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虽然试图在Angular Application上运行Protractor e2e测试，但是我的WebDriver Manager却抛出了NullPointerException异常。WebDriver Manager在尝试运行Protractor e2e测试时抛出java NullPointerException
这个问题是不是关于NullPointerException的一个问题。这是一个关于如何获得量角器和端到端测试工作的问题。
我比较了我的设置与同事，比较环境变量，铬版本等，他们都匹配。然而，它对他有用，但立即失败在我的开箱。
通过比较我们的输出，失败的线是当它正在寻找一个处理程序。在我同事的系统控制台输出为：
12:03:50.295 INFO - Found handler: [email protected]
12:03:50.296 INFO - Handler thread for session 397d539330b46b88d3df3471e0cc30a6 (chrome): Executing POST on /session/397d539330b46b88d3df3471e0cc30a6/timeouts (handler: ServicedSession)
12:03:50.301 INFO - To upstream: {"type":"script","ms":30000}
12:03:50.305 INFO - To downstream: {"sessionId":"397d539330b46b88d3df3471e0cc30a6","status":0,"value":null}
但是在我的dev的盒子，在这一点上，我得到以下几点：
2017-08-15 12:00:42.145:WARN:osjs.HttpChannel:qtp1227229563-14: /wd/hub/session
java.lang.NullPointerException
at com.google.gson.JsonPrimitive.isPrimitiveOrString(JsonPrimitive.java:278)
at com.google.gson.JsonPrimitive.setValue(JsonPrimitive.java:101)
at com.google.gson.JsonPrimitive.<init>(JsonPrimitive.java:65)
at org.openqa.selenium.remote.server.ExceptionHandler.lambda$execute$0(ExceptionHandler.java:82)
at java.util.stream.ReferencePipeline$3$1.accept(Unknown Source)
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Unknown Source)
at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
at java.util.stream.ReferencePipeline.collect(Unknown Source)
at org.openqa.selenium.remote.server.ExceptionHandler.execute(ExceptionHandler.java:88)
at org.openqa.selenium.remote.server.WebDriverServlet.handle(WebDriverServlet.java:247)
at org.openqa.selenium.remote.server.WebDriverServlet.doPost(WebDriverServlet.java:151)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at org.openqa.selenium.remote.server.WebDriverServlet.service(WebDriverServlet.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.seleniumhq.jetty9.servlet.ServletHolder.handle(ServletHolder.java:841)
at org.seleniumhq.jetty9.servlet.ServletHandler.doHandle(ServletHandler.java:535)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.seleniumhq.jetty9.security.SecurityHandler.handle(SecurityHandler.java:548)
at org.seleniumhq.jetty9.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
at org.seleniumhq.jetty9.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
at org.seleniumhq.jetty9.servlet.ServletHandler.doScope(ServletHandler.java:473)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
at org.seleniumhq.jetty9.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
at org.seleniumhq.jetty9.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.seleniumhq.jetty9.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.seleniumhq.jetty9.server.Server.handle(Server.java:564)
at org.seleniumhq.jetty9.server.HttpChannel.handle(HttpChannel.java:317)
at org.seleniumhq.jetty9.server.HttpConnection.onFillable(HttpConnection.java:251)
at org.seleniumhq.jetty9.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
at org.seleniumhq.jetty9.io.FillInterest.fillable(FillInterest.java:110)
at org.seleniumhq.jetty9.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
at org.seleniumhq.jetty9.util.thread.Invocable.invokePreferred(Invocable.java:128)
at org.seleniumhq.jetty9.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
at org.seleniumhq.jetty9.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
at org.seleniumhq.jetty9.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
at org.seleniumhq.jetty9.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
at org.seleniumhq.jetty9.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
at java.lang.Thread.run(Unknown Source)
什么的问题可能是有什么想法？
@WilliamHampshire谢谢，不过selenium-webdriver是作为对量角器的依赖。我已经卸载并重新安装了量角器几次，并没有任何区别 –
可能重复[什么是NullPointerException，以及如何解决它？]（https://stackoverflow.com/questions/218384/what-is- a-nullpointerexception-and-how-do-i-fix-it） – JeffC
@JeffC害怕NullPointerException是一个效果而不是原因。问题是如何让量角器工作并处理它正在抛出的错误。 –