selenium webdriver - Jenkins SeleniumGrid Cannot maintain connection to nodes -


i running selenium grid several remote machines, windows server2012. same grid used work set of windows 7 vms, took whole system offline several weeks, , when trying spin new set of vms, can't seem tests running.

i using nightwatchjs develop , run tests. when attempt run tests following error:

12:29:43 [91m12:29:40[39m [1;31merror retrieving new session  selenium server[0m 12:29:43 [91m12:29:40[39m [0;31mconnection refused! selenium  server started? 12:29:43 [91m12:29:40[39m [0m 12:29:43 [91m12:29:40[39m [0;90m{ error: socket hang 12:29:43 [91m12:29:40[39m     @ createhanguperror  (_http_client.js:253:15) 12:29:43 [91m12:29:40[39m     @ socket.socketcloselistener  (_http_client.js:285:23) 12:29:43 [91m12:29:40[39m     @ emitone (events.js:101:20) 12:29:43 [91m12:29:40[39m     @ socket.emit (events.js:188:7) 12:29:43 [91m12:29:40[39m     @ tcp._handle.close [as _onclose]  (net.js:497:12) code: 'econnreset' }[0m

i have verified server running on intended selenium node , registers correctly seleniumgrid running on jenkins machine. appears in list of registered remote controls on plug-in main screen.

i reviewed seleniumgrid console in jenkins , see following logs seem indicate that grid receiving registration signal, can't connect after that:

sep 12, 2017 12:27:14 pm hudson.plugins.selenium.hublauncher call off: grid hub started on port 4444 args: -maxsession 5 -timeout  300 -browsertimeout 0 -host jenkins2.rsp.redacted.com sep 12, 2017 12:27:24 pm org.openqa.grid.internal.registry add info: registered node http://10.redacted.11:5555 sep 12, 2017 12:27:44 pm  org.openqa.grid.selenium.proxy.defaultremoteproxy onevent info: marking node http://10.redacted.11:5555 down: cannot  reach node 2 tries channel stopped

my next step review security settings on both jenkins machine , node. on node went little crazy , enabled incoming connections on ports. on jenkins enabled 34011 , 4444 bypass firewall. no change in results.

to try , further narrow down issue, set second selenium grid on laptop (same network) , tried use run tests off server2012 vm. voila! worked. leads me believe sort of configuration issue jenkins , plug-in.

i further tested setting laptop node , tried run tests. same issue -- node registers jenkins grid, shows in registered remote controls, not respond when try pipe tests down it.

this being run nightwatch, below nightwatch.json:

{   "src_folders" : [     "tests",      "tests/account",     "tests/checkout",     "tests/navigation",     "tests/navigation/about",     "tests/navigation/career",     "tests/development",     "tests/merchandise",     "tests/cart",   ],   "output_folder" : "reports",   "custom_commands_path" : "",   "custom_assertions_path" : "",   "page_objects_path" : "pages",   "globals_path" : "globals",    "test_workers":{     "enabled": true,     "workers": 1   },    "selenium" : {     "start_process" : false,     "server_path" : "/dpm/selenium/selenium-server-standalone-3.4.0.jar",     "log_path" : "",     "port" : 4444,     "cli_args" : {       "webdriver.chrome.driver" : "drivers/chromedriver",       "webdriver.gecko.driver" : "drivers/geckodriver15",       "webdriver.edge.driver" : "",       "webdriver.ie.driver" : ""     }   },    "test_settings" : {     "default" : {       "launch_url" : "https://stage.redacted.com",       "selenium_port"  : 4444,       "selenium_host"  : "localhost",       "silent": true,       "medium_time_out": 6000,       "screenshots" : {         "enabled" : false,         "path" : ""       },       "desiredcapabilities": {         "browsername": "firefox",         "marionette": true       }     },      "ie" : {       "desiredcapabilities": {         "browsername": "internet explorer"       }     },      "firefox" : {       "desiredcapabilities": {         "browsername": "firefox",         "marionette": true       }     },      "chrome" : {       "desiredcapabilities": {         "browsername": "chrome"       }     },      "edge" : {       "desiredcapabilities": {         "browsername": "microsoftedge"       }     },      "safari" : {       "desiredcapabilities": {         "browsername": "safari",         "javascriptenabled" : true,         "acceptsslcerts" : true       }     }   },   "production" : {     "launch_url" : "http://www.redacted.com",      "selenium_port"  : 4444,       "selenium_host"  : "localhost",       "silent": true,       "screenshots" : {         "enabled" : false,         "path" : ""       },       "desiredcapabilities": {         "browsername": "firefox",         "marionette": true       }     } }


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