JMeter - ElasticSearch 后端侦听器插件不起作用

Question

我有 JMeter 3.3，我添加了 ElasticSearch backend listener 插件。

我打开 JMeter GUI 并尝试创建后端侦听器，但失败并出现错误：

2017-10-17 14:35:24,785 ERROR o.a.j.g.GuiPackage: Problem retrieving gui for org.apache.jmeter.visualizers.backend.BackendListenerGui
java.lang.NoClassDefFoundError: okhttp3/MediaType
    at net.kvak.jmeter.backendlistener.elasticsearch.ElasticsearchBackend.<clinit>(ElasticsearchBackend.java:50) ~[elasticsearch-backend-listener-1.5.jar:?]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_144]
    at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_144]
    at org.apache.jmeter.visualizers.backend.BackendListenerGui.actionPerformed(BackendListenerGui.java:166) ~[ApacheJMeter_components.jar:3.3 r1808647]
    at javax.swing.JComboBox.fireActionEvent(Unknown Source) ~[?:1.8.0_144]
    at javax.swing.JComboBox.setSelectedItem(Unknown Source) ~[?:1.8.0_144]
    at javax.swing.JComboBox.setSelectedIndex(Unknown Source) ~[?:1.8.0_144]
    at org.apache.jmeter.visualizers.backend.BackendListenerGui.clearGui(BackendListenerGui.java:281) ~[ApacheJMeter_components.jar:3.3 r1808647]
    at org.apache.jmeter.gui.GuiPackage.createTestElement(GuiPackage.java:348) ~[ApacheJMeter_core.jar:3.3 r1808647]
    at org.apache.jmeter.gui.action.AddToTree.doAction(AddToTree.java:68) ~[ApacheJMeter_core.jar:3.3 r1808647]
    at org.apache.jmeter.gui.action.ActionRouter.performAction(ActionRouter.java:80) ~[ApacheJMeter_core.jar:3.3 r1808647]
    at org.apache.jmeter.gui.action.ActionRouter.lambda$actionPerformed$0(ActionRouter.java:65) ~[ApacheJMeter_core.jar:3.3 r1808647]
    at java.awt.event.InvocationEvent.dispatch(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue.access$500(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue$3.run(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue$3.run(Unknown Source) [?:1.8.0_144]
    at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_144]
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue.dispatchEvent(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.ClassNotFoundException: okhttp3.MediaType
    at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_144]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
    ... 26 more
2017-10-17 14:35:30,212 ERROR o.a.j.g.a.AddToTree: Exception while adding a component to tree.
java.lang.RuntimeException: java.lang.NoClassDefFoundError: okhttp3/MediaType
    at org.apache.jmeter.gui.GuiPackage.createTestElement(GuiPackage.java:359) ~[ApacheJMeter_core.jar:3.3 r1808647]
    at org.apache.jmeter.gui.action.AddToTree.doAction(AddToTree.java:68) ~[ApacheJMeter_core.jar:3.3 r1808647]
    at org.apache.jmeter.gui.action.ActionRouter.performAction(ActionRouter.java:80) ~[ApacheJMeter_core.jar:3.3 r1808647]
    at org.apache.jmeter.gui.action.ActionRouter.lambda$actionPerformed$0(ActionRouter.java:65) ~[ApacheJMeter_core.jar:3.3 r1808647]
    at java.awt.event.InvocationEvent.dispatch(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue.access$500(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue$3.run(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue$3.run(Unknown Source) [?:1.8.0_144]
    at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_144]
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) [?:1.8.0_144]
    at java.awt.EventQueue.dispatchEvent(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_144]
    at java.awt.EventDispatchThread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.NoClassDefFoundError: okhttp3/MediaType
    at net.kvak.jmeter.backendlistener.elasticsearch.ElasticsearchBackend.<clinit>(ElasticsearchBackend.java:50) ~[elasticsearch-backend-listener-1.5.jar:?]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_144]
    at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_144]
    at org.apache.jmeter.visualizers.backend.BackendListenerGui.actionPerformed(BackendListenerGui.java:166) ~[ApacheJMeter_components.jar:3.3 r1808647]
    at javax.swing.JComboBox.fireActionEvent(Unknown Source) ~[?:1.8.0_144]
    at javax.swing.JComboBox.setSelectedItem(Unknown Source) ~[?:1.8.0_144]
    at javax.swing.JComboBox.setSelectedIndex(Unknown Source) ~[?:1.8.0_144]
    at org.apache.jmeter.visualizers.backend.BackendListenerGui.clearGui(BackendListenerGui.java:281) ~[ApacheJMeter_components.jar:3.3 r1808647]
    at org.apache.jmeter.gui.GuiPackage.createTestElement(GuiPackage.java:348) ~[ApacheJMeter_core.jar:3.3 r1808647]
    ... 17 more
Caused by: java.lang.ClassNotFoundException: okhttp3.MediaType
    at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_144]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
    at net.kvak.jmeter.backendlistener.elasticsearch.ElasticsearchBackend.<clinit>(ElasticsearchBackend.java:50) ~[elasticsearch-backend-listener-1.5.jar:?]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_144]
    at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_144]
    at org.apache.jmeter.visualizers.backend.BackendListenerGui.actionPerformed(BackendListenerGui.java:166) ~[ApacheJMeter_components.jar:3.3 r1808647]
    at javax.swing.JComboBox.fireActionEvent(Unknown Source) ~[?:1.8.0_144]
    at javax.swing.JComboBox.setSelectedItem(Unknown Source) ~[?:1.8.0_144]
    at javax.swing.JComboBox.setSelectedIndex(Unknown Source) ~[?:1.8.0_144]
    at org.apache.jmeter.visualizers.backend.BackendListenerGui.clearGui(BackendListenerGui.java:281) ~[ApacheJMeter_components.jar:3.3 r1808647]
    at org.apache.jmeter.gui.GuiPackage.createTestElement(GuiPackage.java:348) ~[ApacheJMeter_core.jar:3.3 r1808647]
    ... 17 more

在plugin group 发送了问题，但没有收到任何答复。

它是否仅适用于其他插件/jar？在不同的版本上？

为什么它在 https://jmeter-plugins.org/ 中没有页面（尽管它显示在站点的搜索结果中）？

Answer 1

好的，通过插件管理器安装插件时，知道是什么导致了这个问题。基本上，在其依赖项的 JSON 文件之一中缺少键/值对。

提出了拉取请求。现在，要解决这个问题，您需要做的就是下载一些 JAR 文件并将它们放入您的“$JMETER_HOME/lib”文件夹中。

Okio 1.13.0

OkHttp 3.9.1

GSON 2.8.2

Answer 2

您的依赖项似乎缺失或版本错误。

缺少的依赖项是 okhttp 或其依赖项之一。

将它们添加到 jmeter/lib 文件夹中。

Answer 3

我是修改插件并将其放在 jmeter-plugins 上的人。这似乎是两个版本的 OkHttpClient 之间的冲突。一个由插件加载，另一个尚未找到。目前正在调查中，一旦修复将发布 2.0。

我想为延迟回答道歉（字面意思是刚刚找到你的帖子）。如需更多帮助，请哦，请随时在 GitHub 存储库页面上打开问题 :)。

https://github.com/delirius325/JMeter_ElasticsearchBackendListener/

祝你好运