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I have a couple of tests, which I run them on windows and I have a successful run. But when I move to UBUNTU server with Xvfb, I faced problem with tests, some of them failed!!

both cases I used:

  • Maven 3.1
  • Selenide v3.5
  • Selenium v2.53
  • Firefox v45.0.1

So from where these problems? is it related to Firefox version? or I have to modify in the code somewhere?

some of them can't run:

org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:

and others can't find elements while executing.

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2 Answers 2

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If you are using Selenium v-2.53 downgrade your Mozilla Firefox version. Selenium v-2.53 has lots of issues with Mozilla Firefox version above 45. So you may use FF v-31.0. Even I have got same issue with this version & It was resolved with Selenium v-2.52 & FF V-31.0

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That's a connection issue between Selenium and Firefox. There is an open bug on it here that has some information for potential a work-around.

The issue, from what I have been able to tell is Firefox 45+ is having issues with Multithreading on a single node from Selenium. Potential fix, untested by me and from the bug report linked above, would be to downgrade Firefox.

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  • is it solved at Selenium v2.53 ?
    – Hana90
    Commented Apr 25, 2016 at 12:14
  • From the link, I would say no. It looks like issues with Selenium and FF45 with multi-threading onto a single node.
    – Paul Muir
    Commented Apr 25, 2016 at 12:15

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