java.net.ConnectException：使用千分尺的AtlasMeterRegistry

Question

我是micrometer和netflix/atlas的新手。

我正在尝试创建一个非常基本的千分尺示例，并将Counter注册到AtlasMeterRegistry。但是我得到java.net.ConnectException。深入研究代码后，我发现atlas后端的默认URI是http://localhost:7101/api/v1/publish。我什至可以在日志中看到

09:13:44.578 [main] INFO  c.n.spectator.atlas.AtlasRegistry - started collecting metrics every PT10S reporting to http://localhost:7101/api/v1/publish

表示默认的URI用于atlas后端。

我不确定我缺少什么。我想我缺少明显的东西。

我正在使用JDK11。以下是我遇到的异常的堆栈跟踪：

09:13:49.215 [spectator-spectator-reg-atlas-0] WARN  c.n.spectator.atlas.AtlasRegistry - failed to send metrics
java.net.ConnectException: Connection refused (Connection refused)
    at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
    at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
    at java.base/java.net.Socket.connect(Socket.java:591)
    at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:177)
    at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:474)
    at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:569)
    at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
    at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:341)
    at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:362)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1242)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1181)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1075)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1009)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1356)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1331)
    at com.netflix.spectator.ipc.http.HttpRequestBuilder.sendImpl(HttpRequestBuilder.java:288)
    at com.netflix.spectator.ipc.http.HttpRequestBuilder.send(HttpRequestBuilder.java:218)
    at com.netflix.spectator.atlas.AtlasRegistry.collectData(AtlasRegistry.java:207)
    at com.netflix.spectator.impl.Scheduler$DelayedTask.runAndReschedule(Scheduler.java:401)
    at com.netflix.spectator.impl.Scheduler$Worker.lambda$run$0(Scheduler.java:475)
    at com.netflix.spectator.api.SwapTimer.record(SwapTimer.java:52)
    at com.netflix.spectator.impl.Scheduler$Worker.run(Scheduler.java:475)
    at java.base/java.lang.Thread.run(Thread.java:834)

我的pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>micrometer_test</groupId>
    <artifactId>micrometer_test</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <downloadSources>true</downloadSources>
        <downloadJavadocs>true</downloadJavadocs>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>

        <slf4j.version>1.7.25</slf4j.version>
        <logback.version>1.2.3</logback.version>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/io.micrometer/micrometer-core -->
        <dependency>
            <groupId>io.micrometer</groupId>
            <artifactId>micrometer-core</artifactId>
            <version>1.1.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/io.micrometer/micrometer-registry-jmx -->
        <dependency>
            <groupId>io.micrometer</groupId>
            <artifactId>micrometer-registry-jmx</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>


        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>${logback.version}</version>
        </dependency>

        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>${logback.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/io.micrometer/micrometer-registry-atlas -->
        <dependency>
            <groupId>io.micrometer</groupId>
            <artifactId>micrometer-registry-atlas</artifactId>
            <version>1.1.1</version>
        </dependency>

    </dependencies>

</project>

我的Main班：

import io.micrometer.atlas.AtlasMeterRegistry;
import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.composite.CompositeMeterRegistry;
import io.micrometer.core.instrument.logging.LoggingMeterRegistry;
import io.micrometer.jmx.JmxMeterRegistry;

import java.util.Random;

public class Main {

    public static void main(String[] args) throws InterruptedException {
        CompositeMeterRegistry compositeMeterRegistry = new CompositeMeterRegistry();

        LoggingMeterRegistry loggingMeterRegistry = SampleMeterRegistries.loggingMeterRegistry();
        JmxMeterRegistry jmxMeterRegistry = SampleMeterRegistries.jmxMeterRegistry();
        AtlasMeterRegistry atlasMeterRegistry = SampleMeterRegistries.atlasMeterRegistry();

        compositeMeterRegistry.add(loggingMeterRegistry);
        compositeMeterRegistry.add(jmxMeterRegistry);
        compositeMeterRegistry.add(atlasMeterRegistry);


        Counter counter = Counter
                .builder("instance")
                .description("some description")
                .tags("dev", "performance")
                .register(compositeMeterRegistry);


        Random random = new Random();
        while (true) {
            Thread.sleep(random.nextInt(100));
            counter.increment();
        }


    }
}

SampleMeterRegistries我正在使用：

import com.netflix.spectator.atlas.AtlasConfig;
import io.micrometer.atlas.AtlasMeterRegistry;
import io.micrometer.core.instrument.Clock;
import io.micrometer.core.instrument.logging.LoggingMeterRegistry;
import io.micrometer.core.instrument.logging.LoggingRegistryConfig;
import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
import io.micrometer.core.lang.Nullable;
import io.micrometer.jmx.JmxConfig;
import io.micrometer.jmx.JmxMeterRegistry;

import java.time.Duration;

public class SampleMeterRegistries {

    private static final long DEFAULT_STEP_SIZE = 10; // in seconds

    private SampleMeterRegistries() {

    }

    public static LoggingMeterRegistry loggingMeterRegistry() {
        return new LoggingMeterRegistry(new LoggingRegistryConfig() {
            @Override
            public String get(String key) {
                return null;
            }

            @Override
            public Duration step() {
                return Duration.ofSeconds(DEFAULT_STEP_SIZE);
            }
        }, Clock.SYSTEM);
    }

    public static JmxMeterRegistry jmxMeterRegistry() {
        return new JmxMeterRegistry(new JmxConfig() {
            @Override
            public String get(String key) {
                return null;
            }

            @Override
            public Duration step() {
                return Duration.ofSeconds(DEFAULT_STEP_SIZE);
            }
        }, Clock.SYSTEM);
    }

    public static AtlasMeterRegistry atlasMeterRegistry() {
        return new AtlasMeterRegistry(new AtlasConfig() {
            @Override
            public Duration step() {
                return Duration.ofSeconds(DEFAULT_STEP_SIZE);
            }

            @SuppressWarnings("ConstantConditions")
            @Override
            @Nullable
            public String get(String k) {
                return null;
            }
        }, Clock.SYSTEM);
    }

    public static SimpleMeterRegistry simpleMeterRegistry() {
        return new SimpleMeterRegistry();
    }

}

有人可以指出我在这里不见的明显事情吗？任何初学者指南的指针也将有所帮助。谢谢。

更新：我在JDK 1.8.0_191上进行了尝试，但仍然遇到相同的异常。