Selenium WebDriver throwing an error for Click action, but Click is actually successful
The same kind of error is reported in docker-selenium issue 163, and seems related to selenium alone.
That is why there now (Aug. 2017) is SeleniumHQ/selenium issue 4384 (now Oct. 2017 closed, as a "performance issue").
That error was also seen in docker-selenium issue 20 (2015) with this comment, more about Chrome crashing:
Started in privileged mode:
docker run --privilegedFix small /dev/shm size
docker exec $id sudo umount /dev/shmdocker exec $id sudo mount -t tmpfs -o rw,nosuid,nodev,noexec,relatime,size=512M tmpfs /dev/shm
Update End 2017: issue 163 mentions
Maybe there is a bug in supervisord, you can try to bump the version or even go back to an older one.