{"id":951,"date":"2013-01-02T10:35:11","date_gmt":"2013-01-02T10:35:11","guid":{"rendered":"http:\/\/vskills.in\/certification\/tutorial\/?p=951"},"modified":"2024-04-12T14:13:16","modified_gmt":"2024-04-12T08:43:16","slug":"executing-parallel-tests","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/executing-parallel-tests\/","title":{"rendered":"Selenium Grid | Hub Configuration"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a ref=\"magnificPopup\" href=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Certified-Selenium-Professional-41.png\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"400\" src=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Certified-Selenium-Professional-41.png\" alt=\"Hub Configuration\" class=\"wp-image-93960\" srcset=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Certified-Selenium-Professional-41.png 750w, https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Certified-Selenium-Professional-41-300x160.png 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><\/figure><\/div>\n\n\n<h3><strong>Selenium Grid | Hub Configuration<\/strong><\/h3>\n<p>Let&#8217;s learn about Hub Configuration.<\/p>\n<ul>\n<li>To run the hub using the default options simply specify role hub to the <strong>Selenim-Server<\/strong><\/li>\n<li>java -jar selenium-server-standalone-2.44.0.jar -hub<\/li>\n<li>You should see the following logging output.<\/li>\n<li>Jul 19, 2012 10:46:21 AM org.openqa.grid.selenium.GridLauncher main<\/li>\n<li>INFO: Launching a <strong>selenium grid server<\/strong><\/li>\n<li>2012-07-19 10:46:25.082:INFO:osjs.Server:jetty-7.x.y-SNAPSHOT<\/li>\n<li>2012-07-19 10:46:25.151:INFO:osjsh.ContextHandler:started o.s.j.s.ServletContextHandler{\/,null}<\/li>\n<li>2012-07-19 10:46:25.185:INFO:osjs.AbstractConnector:Started SocketConnector@0.0.0.0:4444<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><strong>Specifying the Port &#8211; <\/strong>The default port used by the hub is 4444. The port being referred to here, is the TCP\/IP port used when the \u2018client\u2019, that is, the automated tests connect to the <strong>Selenium-Grid hub<\/strong>. If another application on computer is already using this port, or if, you already have a Selenium-Server started, you\u2019ll see the following message in the log output.<\/p>\n<p>10:56:35.490 WARN &#8211; Failed to start: SocketListener0@0.0.0.0:4444<\/p>\n<p>Exception in thread &#8220;main&#8221; java.net.BindException: Selenium is already running on port 4444. Or some other service is,<\/p>\n<ul>\n<li>If this occurs you can either shutdown the other process that is using port 4444, or you can tell <strong>Selenium-Grid<\/strong> to use a different port for its hub. Use the -port option for changing the port used by the hub.<\/li>\n<li>java -jar selenium-server-standalone-2.44.0.jar -role hub -port 4441<\/li>\n<li>This will work even if another hub is already running on the same machine, that is, as long as they\u2019re both not using port 4441.<\/li>\n<li>You may, however, want to see what process is using port 4444 so you can allow the hub to use the default. To see the ports used by all running programs on machine use the command.<\/li>\n<li>netstat -a<\/li>\n<li>This should work on all supported systems, Unix\/Linux, MacOs, and Windows although additional options beyond -a may be required. Basically you need to display the process ID along with the port. In Unix you may \u2018grep\u2019 the output (use a pipe) from the port number to only display those records you\u2019re concerned with.<\/li>\n<\/ul>\n<div class=\"apply\">\n<div class=\"apply\">\n<h3>\u00a0<\/h3>\n<p><a href=\"https:\/\/www.vskills.in\/practice\/selenium\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-93579 size-full aligncenter\" src=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Free-Practice-test-1.png\" alt=\"Selenium professional free practice test\" width=\"960\" height=\"150\" srcset=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Free-Practice-test-1.png 960w, https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Free-Practice-test-1-300x47.png 300w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a><\/p>\n<\/div>\n<\/div>\n\n\n<p><a href=\"https:\/\/www.vskills.in\/certification\/tutorial\/selenium-certification\/\" target=\"_blank\" rel=\"noreferrer noopener\">Go back to Tutorial<\/a>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <a href=\"https:\/\/www.vskills.in\/certification\/testing\/certified-selenium-professional\" target=\"_blank\" rel=\"noreferrer noopener\">Go to Home Page<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Selenium Grid | Hub Configuration Let&#8217;s learn about Hub Configuration. To run the hub using the default options simply specify role hub to the Selenim-Server java -jar selenium-server-standalone-2.44.0.jar -hub You should see the following logging output. Jul 19, 2012 10:46:21 AM org.openqa.grid.selenium.GridLauncher main INFO: Launching a selenium grid server 2012-07-19 10:46:25.082:INFO:osjs.Server:jetty-7.x.y-SNAPSHOT 2012-07-19 10:46:25.151:INFO:osjsh.ContextHandler:started o.s.j.s.ServletContextHandler{\/,null} 2012-07-19&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"categories":[350],"tags":[448,7026,349,7027,6821,7025],"class_list":["post-951","page","type-page","status-publish","hentry","category-selenium","tag-executing-parallel-tests","tag-selenium-automation-testing","tag-selenium-certification","tag-selenium-documentation","tag-selenium-professional","tag-selenium-webdriver"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Vskills Certified Selenium Grid | Hub Configuration<\/title>\n<meta name=\"description\" content=\"Learn more about Hub Configuration. 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