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

Example 46 with ConnectException

use of java.net.ConnectException in project pinot by linkedin.

the class NettyTCPClientConnection method connect.

/**
   * Open a connection
   */
@Override
public boolean connect() {
    try {
        checkTransition(State.CONNECTED);
        //Connect synchronously. At the end of this line, _channel should have been set
        TimerContext t = MetricsHelper.startTimer();
        ChannelFuture f = _bootstrap.connect(_server.getHostname(), _server.getPort()).sync();
        /**
       * Waiting for future alone does not guarantee that _channel is set. _channel is set
       * only when the channelActive() async callback runs. So we should also wait for it.
       */
        f.get();
        _channelSet.await();
        t.stop();
        _connState = State.CONNECTED;
        _clientMetric.addConnectStats(t.getLatencyMs());
        return true;
    } catch (Exception ie) {
        if (ie instanceof ConnectException && ie.getMessage() != null && ie.getMessage().startsWith("Connection refused")) {
            // Most common case when a server is down. Don't print the entire stack and fill the logs.
            LOGGER.error("Could not connect to server {}:{} connId:{}", _server, ie.getMessage(), getConnId());
        } else {
            LOGGER.error("Got exception when connecting to server {} connId {}", _server, ie, getConnId());
        }
    }
    return false;
}

Example 47 with ConnectException

use of java.net.ConnectException in project rest.li by linkedin.

the class LoadBalancerUtilTest method testFindOriginalThrowable.

@Test
public void testFindOriginalThrowable() {
    ConnectException connectException = new ConnectException("Foo");
    RemoteInvocationException e = new RemoteInvocationException("Failed to get connect to a server", connectException);
    Throwable throwable = LoadBalancerUtil.findOriginalThrowable(e);
    Assert.assertEquals(throwable, connectException);
    //we only go as far as 100 level deep for finding exception
    Exception npe = new NullPointerException();
    Exception temp = npe;
    for (int i = 0; i < 100; i++) {
        e = new RemoteInvocationException(temp);
        temp = e;
    }
    throwable = LoadBalancerUtil.findOriginalThrowable(e);
    Assert.assertEquals(throwable, npe);
    //we add the 101th exception then we lost the reference to NullPointerException
    e = new RemoteInvocationException(temp);
    throwable = LoadBalancerUtil.findOriginalThrowable(e);
    Assert.assertFalse(throwable instanceof NullPointerException);
}

Example 48 with ConnectException

use of java.net.ConnectException in project jmxtrans by jmxtrans.

the class OpenTSDBWriter method internalWrite.

@Override
public void internalWrite(Server server, Query query, ImmutableList<Result> results) throws Exception {
    Socket socket = null;
    PrintWriter writer = null;
    try {
        socket = pool.borrowObject(address);
        writer = new PrintWriter(new OutputStreamWriter(socket.getOutputStream(), UTF_8), true);
        for (String formattedResult : messageFormatter.formatResults(results, server)) {
            log.debug("OpenTSDB Message: {}", formattedResult);
            writer.write("put " + formattedResult + "\n");
        }
    } catch (ConnectException e) {
        log.error("Error while connecting to OpenTSDB", e);
    } finally {
        if (writer != null && writer.checkError()) {
            log.error("Error writing to OpenTSDB, clearing OpenTSDB socket pool");
            pool.invalidateObject(address, socket);
        } else {
            pool.returnObject(address, socket);
        }
    }
}

Example 49 with ConnectException

use of java.net.ConnectException in project hudson-2.x by hudson.

the class ProxyConfiguration method open.

/**
     * This method should be used wherever {@link URL#openConnection()} to internet URLs is invoked directly.
     */
public static URLConnection open(URL url) throws IOException {
    // this code might run on slaves
    Hudson hudson = Hudson.getInstance();
    ProxyConfiguration proxyConfig = hudson != null ? hudson.proxy : null;
    if (proxyConfig == null) {
        return url.openConnection();
    }
    if (proxyConfig.noProxyFor != null) {
        StringTokenizer tokenizer = new StringTokenizer(proxyConfig.noProxyFor, ",");
        while (tokenizer.hasMoreTokens()) {
            String noProxyHost = tokenizer.nextToken().trim();
            if (noProxyHost.contains("*")) {
                if (url.getHost().trim().contains(noProxyHost.replaceAll("\\*", ""))) {
                    return url.openConnection(Proxy.NO_PROXY);
                }
            } else if (url.getHost().trim().equals(noProxyHost)) {
                return url.openConnection(Proxy.NO_PROXY);
            }
        }
    }
    URLConnection urlConnection = url.openConnection(proxyConfig.createProxy());
    if (proxyConfig.isAuthNeeded()) {
        String credentials = proxyConfig.getUserName() + ":" + proxyConfig.getPassword();
        String encoded = new String(Base64.encodeBase64(credentials.getBytes()));
        urlConnection.setRequestProperty("Proxy-Authorization", "Basic " + encoded);
    }
    boolean connected = false;
    int count = 0;
    while (!connected) {
        try {
            urlConnection.connect();
            connected = true;
        } catch (SocketTimeoutException exc) {
            LOGGER.fine("Connection timed out. trying again " + count);
            if (++count > TIME_OUT_RETRY_COUNT) {
                throw new IOException("Could not connect to " + url.toExternalForm() + ". Connection timed out after " + TIME_OUT_RETRY_COUNT + " tries.");
            }
            connected = false;
        } catch (UnknownHostException exc) {
            throw new IOException2("Could not connect to " + url.toExternalForm() + ". Check your internet connection.", exc);
        } catch (ConnectException exc) {
            throw new IOException2("Could not connect to " + url.toExternalForm() + ". Check your internet connection.", exc);
        }
    }
    return urlConnection;
}

Example 50 with ConnectException

use of java.net.ConnectException in project jsoup by jhy.

the class UrlConnectTest method invalidProxyFails.

@Test
public void invalidProxyFails() throws IOException {
    boolean caught = false;
    String url = "https://jsoup.org";
    try {
        Document doc = Jsoup.connect(url).proxy("localhost", 8889).get();
    } catch (IOException e) {
        caught = e instanceof ConnectException;
    }
    assertTrue(caught);
}