java - 如果 Controller 在jMeter线程组中

Question

我正在使用 jp@gc 的终极线程组，并且在线程组内部我有一个 if Controller ，确保只有每个其他线程/用户继续

(${__threadNum}%2==0) 

关闭线程似乎存在一些问题，因为在负载保持设定的时间后，我收到的错误数量与进入 Controller 的线程数量一样多。我不确定它们是关于什么的，而且它们似乎与 if Controller 的内容无关，因为即使在停用内部所有内容后我仍然得到它们。

我在 Windows 10 上使用 jMeter 3.2 和 Ultimate Thread Group 2.1。

错误信息:

java.lang.StackOverflowError: null
at java.lang.invoke.MethodHandles.insertArguments(Unknown Source) ~[?:1.8.0_131]
at jdk.internal.dynalink.DynamicLinker.createRelinkAndInvokeMethod(DynamicLinker.java:224) ~[nashorn.jar:?]
at jdk.internal.dynalink.DynamicLinker.link(DynamicLinker.java:201) ~[nashorn.jar:?]
at jdk.nashorn.internal.runtime.linker.Bootstrap.bootstrap(Bootstrap.java:208) ~[nashorn.jar:?]
at jdk.nashorn.internal.runtime.linker.Bootstrap.createDynamicInvoker(Bootstrap.java:371) ~[nashorn.jar:?]
at jdk.nashorn.internal.runtime.linker.Bootstrap.createDynamicInvoker(Bootstrap.java:345) ~[nashorn.jar:?]
at jdk.nashorn.internal.runtime.linker.InvokeByName.<init>(InvokeByName.java:86) ~[nashorn.jar:?]
at jdk.nashorn.internal.runtime.linker.InvokeByName.<init>(InvokeByName.java:73) ~[nashorn.jar:?]
at jdk.nashorn.internal.objects.Global.<init>(Global.java:96) ~[nashorn.jar:?]
at jdk.nashorn.internal.runtime.Context.newGlobal(Context.java:1111) ~[nashorn.jar:?]
at jdk.nashorn.api.scripting.NashornScriptEngine$2.run(NashornScriptEngine.java:350) ~[nashorn.jar:?]
at jdk.nashorn.api.scripting.NashornScriptEngine$2.run(NashornScriptEngine.java:346) ~[nashorn.jar:?]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_131]
at jdk.nashorn.api.scripting.NashornScriptEngine.createNashornGlobal(NashornScriptEngine.java:346) ~[nashorn.jar:?]
at jdk.nashorn.api.scripting.NashornScriptEngine.createGlobalMirror(NashornScriptEngine.java:340) ~[nashorn.jar:?]
at jdk.nashorn.api.scripting.NashornScriptEngine.createBindings(NashornScriptEngine.java:170) ~[nashorn.jar:?]
at org.apache.jmeter.control.IfController$NashornJsEngine.evaluate(IfController.java:123) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.IfController.evaluateCondition(IfController.java:185) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.IfController.next(IfController.java:239) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.GenericController.nextIsAController(GenericController.java:219) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.GenericController.next(GenericController.java:173) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.LoopController.next(LoopController.java:123) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.LoopController.nextIsNull(LoopController.java:151) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.GenericController.next(GenericController.java:168) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.LoopController.next(LoopController.java:123) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.GenericController.nextIsAController(GenericController.java:222) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.GenericController.next(GenericController.java:173) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.LoopController.next(LoopController.java:123) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.LoopController.nextIsNull(LoopController.java:151) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.GenericController.next(GenericController.java:168) ~[ApacheJMeter_core.jar:3.2 r1790748]
at org.apache.jmeter.control.LoopController.next(LoopController.java:123) ~[ApacheJMeter_core.jar:3.2 r1790748]
at... etc etc

编辑:现在我放弃这个，只使用普通线程组，因为它不会给出任何错误。

Answer 1

自 JMeter 3.1 it is recommended to use JSR223 Test Elements and __groovy function对于 JMeter 中任何形式的脚本编写，我建议从 JavaScript 切换到 Groovy 并使用 __groovy() function在 If Controller 的“条件”区域中，例如:

${__groovy(ctx.getThreadNum() %2 == 0,)}

参见Apache Groovy - Why and How You Should Use It文章了解有关 JMeter 测试、基准测试、最佳实践等上下文中的 Groovy 脚本编写的更多信息。