无法运行 Gatling 模拟 - 错误 NoSuchElementException [gatling.scala:83]

编程问答 2022-08-07

问题描述

我最近使用 maven 运行了我的加特林模拟场景 tutorial，
一周前它运行正常，直到最近我再次尝试重新运行该场景然后出现错误
[main][ERROR][gatling.scala:83] i.g.a.gatling$ - Run crashed java.util.NoSuchElementException: null。

我用这个命令运行场景
mvn gatling:test -Dgatling.simulationClass=myscenario

我认为这是由某些损坏的存储库引起的？因为我看到它指向加特林依赖。
我尝试重新安装依赖项：

  • mvn dependency:purge-local-repository - 没有解决问题
  • mvn clean install -U - 没有解决问题
  • rm -rf ~/.m2/repository - 没有解决问题

这里是日志：

[INFO] Scanning for projects...
[INFO] 
[INFO] ----------< collection:collection >-----------
[INFO] Building collection 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- gatling-maven-plugin:3.1.0:test (default-cli) @ collection ---
16:34:00.585 [main][ERROR][gatling.scala:83] i.g.a.gatling$ - Run crashed
java.util.NoSuchElementException: null
        at scala.collection.immutable.BitmapIndexedMapNode.apply(HashMap.scala:635)
        at scala.collection.immutable.HashMap.apply(HashMap.scala:132)
        at simulations.PoolCollection.<init>(PoolCollection.scala:21)
        ... 16 common frames omitted
Wrapped by: java.lang.reflect.InvocationTargetException: null
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at io.gatling.app.Runner.run0(Runner.scala:65)
        at io.gatling.app.Runner.run(Runner.scala:52)
        at io.gatling.app.gatling$.start(gatling.scala:80)
        at io.gatling.app.gatling$.fromArgs(gatling.scala:45)
        at io.gatling.app.gatling$.main(gatling.scala:37)
        at io.gatling.app.gatling.main(gatling.scala)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at io.gatling.mojo.MainWithArgsInFile.runMain(MainWithArgsInFile.java:50)
        at io.gatling.mojo.MainWithArgsInFile.main(MainWithArgsInFile.java:33)
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at io.gatling.mojo.MainWithArgsInFile.runMain(MainWithArgsInFile.java:50)
        at io.gatling.mojo.MainWithArgsInFile.main(MainWithArgsInFile.java:33)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at io.gatling.app.Runner.run0(Runner.scala:65)
        at io.gatling.app.Runner.run(Runner.scala:52)
        at io.gatling.app.gatling$.start(gatling.scala:80)
        at io.gatling.app.gatling$.fromArgs(gatling.scala:45)
        at io.gatling.app.gatling$.main(gatling.scala:37)
        at io.gatling.app.gatling.main(gatling.scala)
        ... 6 more
Caused by: java.util.NoSuchElementException
        at scala.collection.immutable.BitmapIndexedMapNode.apply(HashMap.scala:635)
        at scala.collection.immutable.HashMap.apply(HashMap.scala:132)
        at simulations.PoolCollection.<init>(PoolCollection.scala:21)
        ... 16 more
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  4.377 s
[INFO] Finished at: 2021-01-28T16:34:00+07:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal io.gatling:gatling-maven-plugin:3.1.0:test (default-cli) on project collection: gatling Failed.: Process exited with an error: 255 (Exit value: 255) -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors,re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more @R_745_4045@ion about the errors and possible solutions,please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

解决方法

堆栈跟踪非常清楚：这是您这边的编码问题，Gatling 没有错。

Caused by: java.util.NoSuchElementException
        at scala.collection.immutable.BitmapIndexedMapNode.apply(HashMap.scala:635)
        at scala.collection.immutable.HashMap.apply(HashMap.scala:132)
        at simulations.PoolCollection.<init>(PoolCollection.scala:21)

看看你在第 21 行的 PoolCollection 类中做了什么。你试图从 HashMap 中获取一个不存在的条目。

gatlingmavenscala