我得到以下stacktrace：
{
"status": 13,
"value": {
"class": "java.lang.NullPointerException",
"stackTrace": [
{
"fileName": "ExternalSessionKey.java",
"className": "org.openqa.grid.internal.ExternalSessionKey",
"methodName": "fromWebDriverRequest",
"lineNumber": 77
},
{
"fileName": "WebDriverRequest.java",
"className": "org.openqa.grid.web.servlet.handler.WebDriverRequest",
"methodName": "extractSession",
"lineNumber": 62
},
{
"fileName": "RequestHandler.java",
"className": "org.openqa.grid.web.servlet.handler.RequestHandler",
"methodName": "getSession",
"lineNumber": 237
},
{
"fileName": "RequestHandler.java",
"className": "org.openqa.grid.web.servlet.handler.RequestHandler",
"methodName": "process",
"lineNumber": 119
},
{
"fileName": "DriverServlet.java",
"className": "org.openqa.grid.web.servlet.DriverServlet",
"methodName": "process",
"lineNumber": 83
},
{
"fileName": "DriverServlet.java",
"className": "org.openqa.grid.web.servlet.DriverServlet",
"methodName": "doGet",
"lineNumber": 61
},
{
"fileName": "HttpServlet.java",
"className": "javax.servlet.http.HttpServlet",
"methodName": "service",
"lineNumber": 707
},
{
"fileName": "HttpServlet.java",
"className": "javax.servlet.http.HttpServlet",
"methodName": "service",
"lineNumber": 820
},
{
"fileName": "ServletHolder.java",
"className": "org.seleniumhq.jetty7.servlet.ServletHolder",
"methodName": "handle",
"lineNumber": 565
},
{
"fileName": "ServletHandler.java",
"className": "org.seleniumhq.jetty7.servlet.ServletHandler",
"methodName": "doHandle",
"lineNumber": 479
},
{
"fileName": "SessionHandler.java",
"className": "org.seleniumhq.jetty7.server.session.SessionHandler",
"methodName": "doHandle",
"lineNumber": 225
},
{
"fileName": "ContextHandler.java",
"className": "org.seleniumhq.jetty7.server.handler.ContextHandler",
"methodName": "doHandle",
"lineNumber": 1031
},
{
"fileName": "ServletHandler.java",
"className": "org.seleniumhq.jetty7.servlet.ServletHandler",
"methodName": "doScope",
"lineNumber": 406
},
{
"fileName": "SessionHandler.java",
"className": "org.seleniumhq.jetty7.server.session.SessionHandler",
"methodName": "doScope",
"lineNumber": 186
},
{
"fileName": "ContextHandler.java",
"className": "org.seleniumhq.jetty7.server.handler.ContextHandler",
"methodName": "doScope",
"lineNumber": 965
},
{
"fileName": "ScopedHandler.java",
"className": "org.seleniumhq.jetty7.server.handler.ScopedHandler",
"methodName": "handle",
"lineNumber": 117
},
{
"fileName": "HandlerWrapper.java",
"className": "org.seleniumhq.jetty7.server.handler.HandlerWrapper",
"methodName": "handle",
"lineNumber": 111
},
{
"fileName": "Server.java",
"className": "org.seleniumhq.jetty7.server.Server",
"methodName": "handle",
"lineNumber": 349
},
{
"fileName": "AbstractHttpConnection.java",
"className": "org.seleniumhq.jetty7.server.AbstractHttpConnection",
"methodName": "handleRequest",
"lineNumber": 452
},
{
"fileName": "BlockingHttpConnection.java",
"className": "org.seleniumhq.jetty7.server.BlockingHttpConnection",
"methodName": "handleRequest",
"lineNumber": 47
},
{
"fileName": "AbstractHttpConnection.java",
"className": "org.seleniumhq.jetty7.server.AbstractHttpConnection",
"methodName": "headerComplete",
"lineNumber": 884
},
{
"fileName": "AbstractHttpConnection.java",
"className": "org.seleniumhq.jetty7.server.AbstractHttpConnection$RequestHandler",
"methodName": "headerComplete",
"lineNumber": 938
},
{
"fileName": "HttpParser.java",
"className": "org.seleniumhq.jetty7.http.HttpParser",
"methodName": "parseNext",
"lineNumber": 634
},
{
"fileName": "HttpParser.java",
"className": "org.seleniumhq.jetty7.http.HttpParser",
"methodName": "parseAvailable",
"lineNumber": 230
},
{
"fileName": "BlockingHttpConnection.java",
"className": "org.seleniumhq.jetty7.server.BlockingHttpConnection",
"methodName": "handle",
"lineNumber": 66
},
{
"fileName": "SocketConnector.java",
"className": "org.seleniumhq.jetty7.server.bio.SocketConnector$ConnectorEndPoint",
"methodName": "run",
"lineNumber": 254
},
{
"fileName": "QueuedThreadPool.java",
"className": "org.seleniumhq.jetty7.util.thread.QueuedThreadPool",
"methodName": "runJob",
"lineNumber": 599
},
{
"fileName": "QueuedThreadPool.java",
"className": "org.seleniumhq.jetty7.util.thread.QueuedThreadPool$3",
"methodName": "run",
"lineNumber": 534
},
{
"fileName": "Thread.java",
"className": "java.lang.Thread",
"methodName": "run",
"lineNumber": 745
}
]
}
}
你见过这样的错误吗？
您是否知道如何解决此问题，因为日志文件中没有任何内容？
答案 0 :(得分：2)
在做了一些研究后，似乎这是预期的行为，不应该影响测试：
https://github.com/nicegraham/selenium-grid2-api/blob/master/README.md#wdhub