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

Example 11 with NoRouteToHostException

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

the class SmtpMonitor method poll.

/**
     * {@inheritDoc}
     *
     * <P>
     * Poll the specified address for SMTP service availability.
     * </P>
     *
     * <P>
     * During the poll an attempt is made to connect on the specified port (by
     * default TCP port 25). If the connection request is successful, the banner
     * line generated by the interface is parsed and if the extracted return
     * code indicates that we are talking to an SMTP server we continue. Next,
     * an SMTP 'HELO' command is sent to the interface. Again the response is
     * parsed and a return code extracted and verified. Finally, an SMTP 'QUIT'
     * command is sent. 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) {
    TimeoutTracker tracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    int port = ParameterMap.getKeyedInteger(parameters, "port", DEFAULT_PORT);
    InetAddress ipAddr = svc.getAddress();
    final String hostAddress = InetAddressUtils.str(ipAddr);
    LOG.debug("poll: address = {}, port = {}, {}", hostAddress, 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());
            LOG.debug("SmtpMonitor: connected to host: {} on port: {}", ipAddr, port);
            // We're connected, so upgrade status to unresponsive
            serviceStatus = PollStatus.unresponsive();
            // Forcing to check for CRLF instead of any other line terminator as per RFC specification
            CRLFLineReader rdr = new CRLFLineReader(new InputStreamReader(socket.getInputStream(), "ASCII"));
            //
            // Tokenize the Banner Line, and check the first
            // line for a valid return.
            //
            String banner = sendMessage(socket, rdr, null);
            LOG.debug("poll: banner = {}", banner);
            StringTokenizer t = new StringTokenizer(banner);
            int rc = Integer.parseInt(t.nextToken());
            if (rc == 220) {
                //
                // Send the HELO command
                //
                String cmd = "HELO " + LOCALHOST_NAME + "\r\n";
                socket.getOutputStream().write(cmd.getBytes());
                //
                // get the returned string, tokenize, and
                // verify the correct output.
                //
                String response = rdr.readLine();
                double responseTime = tracker.elapsedTimeInMillis();
                if (response == null) {
                    continue;
                }
                if (MULTILINE.matcher(response).find()) {
                    // Ok we have a multi-line response...first three
                    // chars of the response line are the return code.
                    // The last line of the response will start with
                    // return code followed by a space.
                    String multiLineRC = new String(response.getBytes("ASCII"), 0, 3, "ASCII");
                    // Create new regExp to look for last line
                    // of this multi line response
                    Pattern endMultiline = null;
                    try {
                        endMultiline = Pattern.compile(multiLineRC);
                    } catch (PatternSyntaxException ex) {
                        throw new java.lang.reflect.UndeclaredThrowableException(ex);
                    }
                    // response
                    do {
                        response = rdr.readLine();
                    } while (response != null && !endMultiline.matcher(response).find());
                    if (response == null) {
                        continue;
                    }
                }
                t = new StringTokenizer(response);
                rc = Integer.parseInt(t.nextToken());
                if (rc == 250) {
                    response = sendMessage(socket, rdr, "QUIT\r\n");
                    t = new StringTokenizer(response);
                    rc = Integer.parseInt(t.nextToken());
                    if (rc == 221) {
                        serviceStatus = PollStatus.available(responseTime);
                    }
                }
            } else if (rc == 554) {
                String response = sendMessage(socket, rdr, "QUIT\r\n");
                serviceStatus = PollStatus.unavailable("Server rejecting transactions with 554");
            }
            // checking or HELO/QUIT comand process.
            if (!serviceStatus.isAvailable()) {
                serviceStatus = PollStatus.unavailable(serviceStatus.getReason());
            }
        } catch (NumberFormatException e) {
            String reason = "NumberFormatException while polling 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);
            // Break out of for(;;)
            break;
        } catch (InterruptedIOException e) {
            String reason = "Did not receive expected response within timeout " + tracker;
            LOG.debug(reason);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (ConnectException e) {
            String reason = "Unable to connect to 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) {
                e.fillInStackTrace();
                LOG.debug("poll: Error closing socket.", e);
            }
        }
    }
    //
    return serviceStatus;
}

Example 12 with NoRouteToHostException

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

the class SSLCertMonitor method poll.

/**
     * {@inheritDoc}
     *
     * Poll the specified address for HTTP service availability.
     *
     * During the poll an attempt is made to connect on the specified port. If
     * the connection request is successful, check the X509Certificates provided
     * by our peer and check that our time is between the certificates start and
     * end time.
     * Provided that the interface's response is valid we set the service status to
     * SERVICE_AVAILABLE and return.
     */
@Override
public PollStatus poll(final MonitoredService svc, final Map<String, Object> parameters) {
    TimeoutTracker tracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    // Port
    int port = ParameterMap.getKeyedInteger(parameters, PARAMETER_PORT, DEFAULT_PORT);
    if (port == DEFAULT_PORT) {
        throw new RuntimeException("Required parameter 'port' is not present in supplied properties.");
    }
    // Remaining days
    int validityDays = ParameterMap.getKeyedInteger(parameters, PARAMETER_DAYS, DEFAULT_DAYS);
    if (validityDays <= 0) {
        throw new RuntimeException("Required parameter 'days' must be a positive value.");
    }
    // Server name (optional)
    final String serverName = PropertiesUtils.substitute(ParameterMap.getKeyedString(parameters, PARAMETER_SERVER_NAME, ""), getServiceProperties(svc));
    // Calculate validity range
    Calendar calValid = this.getCalendarInstance();
    Calendar calCurrent = this.getCalendarInstance();
    calValid.setTimeInMillis(calCurrent.getTimeInMillis());
    calValid.add(Calendar.DAY_OF_MONTH, validityDays);
    Calendar calBefore = this.getCalendarInstance();
    Calendar calAfter = this.getCalendarInstance();
    // Get the address instance
    InetAddress ipAddr = svc.getAddress();
    final String hostAddress = InetAddressUtils.str(ipAddr);
    LOG.debug("poll: address={}, port={}, serverName={}, {}", hostAddress, port, serverName, tracker);
    // Give it a whirl
    PollStatus serviceStatus = PollStatus.unavailable();
    for (tracker.reset(); tracker.shouldRetry() && !serviceStatus.isAvailable(); tracker.nextAttempt()) {
        Socket socket = null;
        try {
            tracker.startAttempt();
            socket = new Socket();
            socket.connect(new InetSocketAddress(ipAddr, port), tracker.getConnectionTimeout());
            socket.setSoTimeout(tracker.getSoTimeout());
            LOG.debug("Connected to host: {} on port: {}", ipAddr, port);
            SSLSocket sslSocket = SocketUtils.wrapSocketInSslContext(socket, null, null);
            // We're connected, so upgrade status to unresponsive
            serviceStatus = PollStatus.unresponsive();
            // Use the server name as as SNI host name if available
            if (!Strings.isNullOrEmpty(serverName)) {
                final SSLParameters sslParameters = sslSocket.getSSLParameters();
                sslParameters.setServerNames(ImmutableList.of(new SNIHostName(serverName)));
                sslSocket.setSSLParameters(sslParameters);
                // Check certificates host name
                if (!new StrictHostnameVerifier().verify(serverName, sslSocket.getSession())) {
                    serviceStatus = PollStatus.unavailable("Host name verification failed - certificate common name is invalid");
                    continue;
                }
            }
            Certificate[] certs = sslSocket.getSession().getPeerCertificates();
            for (int i = 0; i < certs.length && !serviceStatus.isAvailable(); i++) {
                if (certs[i] instanceof X509Certificate) {
                    X509Certificate certx = (X509Certificate) certs[i];
                    LOG.debug("Checking validity against dates: [current: {}, valid: {}], NotBefore: {}, NotAfter: {}", calCurrent.getTime(), calValid.getTime(), certx.getNotBefore(), certx.getNotAfter());
                    calBefore.setTime(certx.getNotBefore());
                    calAfter.setTime(certx.getNotAfter());
                    if (calCurrent.before(calBefore)) {
                        LOG.debug("Certificate is invalid, current time is before start time");
                        serviceStatus = PollStatus.unavailable("Certificate is invalid, current time is before start time");
                        break;
                    } else if (calCurrent.before(calAfter)) {
                        if (calValid.before(calAfter)) {
                            LOG.debug("Certificate is valid, and does not expire before validity check date");
                            serviceStatus = PollStatus.available(tracker.elapsedTimeInMillis());
                            break;
                        } else {
                            String reason = "Certificate is valid, but will expire in " + validityDays + " days.";
                            LOG.debug(reason);
                            serviceStatus = PollStatus.unavailable(reason);
                            break;
                        }
                    } else {
                        LOG.debug("Certificate has expired.");
                        serviceStatus = PollStatus.unavailable("Certificate has expired.");
                        break;
                    }
                }
            }
        } catch (NoRouteToHostException e) {
            String reason = "No route to host exception for address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
            // Break out of for(;;)
            break;
        } 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: " + ipAddr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (IOException e) {
            String reason = "IOException while polling address: " + ipAddr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } finally {
            try {
                if (socket != null) {
                    socket.close();
                }
            } catch (IOException e) {
                e.fillInStackTrace();
                LOG.debug("poll: Error closing socket.", e);
            }
        }
    }
    return serviceStatus;
}

Example 13 with NoRouteToHostException

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

the class HttpMonitor method poll.

/**
     * {@inheritDoc}
     *
     * Poll the specified address for HTTP service availability.
     *
     * During the poll an attempt is made to connect on the specified port(s) (by default TCP
     * ports 80, 8080, 8888). If the connection request is successful, an HTTP 'GET' command is
     * sent to the interface. The response is parsed and a return code extracted and verified.
     * Provided that the interface's response is valid we set the service status to
     * SERVICE_AVAILABLE and return.
     */
@Override
public PollStatus poll(final MonitoredService svc, final Map<String, Object> parameters) {
    final InetAddress addr = svc.getAddress();
    final String nodeLabel = svc.getNodeLabel();
    // Cycle through the port list
    //
    int currentPort = -1;
    final HttpMonitorClient httpClient = new HttpMonitorClient(nodeLabel, addr, new TreeMap<String, Object>(parameters));
    for (int portIndex = 0; portIndex < determinePorts(httpClient.getParameters()).length && httpClient.getPollStatus() != PollStatus.SERVICE_AVAILABLE; portIndex++) {
        currentPort = determinePorts(httpClient.getParameters())[portIndex];
        httpClient.setTimeoutTracker(new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT));
        LOG.debug("Port = {}, Address = {}, {}", currentPort, addr, httpClient.getTimeoutTracker());
        httpClient.setCurrentPort(currentPort);
        String serviceInfo = new StringBuilder(addr.toString()).append(":").append(svc.getSvcName()).append(":").append(currentPort).toString();
        for (httpClient.getTimeoutTracker().reset(); httpClient.getTimeoutTracker().shouldRetry() && httpClient.getPollStatus() != PollStatus.SERVICE_AVAILABLE; httpClient.getTimeoutTracker().nextAttempt()) {
            try {
                httpClient.getTimeoutTracker().startAttempt();
                httpClient.connect();
                LOG.debug("HttpMonitor: connected to host: {} on port: {}", addr, currentPort);
                httpClient.sendHttpCommand();
                if (httpClient.isEndOfStream()) {
                    continue;
                }
                httpClient.setResponseTime(httpClient.getTimeoutTracker().elapsedTimeInMillis());
                logResponseTimes(httpClient.getResponseTime(), httpClient.getCurrentLine());
                if (httpClient.getPollStatus() == PollStatus.SERVICE_AVAILABLE && StringUtils.isNotBlank(httpClient.getResponseText())) {
                    httpClient.setPollStatus(PollStatus.SERVICE_UNAVAILABLE);
                    httpClient.readLinedMatching();
                    if (httpClient.isEndOfStream()) {
                        continue;
                    }
                    httpClient.read();
                    if (!httpClient.isResponseTextFound()) {
                        String message = "Matching text: [" + httpClient.getResponseText() + "] not found in body of HTTP response for " + serviceInfo;
                        LOG.debug(message);
                        httpClient.setReason("Matching text: [" + httpClient.getResponseText() + "] not found in body of HTTP response");
                    }
                }
            } catch (NoRouteToHostException e) {
                LOG.warn("checkStatus: No route to host exception while polling {}", serviceInfo, e);
                // Will cause outer for(;;) to terminate
                portIndex = determinePorts(httpClient.getParameters()).length;
                httpClient.setReason("No route to host exception");
            } catch (SocketTimeoutException e) {
                LOG.info("checkStatus: HTTP socket connection for service {} timed out with {}", serviceInfo, httpClient.getTimeoutTracker().toString());
                httpClient.setReason("HTTP connection timeout");
            } catch (InterruptedIOException e) {
                LOG.info(String.format("checkStatus: HTTP connection for service {} interrupted after {} bytes transferred with {}", serviceInfo, e.bytesTransferred, httpClient.getTimeoutTracker().toString()), e);
                httpClient.setReason(String.format("HTTP connection interrupted, %d bytes transferred", e.bytesTransferred));
            } catch (ConnectException e) {
                LOG.warn("Connection exception for {}", serviceInfo, e);
                httpClient.setReason("HTTP connection exception on port: " + determinePorts(httpClient.getParameters())[portIndex] + ": " + e.getMessage());
            } catch (IOException e) {
                String exceptionClass = e.getClass().getSimpleName();
                LOG.warn("{} while polling {}", exceptionClass, serviceInfo, e);
                httpClient.setReason("IOException while polling address: " + addr + ": " + e.getMessage());
            } catch (Throwable e) {
                String exceptionClass = e.getClass().getSimpleName();
                LOG.warn("Unexpected {} while polling {}", exceptionClass, serviceInfo, e);
                httpClient.setReason("Unexpected exception while polling address: " + addr + ": " + e.getMessage());
            } finally {
                httpClient.closeConnection();
            }
        }
    // end for (attempts)
    }
    // end for (ports)
    return httpClient.determinePollStatusResponse();
}

Example 14 with NoRouteToHostException

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

the class LdapMonitor method poll.

/**
     * {@inheritDoc}
     *
     * Poll the specified address for service availability.
     *
     * During the poll an attempt is made to connect the service.
     *
     * Provided that the interface's response is valid we set the service status
     * to SERVICE_AVAILABLE and return.
     */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    int serviceStatus = PollStatus.SERVICE_UNAVAILABLE;
    String reason = null;
    final TimeoutTracker tracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    // get the parameters
    //
    final int ldapVersion = ParameterMap.getKeyedInteger(parameters, "version", LDAPConnection.LDAP_V3);
    final int ldapPort = determinePort(parameters);
    final String searchBase = ParameterMap.getKeyedString(parameters, "searchbase", DEFAULT_BASE);
    final String searchFilter = ParameterMap.getKeyedString(parameters, "searchfilter", DEFAULT_FILTER);
    final String password = (String) parameters.get("password");
    final String ldapDn = (String) parameters.get("dn");
    String address = InetAddrUtils.str(svc.getAddress());
    // first just try a connection to the box via socket. Just in case there
    // is
    // a no way to route to the address, don't iterate through the retries,
    // as a
    // NoRouteToHost exception will only be thrown after about 5 minutes,
    // thus tying
    // up the thread
    Double responseTime = null;
    Socket socket = null;
    try {
        socket = new Socket();
        socket.connect(new InetSocketAddress(svc.getAddress(), ldapPort), tracker.getConnectionTimeout());
        socket.setSoTimeout(tracker.getSoTimeout());
        LOG.debug("LdapMonitor: connected to host: {} on port: {}", address, ldapPort);
        // We're connected, so upgrade status to unresponsive
        serviceStatus = PollStatus.SERVICE_UNRESPONSIVE;
        if (socket != null)
            socket.close();
        // lets detect the service
        LDAPConnection lc = new LDAPConnection(new TimeoutLDAPSocket(tracker.getSoTimeout()));
        for (tracker.reset(); tracker.shouldRetry() && !(serviceStatus == PollStatus.SERVICE_AVAILABLE); tracker.nextAttempt()) {
            LOG.debug("polling LDAP on {}, {}", address, tracker);
            // connect to the ldap server
            tracker.startAttempt();
            try {
                lc.connect(address, ldapPort);
                LOG.debug("connected to LDAP server {} on port {}", address, ldapPort);
            } catch (LDAPException e) {
                LOG.debug("could not connect to LDAP server {} on port {}", address, ldapPort);
                reason = "could not connect to LDAP server " + address + " on port " + ldapPort;
                continue;
            }
            // bind if possible
            if (ldapDn != null && password != null) {
                try {
                    lc.bind(ldapVersion, ldapDn, password.getBytes());
                    LOG.debug("bound to LDAP server version {} with distinguished name {}", ldapVersion, ldapDn);
                    LOG.debug("poll: responseTime= {}ms", tracker.elapsedTimeInMillis());
                } catch (LDAPException e) {
                    try {
                        lc.disconnect();
                    } catch (LDAPException ex) {
                        LOG.debug(ex.getMessage());
                    }
                    LOG.debug("could not bind to LDAP server version {} with distinguished name {}", ldapVersion, ldapDn);
                    reason = "could not bind to LDAP server version " + ldapVersion + " with distinguished name " + ldapDn;
                    continue;
                }
            }
            // do a quick search and see if any results come back
            boolean attributeOnly = true;
            String[] attrs = { LDAPConnection.NO_ATTRS };
            int searchScope = LDAPConnection.SCOPE_ONE;
            LOG.debug("running search {} from {}", searchFilter, searchBase);
            LDAPSearchResults results = null;
            int msLimit = (int) tracker.getTimeoutInMillis();
            int serverLimit = (int) tracker.getTimeoutInSeconds() + 1;
            LDAPSearchConstraints cons = new LDAPSearchConstraints(msLimit, serverLimit, // dereference: default = never
            LDAPSearchConstraints.DEREF_NEVER, // maxResults: default = 1000
            1000, // doReferrals: default = false
            false, // batchSize: default = 1
            1, // handler: default = null
            null, // hop_limit: default = 10
            10);
            try {
                results = lc.search(searchBase, searchScope, searchFilter, attrs, attributeOnly, cons);
                if (results != null && results.hasMore()) {
                    responseTime = tracker.elapsedTimeInMillis();
                    LOG.debug("search yielded {} result(s)", results.getCount());
                    serviceStatus = PollStatus.SERVICE_AVAILABLE;
                } else {
                    LOG.debug("no results found from search");
                    reason = "No results found from search";
                    serviceStatus = PollStatus.SERVICE_UNAVAILABLE;
                }
            } catch (LDAPException e) {
                try {
                    lc.disconnect();
                } catch (LDAPException ex) {
                    LOG.debug(ex.getMessage());
                }
                LOG.debug("could not perform search {} from {}", searchFilter, searchBase);
                reason = "could not perform search " + searchFilter + " from " + searchBase;
                continue;
            }
            try {
                lc.disconnect();
                LOG.debug("disconected from LDAP server {} on port {}", address, ldapPort);
            } catch (LDAPException e) {
                LOG.debug(e.getMessage());
            }
        }
    } catch (ConnectException e) {
        LOG.debug("connection refused to host {}", address, e);
        reason = "connection refused to host " + address;
    } catch (NoRouteToHostException e) {
        LOG.debug("No route to host {}", address, e);
        reason = "No route to host " + address;
    } catch (InterruptedIOException e) {
        LOG.debug("did not connect to host with {}", tracker);
        reason = "did not connect to host with " + tracker;
    } catch (Throwable t) {
        LOG.debug("An undeclared throwable exception caught contacting host {}", address, t);
        reason = "An undeclared throwable exception caught contacting host " + address;
    }
    return PollStatus.get(serviceStatus, reason, responseTime);
}

Example 15 with NoRouteToHostException

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

the class FtpMonitor method poll.

// read()
/**
     * {@inheritDoc}
     *
     * Poll the specified address for FTP service availability.
     *
     * During the poll an attempt is made to connect on the specified port (by
     * default TCP port 21). If the connection request is successful, the banner
     * line generated by the interface is parsed and if the extracted return
     * code indicates that we are talking to an FTP server we continue. Next, an
     * FTP 'QUIT' command is sent. Provided that the interface's response is
     * valid we set the service status to SERVICE_AVAILABLE and return.
     */
@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);
    String userid = ParameterMap.getKeyedString(parameters, "userid", null);
    String password = ParameterMap.getKeyedString(parameters, "password", null);
    // Extract the address
    InetAddress ipAddr = svc.getAddress();
    PollStatus serviceStatus = PollStatus.unavailable();
    for (tracker.reset(); tracker.shouldRetry() && !serviceStatus.isAvailable(); tracker.nextAttempt()) {
        LOG.debug("FtpMonitor.poll: Polling interface: {} {}", InetAddressUtils.str(ipAddr), tracker);
        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());
            LOG.debug("FtpMonitor: connected to host: {} on port: {}", ipAddr, port);
            // We're connected, so upgrade status to unresponsive
            serviceStatus = PollStatus.unresponsive();
            BufferedReader lineRdr = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            FtpResponse bannerResponse = FtpResponse.readResponse(lineRdr);
            if (bannerResponse.isSuccess()) {
                // Attempt to login if userid and password available
                boolean loggedInSuccessfully = false;
                LOG.debug("FtpMonitor: Banner response successful.");
                if (userid == null || userid.length() == 0 || password == null || password.length() == 0) {
                    loggedInSuccessfully = true;
                } else {
                    FtpResponse.sendCommand(socket, "USER " + userid);
                    FtpResponse userResponse = FtpResponse.readResponse(lineRdr);
                    if (userResponse.isSuccess() || userResponse.isIntermediate()) {
                        LOG.debug("FtpMonitor: User response successful.");
                        FtpResponse.sendCommand(socket, "PASS " + password);
                        FtpResponse passResponse = FtpResponse.readResponse(lineRdr);
                        if (passResponse.isSuccess()) {
                            LOG.debug("FtpMonitor.poll: Login successful, parsed return code: {}", passResponse.getCode());
                            loggedInSuccessfully = true;
                        } else {
                            LOG.debug("FtpMonitor.poll: Login failed, parsed return code: {}, full response: {}", passResponse.getCode(), passResponse);
                            loggedInSuccessfully = false;
                        }
                    }
                }
                // Store the response time before we try to quit
                double responseTime = tracker.elapsedTimeInMillis();
                if (loggedInSuccessfully) {
                    FtpResponse.sendCommand(socket, "QUIT");
                    FtpResponse quitResponse = FtpResponse.readResponse(lineRdr);
                    /*
                         * Special Cases for success:
                         * 
                         * Also want to accept the following
                         * ERROR message generated by some FTP servers
                         * following a QUIT command without a previous
                         * successful login:
                         *
                         * "530 QUIT : User not logged in. Please login with
                         * USER and PASS first."
                         * 
                         * Also want to accept the following ERROR
                         * message generated by some FTP servers following a
                         * QUIT command without a previously successful login:
                         *
                         * "425 Session is disconnected."
                         */
                    if (quitResponse.isSuccess() || (quitResponse.getCode() == 530) || (quitResponse.getCode() == 425)) {
                        serviceStatus = PollStatus.available(responseTime);
                    }
                }
            }
            /*
                 * If we get this far and the status has not been set
                 * to available, then something didn't verify during
                 * the banner checking or login/QUIT command process.
                 */
            if (!serviceStatus.isAvailable()) {
                serviceStatus = PollStatus.unavailable();
            }
        } catch (NumberFormatException e) {
            String reason = "NumberFormatException while polling address: " + ipAddr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (NoRouteToHostException e) {
            String reason = "No route to host 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 (ConnectException e) {
            String reason = "Connection exception for address: " + ipAddr;
            LOG.debug(reason, e);
            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) {
                LOG.debug("FtpMonitor.poll: Error closing socket", e);
            }
        }
    }
    return serviceStatus;
}