Selenium GRID -- Session terminated due to TIMEOUT after less then 100 milliseconds when invoking WebDriver.getCurrentUrl()
<p>I have a set of parallel tests which never have this problem when I run them locally. This only occurs on my piddly little two node grid. My tests are pretty consistently crapping out when I am trying to invoke <code>WebDriver.getCurrentUrl()</code>. The error message is this:</p>

<pre><code>org.openqa.selenium.WebDriverException: Session [035e8f79-fdd7-4492-a565-f803df792d3c] was terminated due to TIMEOUT
Command duration or timeout: 90 milliseconds
Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46'
System info: host: 'bos-mpky6', ip: '172.30.31.59', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.11.6', java.version: '1.8.0_102'
Driver info: org.openqa.selenium.remote.RemoteWebDriver
Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=46.0.1, platform=LINUX, nativeEvents=false, acceptSslCerts=true, webdriver.remote.sessionid=035e8f79-fdd7-4492-a565-f803df792d3c, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: 035e8f79-fdd7-4492-a565-f803df792d3c

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:701)
    at org.openqa.selenium.remote.RemoteWebDriver.getCurrentUrl(RemoteWebDriver.java:326)
</code></pre>

<p>At first, I thought this was a configuration problem, but I have configured my setup to have a a timeout much longer than a few milliseconds. Here is the configuration I use for the hub:</p>

<pre><code>{
  "host": null,
  "port": 4444,
  "newSessionWaitTimeout": -1,
  "servlets" : [],
  "prioritizer": null,
  "capabilityMatcher": "org.openqa.grid.internal.utils.DefaultCapabilityMatcher",
  "throwOnCapabilityNotPresent": true,
  "nodePolling": 5000,
  "cleanUpCycle": 5000,
  "timeout": 300000,
  "browserTimeout": 0,
  "jettyMaxThreads":-1
}
</code></pre>

<p>Here is the configuration I am using for both my nodes:</p>

<pre><code>{
   "capabilities":
   [
      {
         "browserName": "firefox",
         "version": "46.0.1",
         "platform": "LINUX",
         "maxInstances": 5
      }
   ],
   "configuration":
   {
       "proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
       "nodeTimeout":500000,
       "port":5555,
       "nodePolling":2000,
       "registerCycle":10000,
       "register":true,
       "cleanUpCycle":2000,
       "timeout":500000
   }
}
</code></pre>

<p>I am not using Docker or anything like that. I have tried versions 2.53.1, 2.53.0, 2.52.0 and 2.51.0 of the grid server and the problem continues to plague my tests. Is there something I can do to get rid of this problem? I can't find a configuration setting related to timeouts that seems to get rid of this.</p>