Docker-selenium: "java.lang.NullPointerException"

[vgoklani]

I ran the following

docker run -d -p 4444:4444 -e JAVA_OPTS=-Xmx512m --name selenium-hub selenium/hub

opened a browser on my mac with this link: http://127.0.0.1:4444/wd/hub

and saw this:

    {
    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: 58
    },
    {
    fileName: "RequestHandler.java",
    className: "org.openqa.grid.web.servlet.handler.RequestHandler",
    methodName: "getSession",
    lineNumber: 231
    },
    {
    fileName: "RequestHandler.java",
    className: "org.openqa.grid.web.servlet.handler.RequestHandler",
    methodName: "process",
    lineNumber: 117
    },
    {
    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: 687
    },
    {
    fileName: "HttpServlet.java",
    className: "javax.servlet.http.HttpServlet",
    methodName: "service",
    lineNumber: 790
    },
    {
    fileName: "ServletHolder.java",
    className: "org.seleniumhq.jetty9.servlet.ServletHolder",
    methodName: "handle",
    lineNumber: 841
    },
    {
    fileName: "ServletHandler.java",
    className: "org.seleniumhq.jetty9.servlet.ServletHandler",
    methodName: "doHandle",
    lineNumber: 543
    },
    {
    fileName: "ScopedHandler.java",
    className: "org.seleniumhq.jetty9.server.handler.ScopedHandler",
    methodName: "nextHandle",
    lineNumber: 188
    },
    {
    fileName: "SessionHandler.java",
    className: "org.seleniumhq.jetty9.server.session.SessionHandler",
    methodName: "doHandle",
    lineNumber: 1584
    },
    {
    fileName: "ScopedHandler.java",
    className: "org.seleniumhq.jetty9.server.handler.ScopedHandler",
    methodName: "nextHandle",
    lineNumber: 188
    },
    {
    fileName: "ContextHandler.java",
    className: "org.seleniumhq.jetty9.server.handler.ContextHandler",
    methodName: "doHandle",
    lineNumber: 1228
    },
    {
    fileName: "ScopedHandler.java",
    className: "org.seleniumhq.jetty9.server.handler.ScopedHandler",
    methodName: "nextScope",
    lineNumber: 168
    },
    {
    fileName: "ServletHandler.java",
    className: "org.seleniumhq.jetty9.servlet.ServletHandler",
    methodName: "doScope",
    lineNumber: 481
    },
    {
    fileName: "SessionHandler.java",
    className: "org.seleniumhq.jetty9.server.session.SessionHandler",
    methodName: "doScope",
    lineNumber: 1553
    },
    {
    fileName: "ScopedHandler.java",
    className: "org.seleniumhq.jetty9.server.handler.ScopedHandler",
    methodName: "nextScope",
    lineNumber: 166
    },
    {
    fileName: "ContextHandler.java",
    className: "org.seleniumhq.jetty9.server.handler.ContextHandler",
    methodName: "doScope",
    lineNumber: 1130
    },
    {
    fileName: "ScopedHandler.java",
    className: "org.seleniumhq.jetty9.server.handler.ScopedHandler",
    methodName: "handle",
    lineNumber: 141
    },
    {
    fileName: "HandlerWrapper.java",
    className: "org.seleniumhq.jetty9.server.handler.HandlerWrapper",
    methodName: "handle",
    lineNumber: 132
    },
    {
    fileName: "Server.java",
    className: "org.seleniumhq.jetty9.server.Server",
    methodName: "handle",
    lineNumber: 564
    },
    {
    fileName: "HttpChannel.java",
    className: "org.seleniumhq.jetty9.server.HttpChannel",
    methodName: "handle",
    lineNumber: 320
    },
    {
    fileName: "HttpConnection.java",
    className: "org.seleniumhq.jetty9.server.HttpConnection",
    methodName: "onFillable",
    lineNumber: 251
    },
    {
    fileName: "AbstractConnection.java",
    className: "org.seleniumhq.jetty9.io.AbstractConnection$ReadCallback",
    methodName: "succeeded",
    lineNumber: 279
    },
    {
    fileName: "FillInterest.java",
    className: "org.seleniumhq.jetty9.io.FillInterest",
    methodName: "fillable",
    lineNumber: 112
    },
    {
    fileName: "ChannelEndPoint.java",
    className: "org.seleniumhq.jetty9.io.ChannelEndPoint$2",
    methodName: "run",
    lineNumber: 124
    },
    {
    fileName: "QueuedThreadPool.java",
    className: "org.seleniumhq.jetty9.util.thread.QueuedThreadPool",
    methodName: "runJob",
    lineNumber: 672
    },
    {
    fileName: "QueuedThreadPool.java",
    className: "org.seleniumhq.jetty9.util.thread.QueuedThreadPool$2",
    methodName: "run",
    lineNumber: 590
    },
    {
    fileName: "Thread.java",
    className: "java.lang.Thread",
    methodName: "run",
    lineNumber: 745
    }
    ]
    }

What am I doing wrong?

[diemol]

@vgoklani
That is the correct output for that url.

If you want to see the grid console, go to http://127.0.0.1:4444/grid/console