Example usage for io.netty.util NetUtil SOMAXCONN

Introduction

In this page you can find the example usage for io.netty.util NetUtil SOMAXCONN.

Prototype

int SOMAXCONN

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Document

The SOMAXCONN value of the current machine.

Usage

From source file:org.apache.hadoop.hive.llap.daemon.services.impl.SystemConfigurationServlet.java

License:Apache License

@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    JsonGenerator jg = null;//  w w w  . ja va 2 s  . co m
    PrintWriter writer = null;
    if (!HttpServer.isInstrumentationAccessAllowed(getServletContext(), request, response)) {
        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        return;
    }
    setResponseHeader(response);
    boolean refresh = Boolean.parseBoolean(request.getParameter("refresh"));
    try {
        writer = response.getWriter();
        jg = jsonFactory.createJsonGenerator(writer);
        jg.disable(JsonGenerator.Feature.AUTO_CLOSE_TARGET);
        jg.useDefaultPrettyPrinter();
        jg.writeStartObject();

        jg.writeObjectField("pid", LlapDaemonInfo.INSTANCE.getPID());
        jg.writeObjectField("os.name", System.getProperty("os.name"));
        if (Shell.WINDOWS) {
            jg.writeObjectField("net.core.somaxconn", NetUtil.SOMAXCONN);
        } else {
            String sysctlCmd = "sysctl -a";
            try {
                if (sysctlOutRef.get() == null || refresh) {
                    LOG.info("Reading kernel configs via sysctl..");
                    String sysctlOutput = Shell.execCommand(sysctlCmd.split("\\s+"));
                    sysctlOutRef.set(sysctlOutput);
                }
            } catch (IOException e) {
                LOG.warn("Unable to execute '{}' command", sysctlCmd, e);
                sysctlOutRef.set(FAILED); // failures will not be retried (to avoid fork + exec running sysctl command)
                jg.writeObjectField("sysctl", FAILED);
                jg.writeObjectField("sysctl-failure-reason", e.getMessage());
            }

            if (sysctlOutRef.get() != null && !sysctlOutRef.get().equals(FAILED)) {
                String[] lines = sysctlOutRef.get().split("\\r?\\n");
                for (String line : lines) {
                    int sepIdx = line.indexOf(SYSCTL_KV_SEPARATOR);
                    String key = sepIdx == -1 ? line.trim() : line.substring(0, sepIdx).trim();
                    String value = sepIdx == -1 ? null
                            : line.substring(sepIdx + 1).trim().replaceAll("\t", "  ");
                    if (!key.isEmpty()) {
                        jg.writeObjectField(key, value);
                    }
                }
            }

            if (!Shell.MAC) {
                // Red Hat/CentOS: /sys/kernel/mm/redhat_transparent_hugepage/defrag
                // Ubuntu/Debian, OEL, SLES: /sys/kernel/mm/transparent_hugepage/defrag
                String thpFileName = "/sys/kernel/mm/transparent_hugepage/enabled";
                String thpFileStr = PrivilegedFileReader.read(thpFileName);
                if (thpFileStr == null) {
                    LOG.warn("Unable to read contents of {}", thpFileName);
                    thpFileName = "/sys/kernel/mm/redhat_transparent_hugepage/enabled";
                    thpFileStr = PrivilegedFileReader.read(thpFileName);
                }

                if (thpFileStr != null) {
                    // Format: "always madvise [never]"
                    int strIdx = thpFileStr.indexOf('[');
                    int endIdx = thpFileStr.indexOf(']');
                    jg.writeObjectField(thpFileName, thpFileStr.substring(strIdx + 1, endIdx));
                } else {
                    LOG.warn("Unable to read contents of {}", thpFileName);
                }

                String thpDefragFileName = "/sys/kernel/mm/transparent_hugepage/enabled";
                String thpDefragFileStr = PrivilegedFileReader.read(thpDefragFileName);
                if (thpDefragFileStr == null) {
                    LOG.warn("Unable to read contents of {}", thpDefragFileName);
                    thpDefragFileName = "/sys/kernel/mm/redhat_transparent_hugepage/enabled";
                    thpDefragFileStr = PrivilegedFileReader.read(thpDefragFileName);
                }

                if (thpDefragFileStr != null) {
                    // Format: "always madvise [never]"
                    int strIdx = thpDefragFileStr.indexOf('[');
                    int endIdx = thpDefragFileStr.indexOf(']');
                    jg.writeObjectField(thpDefragFileName, thpDefragFileStr.substring(strIdx + 1, endIdx));
                } else {
                    LOG.warn("Unable to read contents of {}", thpDefragFileName);
                }
            }
        }

        jg.writeEndObject();
        response.setStatus(HttpServletResponse.SC_OK);
    } catch (Exception e) {
        LOG.error("Caught exception while processing llap /system web service request", e);
        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    } finally {
        if (jg != null) {
            jg.close();
        }
        if (writer != null) {
            writer.close();
        }
    }
}

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From source file:org.apache.hadoop.hive.llap.shufflehandler.ShuffleHandler.java

License:Apache License

public void start() throws Exception {
    ServerBootstrap bootstrap = new ServerBootstrap(selector);
    // Timer is shared across entire factory and must be released separately
    timer = new HashedWheelTimer();
    try {/*  w  ww. j a  v  a  2  s.  c o  m*/
        pipelineFact = new HttpPipelineFactory(conf, timer);
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
    bootstrap.setPipelineFactory(pipelineFact);
    bootstrap.setOption("backlog", NetUtil.SOMAXCONN);
    port = conf.getInt(SHUFFLE_PORT_CONFIG_KEY, DEFAULT_SHUFFLE_PORT);
    Channel ch = bootstrap.bind(new InetSocketAddress(port));
    accepted.add(ch);
    port = ((InetSocketAddress) ch.getLocalAddress()).getPort();
    conf.set(SHUFFLE_PORT_CONFIG_KEY, Integer.toString(port));
    pipelineFact.SHUFFLE.setPort(port);
    if (dirWatcher != null) {
        dirWatcher.start();
    }
    LOG.info("LlapShuffleHandler" + " listening on port " + port + " (SOMAXCONN: "
            + bootstrap.getOption("backlog") + ")");
}

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