Gatling不使用SpringBoot 2.0.1.Gatling

Question

我正在尝试用Spring 2.0.1安装Gatling。

我创建了这个api：

@RestController
@RequestMapping("/contact")
public class ContactController {

    @GetMapping
    public ResponseEntity get() {
        return ResponseEntity.ok("Contact retrieved successfully");
    }
}

这个基本的模拟：

import io.gatling.core.Predef._
import io.gatling.http.Predef._

class ContactSimulation extends Simulation {

  val httpConf = http.baseURL("http://localhost:8080")

  val scn = scenario("GetContact")
    .exec(
      http("GetContact")
        .get("/contact")
        .check(status.is(200))
    )

  setUp(scn.inject(atOnceUsers(1))).protocols(httpConf)
}

build.gradle是这样配置的：

buildscript {
    ext {
        springBootVersion = '2.0.1.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'java'
apply plugin: 'scala'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

group = 'com.gatling.poc'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8

repositories {
    mavenCentral()
}


dependencies {
    compile('org.springframework.boot:spring-boot-starter-web')
    testCompile('org.springframework.boot:spring-boot-starter-test')
    testCompile('io.gatling.highcharts:gatling-charts-highcharts:2.3.0')
}

task loadTest(type: JavaExec) {
    dependsOn testClasses
    description = "Load Test With Gatling"
    group = "Load Test"
    classpath = sourceSets.test.runtimeClasspath
    jvmArgs = [
            "-Dgatling.core.directory.binaries=${sourceSets.test.output.classesDir.toString()}"
    ]
    main = "io.gatling.app.Gatling"
    args = [
            "--simulation", "com.gatling.poc.simulations.ContactSimulation",
            "--results-folder", "${buildDir}/gatling-results",
            "--binaries-folder", sourceSets.test.output.classesDir.toString(),
            "--bodies-folder", sourceSets.test.resources.srcDirs.toList().first().toString() + "/gatling/bodies",
    ]
}

在执行测试时：

./gradlew loadTest

我得到了以下堆栈跟踪：

21:00:12.804 [main] WARN io.netty.util.concurrent.DefaultPromise - An exception was thrown by org.asynchttpclient.netty.request.NettyRequestSender$1.operationComplete()
java.lang.NoSuchMethodError: io.netty.channel.DefaultChannelId.newInstance()Lio/netty/channel/DefaultChannelId;
        at io.netty.channel.AbstractChannel.newId(AbstractChannel.java:111)
        at io.netty.channel.AbstractChannel.<init>(AbstractChannel.java:83)
        at io.netty.bootstrap.FailedChannel.<init>(FailedChannel.java:33)
        at io.netty.bootstrap.AbstractBootstrap.initAndRegister(AbstractBootstrap.java:330)
        at io.netty.bootstrap.Bootstrap.doResolveAndConnect(Bootstrap.java:163)
        at io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:156)
        at org.asynchttpclient.netty.request.NettyChannelConnector.connect0(NettyChannelConnector.java:81)
        at org.asynchttpclient.netty.request.NettyChannelConnector.connect(NettyChannelConnector.java:69)
        at org.asynchttpclient.netty.request.NettyRequestSender$1.onSuccess(NettyRequestSender.java:292)
        at org.asynchttpclient.netty.request.NettyRequestSender$1.onSuccess(NettyRequestSender.java:285)
        at org.asynchttpclient.netty.SimpleFutureListener.operationComplete(SimpleFutureListener.java:24)
        at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:511)
        at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:485)
        at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:424)
        at io.netty.util.concurrent.DefaultPromise.addListener(DefaultPromise.java:162)
        at io.netty.util.concurrent.DefaultPromise.addListener(DefaultPromise.java:33)
        at org.asynchttpclient.netty.request.NettyRequestSender.sendRequestWithNewChannel(NettyRequestSender.java:285)
        at org.asynchttpclient.netty.request.NettyRequestSender.sendRequestWithCertainForceConnect(NettyRequestSender.java:136)
        at org.asynchttpclient.netty.request.NettyRequestSender.sendRequest(NettyRequestSender.java:107)
        at org.asynchttpclient.DefaultAsyncHttpClient.execute(DefaultAsyncHttpClient.java:216)
        at org.asynchttpclient.DefaultAsyncHttpClient.executeRequest(DefaultAsyncHttpClient.java:184)
        at org.asynchttpclient.DefaultAsyncHttpClient.executeRequest(DefaultAsyncHttpClient.java:206)
        at io.gatling.http.ahc.HttpEngine.warmpUp(HttpEngine.scala:96)
        at io.gatling.http.protocol.HttpProtocol$$anon$1.$anonfun$newComponents$1(HttpProtocol.scala:62)
        at io.gatling.core.protocol.ProtocolComponentsRegistry.comps$1(Protocol.scala:67)
        at io.gatling.core.protocol.ProtocolComponentsRegistry.$anonfun$components$4(Protocol.scala:69)
        at scala.collection.mutable.HashMap.getOrElseUpdate(HashMap.scala:82)
        at io.gatling.core.protocol.ProtocolComponentsRegistry.components(Protocol.scala:69)
        at io.gatling.http.action.HttpActionBuilder.lookUpHttpComponents(HttpActionBuilder.scala:25)
        at io.gatling.http.action.sync.HttpRequestActionBuilder.build(HttpRequestActionBuilder.scala:33)
        at io.gatling.core.structure.StructureBuilder.$anonfun$build$1(StructureBuilder.scala:34)
        at scala.collection.LinearSeqOptimized.foldLeft(LinearSeqOptimized.scala:122)
        at scala.collection.LinearSeqOptimized.foldLeft$(LinearSeqOptimized.scala:118)
        at scala.collection.immutable.List.foldLeft(List.scala:86)
        at io.gatling.core.structure.StructureBuilder.build(StructureBuilder.scala:33)
        at io.gatling.core.structure.StructureBuilder.build$(StructureBuilder.scala:32)
        at io.gatling.core.structure.ScenarioBuilder.build(ScenarioBuilder.scala:38)
        at io.gatling.core.structure.PopulationBuilder.build(ScenarioBuilder.scala:98)
        at io.gatling.core.scenario.SimulationParams.$anonfun$scenarios$1(Simulation.scala:188)
        at scala.collection.immutable.List.map(List.scala:283)
        at io.gatling.core.scenario.SimulationParams.scenarios(Simulation.scala:188)
        at io.gatling.app.Runner.run0(Runner.scala:95)
        at io.gatling.app.Runner.run(Runner.scala:64)
        at io.gatling.app.Gatling$.start(Gatling.scala:59)
        at io.gatling.app.Gatling$.fromArgs(Gatling.scala:43)
        at io.gatling.app.Gatling$.main(Gatling.scala:35)
        at io.gatling.app.Gatling.main(Gatling.scala)

如果我使用SpringBoot 1.5.12创建相同的项目，那么project 就能很好地工作。我怀疑spring-boot-gradle-plugin，因为它会根据SpringBoot版本而改变。

如果有必要，我可以在github中创建一个项目来演示这个问题。=)

如果有人能帮我，我会很感激的！

Answer 1

我已经解决了这个问题。

问题是由io.netty组使用的SpringBoot 2.0.1.RELEASE版本。它使用的是版本4.1.23.Final，由于某些原因(可能是scala中的一些更改)，它没有执行gatling测试。

我进行降级是为了使用与SpringBoot 1.5.12相同的版本，version 是4.0.51.Final。我必须将这个配置添加到build.gradle中

{
// This build.gradle is the same that I posted above. For the sake of simplicity I just put the configuration that has been necessary to solve the problem.

// After dependencies{} section, I had to put this:

configurations.all {
    resolutionStrategy {
        eachDependency { DependencyResolveDetails details ->
            if (details.requested.group == 'io.netty') {
                details.useVersion "4.0.51.Final"
            }
        }
    }
}
}

我认为这不是最好的解决方案，因为我正在将io.netty版本还原为使用旧版本，这可能会产生一些副作用。在我的例子中，我没有选择降低SpringBoot版本的级别。如果您可以选择恢复SpringBoot版本，我建议您这样做。