What does “Client failed to connect to the D-BUS daemon” mean?

Question

I am using a very complex setup to test various non-public webpages. I use jenkins to run the python-selenium tests within a dockerima

Answer 1

What does this message mean?

DBus is a message bus system for interprocess commutation. There is an open geckodriver issue on a similar if not the same subject:

• request to geckodriver fails with no meaningful log entry when there is no access to $HOME/.mozilla or $HOME/.cache

Could that be an indication of the reason why sometimes the tests are failing?

The warning should not really affect the tests but it's difficult to speculate about your intermittent test failures without seeing what is actually happening in your tests.

If so, how to fix it?

Here are some things to try:

• upgrade geckodriver to the latest stable version (currently 0.19.1)
• update Firefox to the latest nightly version (currently 58)
• try this answer
• try this answer