkew, serviceStatus, tracker.elapsedTimeInMillis(), persistSkew);
        } catch (PortUnreachableException e) {
            String reason = "Port unreachable exception for address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (NoRouteToHostException e) {
            String reason = "No route to host exception for address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (InterruptedIOException e) {
            String reason = "did not connect to host with " + tracker;
            LOG.debug(reason);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (IOException e) {
            String reason = "IOException while polling address: " + ipv4Addr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } finally {
            if (socket != null)
                socket.close();
        }
    }
    return serviceStatus;
}

Example 25 with NoRouteToHostException

use of java.net.NoRouteToHostException in project opennms by OpenNMS.

the class NtpMonitor method poll.

/**
     * {@inheritDoc}
     *
     * <P>
     * Poll the specified address for NTP service availability.
     * </P>
     *
     * <P>
     * During the poll an NTP request query packet is generated. The query is
     * sent via UDP socket to the interface at the specified port (by default
     * UDP port 123). If a response is received, it is parsed and validated. If
     * the NTP was successful the service status is set to SERVICE_AVAILABLE and
     * the method returns.
     * </P>
     */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    // get the parameters
    //
    TimeoutTracker tracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    int port = ParameterMap.getKeyedInteger(parameters, "port", DEFAULT_PORT);
    // get the address and NTP address request
    //
    InetAddress ipAddr = svc.getAddress();
    PollStatus serviceStatus = PollStatus.unavailable();
    DatagramSocket socket = null;
    double responseTime = -1.0;
    try {
        socket = new DatagramSocket();
        // will force the
        socket.setSoTimeout(tracker.getSoTimeout());
        for (tracker.reset(); tracker.shouldRetry() && !serviceStatus.isAvailable(); tracker.nextAttempt()) {
            try {
                // Send NTP request
                //
                byte[] data = new NtpMessage().toByteArray();
                DatagramPacket outgoing = new DatagramPacket(data, data.length, ipAddr, port);
                tracker.startAttempt();
                socket.send(outgoing);
                // Get NTP Response
                //
                // byte[] buffer = new byte[512];
                DatagramPacket incoming = new DatagramPacket(data, data.length);
                socket.receive(incoming);
                responseTime = tracker.elapsedTimeInMillis();
                double destinationTimestamp = (System.currentTimeMillis() / 1000.0) + 2208988800.0;
                // Validate NTP Response
                // IOException thrown if packet does not decode as expected.
                NtpMessage msg = new NtpMessage(incoming.getData());
                double localClockOffset = ((msg.receiveTimestamp - msg.originateTimestamp) + (msg.transmitTimestamp - destinationTimestamp)) / 2;
                LOG.debug("poll: valid NTP request received the local clock offset is {}, responseTime= {}ms", localClockOffset, responseTime);
                LOG.debug("poll: NTP message : {}", msg);
                serviceStatus = PollStatus.available(responseTime);
            } catch (InterruptedIOException ex) {
            // Ignore, no response received.
            }
        }
    } catch (NoRouteToHostException e) {
        String reason = "No route to host exception for address: " + ipAddr;
        LOG.debug(reason, e);
        serviceStatus = PollStatus.unavailable(reason);
    } catch (ConnectException e) {
        String reason = "Connection exception for address: " + ipAddr;
        LOG.debug(reason, e);
        serviceStatus = PollStatus.unavailable(reason);
    } catch (IOException ex) {
        String reason = "IOException while polling address: " + ipAddr;
        LOG.debug(reason, ex);
        serviceStatus = PollStatus.unavailable(reason);
    } finally {
        if (socket != null)
            socket.close();
    }
    //
    return serviceStatus;
}