Zuul is the project gating and automation system that tests and merges changes as well as publishing releases and documentation.
When the cause of a test failure is nondeterministic, developers can request that it be retested by leaving a comment in Gerrit of the form "recheck bug #". This page collects those comments and displays graphs indicating the timing and frequency of these bugs.
Important reviews are ranked according to blueprint and bug priority.
A test results dashboard.