Since we moved the GTK Debug bot to a new hardware there are lot of issues starting and checking the Xvfb driver. Many times it fails the check and the 3 retries it tries are not enough. It seems there are some race conditions on top of random timeouts on the checks. See for example logs: https://build.webkit.org/#/builders/63/builds/7583 https://build.webkit.org/#/builders/63/builds/7582 https://build.webkit.org/#/builders/63/builds/7580
Pull request: https://github.com/WebKit/WebKit/pull/4846
Committed 255084@main (7a5eef99ea50): <https://commits.webkit.org/255084@main> Reviewed commits have been landed. Closing PR #4846 and removing active labels.
<rdar://problem/100711657>