java - Gatling で 2 つのシナリオを実行しているときに Value is Null が表示されるのはなぜですか?

Question

スクリプトには2 つのシナリオがあります。最初の「getAssets」シナリオでは、すべてのアセット ID を取得してリストに保存します。2 番目のシナリオ「fetchMetadata」では、それらの ID を繰り返し処理します。

「getAssets」シナリオを 1 回だけ実行して、すべての ID を取得する必要があります。その後、「fetchMetadata」シナリオが所定の時間まで実行されます。

これは、「/api/assets;limit=$limit」リクエストの Json レスポンスです ($.assets[*].id を使用して、ここから ID を取得しています)。

{
  "assets": [
    {
      "id": 3010411,
      "name": "Asset 2016-11-22 20:06:07",
      ....
      ....
    },
    {
      "id": 3010231,
      "name": "Asset 2016-11-22 20:07:07",
      ....
      ....
    }, and so on..

ここにコードがあります

import java.util.concurrent.ThreadLocalRandom
import scala.concurrent.duration._
import io.gatling.core.Predef._
import io.gatling.http.Predef._

class getAssetsMetadata extends Simulation {
    val getAssetURL = System.getProperty("getAssetURL", "https://performancetesting.net")
    val username = System.getProperty("username", "performanceuser")
    val password = System.getProperty("password", "performanceuser")
    val limit = Integer.getInteger("limit", 1000).toInt
    val userCount = Integer.getInteger("userCount", 100).toInt
    val duration = Integer.getInteger("duration",1).toInt //in minutes

    var IdList: Seq[String] = _   

    val httpProtocol = http
        .basicAuth(username, password)
        .baseURL(getAssetURL)
        .contentTypeHeader("""application/vnd.v1+json""")

    // Scenario 1 get assets
    val getAssets = scenario("Get Assets")
            .exec(http("List of Assets")
            .get(s"""/api/assets;limit=$limit""")
            .check(jsonPath("$.assets[*].id").findAll.transform {v => IdList = v; v }.saveAs("IdList"))
            )

    // Scenario 2 Fetch Metadata
    val fetchMetadata = scenario("Fetch Metadata")
        .exec(_.set("IdList", IdList))
        .exec(http("Metadata Request")
            .get("""/api/assets/${IdList.random()}/metadata""")
            )

    val scn = List(getAssets.inject(atOnceUsers(1)), fetchMetadata.inject(constantUsersPerSec(userCount) during(duration minutes)))
    setUp(scn).protocols(httpProtocol) 
}

：：：エラー：：：

「Value is null」がスローされます (ここには 1,000 万のアセット ID があります)。ガトリングログはこちら

14883 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  io.gatling.http.config.HttpProtocol - Warm up done
14907 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  io.gatling.http.config.HttpProtocol - Start warm up
14909 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  io.gatling.http.config.HttpProtocol - Warm up done
14911 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  i.g.core.controller.Controller - Total number of users : 6001
14918 [GatlingSystem-akka.actor.default-dispatcher-6] INFO  i.g.c.r.writer.ConsoleDataWriter - Initializing
14918 [GatlingSystem-akka.actor.default-dispatcher-3] INFO  i.g.c.result.writer.FileDataWriter - Initializing
14923 [GatlingSystem-akka.actor.default-dispatcher-6] INFO  i.g.c.r.writer.ConsoleDataWriter - Initialized
14928 [GatlingSystem-akka.actor.default-dispatcher-3] INFO  i.g.c.result.writer.FileDataWriter - Initialized
14931 [GatlingSystem-akka.actor.default-dispatcher-4] DEBUG i.g.core.controller.Controller - Launching All Scenarios
14947 [GatlingSystem-akka.actor.default-dispatcher-12] ERROR i.g.http.action.HttpRequestAction - 'httpRequest-2' failed to execute: Value is null
14954 [GatlingSystem-akka.actor.default-dispatcher-4] DEBUG i.g.core.controller.Controller - Finished Launching scenarios executions
14961 [GatlingSystem-akka.actor.default-dispatcher-4] DEBUG i.g.core.controller.Controller - Setting up max duration
14962 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  i.g.core.controller.Controller - Start user #7187317726850756780-0
14963 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  i.g.core.controller.Controller - Start user #7187317726850756780-1
14967 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  i.g.core.controller.Controller - End user #7187317726850756780-1
14970 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  i.g.core.controller.Controller - Start user #7187317726850756780-2
14970 [GatlingSystem-akka.actor.default-dispatcher-5] INFO  io.gatling.http.ahc.HttpEngine - Sending request=List of Assets uri=https://performancetesting.net/api/assets;limit=1000: scenario=Get Assets, userId=7187317726850756780-0
14970 [GatlingSystem-akka.actor.default-dispatcher-7] ERROR i.g.http.action.HttpRequestAction - 'httpRequest-2' failed to execute: Value is null
14972 [GatlingSystem-akka.actor.default-dispatcher-7] INFO  i.g.core.controller.Controller - End user #7187317726850756780-2
14980 [GatlingSystem-akka.actor.default-dispatcher-7] ERROR i.g.http.action.HttpRequestAction - 'httpRequest-2' failed to execute: Value is null
14980 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  i.g.core.controller.Controller - Start user #7187317726850756780-3
14984 [GatlingSystem-akka.actor.default-dispatcher-4] INFO  i.g.core.controller.Controller - End user #7187317726850756780-3
.....
.....
.....
61211 [GatlingSystem-akka.actor.default-dispatcher-12] INFO  i.g.core.controller.Controller - Start user #7187317726850756780-4626
61211 [GatlingSystem-akka.actor.default-dispatcher-7] ERROR i.g.http.action.HttpRequestAction - 'httpRequest-2' failed to execute: Value is null
61211 [GatlingSystem-akka.actor.default-dispatcher-7] INFO  i.g.core.controller.Controller - End user #7187317726850756780-4626
61224 [GatlingSystem-akka.actor.default-dispatcher-2] INFO  i.g.core.controller.Controller - Start user #7187317726850756780-4627
61225 [GatlingSystem-akka.actor.default-dispatcher-5] INFO  io.gatling.http.ahc.HttpEngine - Sending request=Metadata Request uri=https://performancetesting.net/api/assets/3010320/metadata: scenario=Fetch Metadata, userId=7187317726850756780-4627
61230 [GatlingSystem-akka.actor.default-dispatcher-12] INFO  i.g.core.controller.Controller - Start user #7187317726850756780-4628
61230 [GatlingSystem-akka.actor.default-dispatcher-7] INFO  io.gatling.http.ahc.HttpEngine - Sending request=Metadata Request uri=https://performancetesting.net/api/assets/3009939/metadata: scenario=Fetch Metadata, userId=7187317726850756780-4628
61233 [GatlingSystem-akka.actor.default-dispatcher-2] INFO  i.g.core.controller.Controller - End user #7187317726850756780-0
61233 [New I/O worker #12] DEBUG c.n.h.c.p.netty.handler.Processor - Channel Closed: [id: 0x8c94a1ae, /192.168.100.108:56739 :> performancetesting.net/10.20.14.176:443] with attribute INSTANCE

---- Requests ------------------------------------------------------------------
> Global                                                   (OK=261    KO=40    )
> Metadata Request                                         (OK=260    KO=40    )
> List of Assets                                           (OK=1      KO=0     )
---- Errors --------------------------------------------------------------------
> Value is null                                                      40 (100.0%)
================================================================================

ありがとうございました。

java - Gatling で 2 つのシナリオを実行しているときに Value is Null が表示されるのはなぜですか?

1 に答える 1

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