{"action":"created","issue":{"url":"https://api.github.com/repos/SeleniumHQ/selenium/issues/1646","repository_url":"https://api.github.com/repos/SeleniumHQ/selenium","labels_url":"https://api.github.com/repos/SeleniumHQ/selenium/issues/1646/labels{/name}","comments_url":"https://api.github.com/repos/SeleniumHQ/selenium/issues/1646/comments","events_url":"https://api.github.com/repos/SeleniumHQ/selenium/issues/1646/events","html_url":"https://github.com/SeleniumHQ/selenium/issues/1646","id":134038546,"number":1646,"title":"Selenium-hub 2.52.0 crashes after updating webdriver","user":{"login":"cristim","id":95209,"avatar_url":"https://avatars.githubusercontent.com/u/95209?v=3","gravatar_id":"","url":"https://api.github.com/users/cristim","html_url":"https://github.com/cristim","followers_url":"https://api.github.com/users/cristim/followers","following_url":"https://api.github.com/users/cristim/following{/other_user}","gists_url":"https://api.github.com/users/cristim/gists{/gist_id}","starred_url":"https://api.github.com/users/cristim/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cristim/subscriptions","organizations_url":"https://api.github.com/users/cristim/orgs","repos_url":"https://api.github.com/users/cristim/repos","events_url":"https://api.github.com/users/cristim/events{/privacy}","received_events_url":"https://api.github.com/users/cristim/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":5,"created_at":"2016-02-16T17:08:53Z","updated_at":"2016-02-16T18:49:32Z","closed_at":"2016-02-16T18:34:37Z","body":"We recently updated all our Selenium infrastructure from 2.43.1 to 2.52.0, and the browsers from Firefox 33 to 44. The last piece we updated was the selenium-webdriver npm module, which we updated from 2.48.2 to 2.52.0.\r\n\r\nOnce this change was implemented, we started observing complete test failures and the selenium hub logs are full of errors like this:\r\n\r\n```\r\n        at org.openqa.grid.web.servlet.DriverServlet.process(DriverServlet.java:126)\r\n        at org.openqa.grid.web.servlet.DriverServlet.doPost(DriverServlet.java:67)\r\n        at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)\r\n        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)\r\n        at org.seleniumhq.jetty9.servlet.ServletHolder.handle(ServletHolder.java:808)\r\n        at org.seleniumhq.jetty9.servlet.ServletHandler.doHandle(ServletHandler.java:587)\r\n        at org.seleniumhq.jetty9.server.session.SessionHandler.doHandle(SessionHandler.java:221)\r\n        at org.seleniumhq.jetty9.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)\r\n        at org.seleniumhq.jetty9.servlet.ServletHandler.doScope(ServletHandler.java:515)\r\n        at org.seleniumhq.jetty9.server.session.SessionHandler.doScope(SessionHandler.java:185)\r\n        at org.seleniumhq.jetty9.server.handler.ContextHandler.doScope(ContextHandler.java:1061)\r\n        at org.seleniumhq.jetty9.server.handler.ScopedHandler.handle(ScopedHandler.java:141)\r\n        at org.seleniumhq.jetty9.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)\r\n        at org.seleniumhq.jetty9.server.Server.handle(Server.java:499)\r\n        at org.seleniumhq.jetty9.server.HttpChannel.handle(HttpChannel.java:310)\r\n        at org.seleniumhq.jetty9.server.HttpConnection.onFillable(HttpConnection.java:257)\r\n        at org.seleniumhq.jetty9.io.AbstractConnection$2.run(AbstractConnection.java:540)\r\n        at org.seleniumhq.jetty9.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)\r\n        at org.seleniumhq.jetty9.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)\r\n        at java.lang.Thread.run(Unknown Source)\r\nCaused by: \r\njava.lang.IllegalStateException: Not a JSON Object: [[\"browserName\",\"firefox\"],[\"firefox_profile\",\"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\"]]\r\n\r\n```\r\n\r\nWe can always reproduce it and reverting webdriver to  2.48.2 is a workaround for our issue.\r\nWe also use the latest version of the firefox-profile npm module, which hasn't been changed for about a year now."},"comment":{"url":"https://api.github.com/repos/SeleniumHQ/selenium/issues/comments/184824061","html_url":"https://github.com/SeleniumHQ/selenium/issues/1646#issuecomment-184824061","issue_url":"https://api.github.com/repos/SeleniumHQ/selenium/issues/1646","id":184824061,"user":{"login":"barancev","id":617090,"avatar_url":"https://avatars.githubusercontent.com/u/617090?v=3","gravatar_id":"","url":"https://api.github.com/users/barancev","html_url":"https://github.com/barancev","followers_url":"https://api.github.com/users/barancev/followers","following_url":"https://api.github.com/users/barancev/following{/other_user}","gists_url":"https://api.github.com/users/barancev/gists{/gist_id}","starred_url":"https://api.github.com/users/barancev/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/barancev/subscriptions","organizations_url":"https://api.github.com/users/barancev/orgs","repos_url":"https://api.github.com/users/barancev/repos","events_url":"https://api.github.com/users/barancev/events{/privacy}","received_events_url":"https://api.github.com/users/barancev/received_events","type":"User","site_admin":false},"created_at":"2016-02-16T18:49:32Z","updated_at":"2016-02-16T18:49:32Z","body":"The mentioned issue is not related to a specific browser, it's a serialization problem."}}