Webdriver Unable to connect to host 127 0 0 1 on port 7055 after 45000 ms

Question

I have box where I run tests  It seems like Jenkins would ssh in and execute commands described in the specific job that s running    Here I am trying to run my Selenium Webdriver tests  but it tells me that I have errors in launching firefox  The end idea is to run the webtests on this box entirely  and also take some screenshots of errors    I am using selenium-java-2 25 jar  firefox 10  linux OS   The funny thing is that I can ssh in manually into the box  temporarily copy the magic cookie from another user on the box  to get an X tunnel   do an export DISPLAY mydisplay 1 0  then launch my selenium tests using ant  And this will bring up firefox and the tests just fine   There are various threads here that seem to have the exact same problem  and I think I ve tried most of them  Here is what I ve done    Reboot the box  log back in with VNC   Placed a bash script in Jenkins to run before running selenium tests  The bash script basically just does an export DISPLAY mydisplay 1 0  It also executes xclock  This works as I can see xclock being displayed in the VNC   iptables have been turned off firefox is correctly located in  usr bin firefox sshd config shows having X11Forwarding as true  Supposedly downgrading firefox helped some people  but I do not wish to do this  Webdriver should support FF 10 anyway    However  none of the above solves the problem   It doesn t seem like port 7055 on localhost even exists   netstat -an   grep 7055 - Nothing prints  This is what my  etc hosts says     1 127 0 0 1               localhost localdomain localhost   2   1             localhost6 localdomain6 localhost6   Perhaps it has something to do with localhost 7055 not existing  I am unsure where to go from here  still  why does the error output say it s looking for display   0 0 when I ve specified mydisplay 1 0   And finally the error output I receive    testng  org openqa selenium firefox NotConnectedException  Unable to connect to host 127 0 0 1 on port 7055 after 45000 ms  Firefox console output   testng  Xlib  connection to   0 0  refused by server  testng  Xlib  No protocol specified  testng    testng  Error  cannot open display   0 0  testng  Xlib  connection to   0 0  refused by server  testng  Xlib  No protocol specified  testng    testng  Xlib  connection to   0 0  refused by server  testng  Xlib  No protocol specified  testng    testng  Xlib  connection to   0 0  refused by server  testng  Xlib  No protocol specified  testng    testng  Error  cannot open display   0 0  testng    testng     at org openqa selenium firefox internal NewProfileExtensionConnection start NewProfileExtensionConnection java 109   testng     at org openqa selenium firefox FirefoxDriver startClient FirefoxDriver java 245   testng     at org openqa selenium remote RemoteWebDriver  lt init gt  RemoteWebDriver java 109   testng     at org openqa selenium firefox FirefoxDriver  lt init gt  FirefoxDriver java 185   testng     at org openqa selenium firefox FirefoxDriver  lt init gt  FirefoxDriver java 178   testng     at org openqa selenium firefox FirefoxDriver  lt init gt  FirefoxDriver java 174   testng     at org openqa selenium firefox FirefoxDriver  lt init gt  FirefoxDriver java 92   testng     at com test webtest browser BrowserFactory createBrowser BrowserFactory java 24   testng     at sun reflect NativeMethodAccessorImpl invoke0 Native Method   testng     at sun reflect NativeMethodAccessorImpl invoke NativeMethodAccessorImpl java 57   testng     at sun reflect DelegatingMethodAccessorImpl invoke DelegatingMethodAccessorImpl java 43   testng     at java lang reflect Method invoke Method java 601

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Just Restart the terminal  Terminal is hanged nothing else  Everything will work fine after that

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Get the latest Selenium jars  2 30  for FireFox 19  You can download the latest jars  2 31 as of writing  here  https   code google com p selenium downloads list

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Installed Firefox Setup 18 0 exe it works for me

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Just install Xvnc Plugin in Jenkins  The problem should be solved

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I had the same issue with firefox 38   After using following version dependencies  I could resolve the issue        lt dependency gt           lt groupId gt org seleniumhq selenium lt  groupId gt           lt artifactId gt selenium-java lt  artifactId gt           lt version gt 2 53 0 lt  version gt       lt  dependency gt        lt dependency gt           lt groupId gt org seleniumhq selenium lt  groupId gt           lt artifactId gt selenium-firefox-driver lt  artifactId gt           lt version gt 2 53 0 lt  version gt       lt  dependency gt

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I had Firefox 47 and Selenium 2 53  and i got the same error  My solution was change Firefox 47 to Firefox 46   the problem was solved

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Don t know if you resolved this problem  but I have just resolved the same issue from the other side   It appears Selenium and Firefox have difficulty talking to each other - I suspect Firefox  evolve  changes over a number of releases  so backward and forward compatibility are not always guaranteed  and incompatibility always seems to generate the same error   My problem started when I moved from FF 15 to FF 16  Running on Ubuntu  this happens auto magically along with other upgrades but I believe this was the critical change   The problem was resolved by moving from Selenium 2 24 1 to Selenium 2 25 0  As the selenium change is just download the jar file and run it instead of the old one it s worth trying this as a quick and easy troubleshooter - if it doesn t help  just switch back   In your case  I m not sure which version of Selenium to try  but I think 2 24 should work with FF 10   Another issue I have found in the past is that Firefox would not run as root on Ubuntu   This happens if Selenium is running as a service  or possibly if it is fired up from a bash script or cron job   This may explain why it runs for you but not for Jenkins

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Solution -  1  Upgrade your Selenium Server i e  selenium jar  selenium-server-standalone-2 xx x JAR  TO  selenium-server-standalone-2 45 0 JAR   2  Upgrade your Selenium Client Driver i e  selenium libs folder  selenium-java-2 xx x  TO  selenium-java-2 45 0   3  Check and Install compatible Firefox version  Refer - Download updated selenium libs  amp  jar i e  Version 2 45 0  This will RESOLVE your problem   Cheers

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It happens on different versions of ff  I m using latest ff version 39 by using selenium-server-standalone-2 41 0 jar and selenium-java-2 41 0 zip which shows same error   Get the latest server and client jar files here for the compatibility i used server and client versions 2 47 0 and 2 47 1 respectively  And Boom  It worked

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Update selenium jars if our selenium script is not executing  Currently i am using selenium-java-2 43 0-srcs  Now it is working fine

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Me too had the same problem but issue is resolved after downgrading firefox version to 35 0 1 and my selenium version is 2 43

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The problem with the script is that the environment used for the script is not the same as the one used for your tests  so setting the environment variables there does nothing for your tests    To properly set the variable you need to set it in Jenkins  Go to Manage Jenkins Manage Nodes Master Configure  Check the Environment variables check box  then enter DISPLAY in the name box  and set the value to  1 0   Additionally you ll need to set permissions  try disabling your xhost access controls using xhost   in the terminal

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I also faced the same problem  Whenever we or webdriver opens up the FF browser will check for the updates if any  In that case  i will try to update during the execution time and then you will be getting the error even if it is updated properly just because you have not update the Selenium version appropriately   Navigate to  http   docs seleniumhq org download   and download the latest version  Now go and check  the problem would be resolved  indeed

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On Windows  Check as well the  bitness  of your Firefox  Firefox 43 0 1 64bit does not work with Selenium 2 50 0  Working well with Firefox 43 0 1 32bit

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I think this could be a problem of display  If you do not have GUI in the box  then launching firefox from selenium webdriver would give this error    To resolve this  first install Xvfb  yum install Xvfb -y   a virtual display driver  in the box  Then run your test from jenkins with xvfv-run -a -d  lt your test execution command gt   This will launch the browser in a virtual display buffer  Also it is capable of getting screenshots using selenium webdriver

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I got the same error  selenium Unable to connect to host 127 0 0 1 on port 7055  Solution   I ve used selenium-java-2 48 2 with Firefox version 43 0 1 and now its working well

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I had a similar issue  Maybe this answer will help you as well   It looks like you have two different errors going on    Unable to connect to host 127 0 0 1 on port 7055 Error  no display specified   The reason for the Unable to connect error is that the version of Selenium Server does not know how to work with the newer version of Firefox  You need to download a newer version of the Selenium Server that supports the newer version of Firefox   The reason for the Error  no display specified error is that Firefox is being launched  but there is no X server  GUI  running on the remote host  You can use X11 forwarding to run Firefox on the remote host  but display it on your local host  On Mac OS X  you will need to download XQuartz in order to use X11 forwarding

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Update selenium jars  download selenium 2 31 0  This issue has been resolved by the selenium guys  This was a compatibility issue   Cheers

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I had the exact same problem running docker but I found the solution in the log preceding the error you ve mentioned   selenium 1    2016-11-11 11 19 34 498 DEBG  xvfb  stderr output  selenium 1     EE  selenium 1    Fatal server error  selenium 1     EE  Server is already active for display 99 selenium 1      If this server is no longer running  remove  tmp  X99-lock selenium 1      and start again  selenium 1     EE    I ve followed the advice and problem has been sorted out

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I resolved this issue by downgrading my Firefox to an older version that had previously worked well with Selenium-WebDriver  In my case  I had to downgrade back to Firefox 18 and this version worked with Selenium 2 27  Here is the link to get older versions of firefox  https   ftp mozilla org pub mozilla org firefox releases

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You need to check the browser compatibility before opting to test with Selenium   https   github com SeleniumHQ selenium blob master java CHANGELOG  This might help to answer the above question

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This happens because of old versions  Just update the browser to latest version and update the selenium webdriver package to latest version

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For solve this issue  use new jar files available on http   docs seleniumhq org download   As respective to java  C   php etc   Firefox 27 0 1 require 2 39 0 of driver version

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I too was stuck at this error for three days and finally figured it out You can view the answer I have given here  This is browser and selenium server compatibility issue  I hope this helps You can check browser compatibility from this link

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Adding to the knowledge base  We had the same issue on Bamboo  The problem was resolved by using the Environmental Properties on Bamboo   DISPLAY   1    Adding the value as system properties in the pom xml  or the command line did not work

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This is how it s behaved when I  used static property of IWebDriver and call it from multiple test methods   public class LanguageMenu       private static IWebDriver drv       static LanguageMenu                drv   Driver Instance                     public static void English                 drv FindElement By Id  mvc lang en             el Click               public static void Rusian                                        Like    TestMethod   public void Language SwitchTo English           LanguageMenu English         Assert IsTrue ContactPage IsAt  Contact           TestMethod   public void Language SwitchTo Rusian           LanguageMenu English         Assert IsTrue ContactPage IsAt                   Solution  For each calling test methods create new instance of Driver   private static void English                  var drv   Driver Instance              var el   drv FindElement By Id  mvc lang en                 el Click

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This issue has haunted me for long time and I have seen one working solution in case of Firefox was to use the upgraded firefox driver     If your firefox upgrades are happening automatically than you may face this problem once in a while  Looks like Firefox guys are developing too fast  or they do not care about backward compatibility   Every time I see this issue on my old scripts I check if the firefox version has changed since - most of the times it is   Then I go to maven repo for selenium firefox driver repo - http   mvnrepository com artifact org seleniumhq selenium selenium-firefox-driver and download the latest version   or update my pom xml  if maven is used  with new version of firefox driver right now its - 2 40 0 There is no easy way to avoid this issue unless you really explicitly block the automatied update from firefox  You can do this  On Mac  in preferences - Advanced - Update - Select  Check for updates  but let me choose whether to install them   If your scripts are running on a automated mode then you may want to disable updates  However this may create other issues  Since most people user may have firefox updates enabled by default  So your application is not really being tested on any later versions

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I had the same problem today  To fix I downgraded firefox version 51 to 47 and it s working   Note  I m using a Linux Ubuntu Mate  in a Virtual Box  with host being another Ubuntu Mate  All OS are 64 bits and firefox also

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I got the same error  I ve used selenium-java version 2 25 0 and Firefox vresion 18 0 2  I ve changed the version of selenium-java to 2 30 0 and now works

[firefox] Webdriver Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms

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