Sheriffing/Deciding To Close A Tree

=Deciding to close a tree

Many objective and subjective criteria are part of deciding to close a tree. Tree closure means that developers are prevented from pushing or merging code to a codebase. Later, sheriffs will reopen the trees when the problem appears to be resolved.

Some of the criteria used include:

• Broken build on an integration or main tree (e.g. mozilla-inbound, mozilla-central, fxteam)
• Excessive backlog for builds or tests in any platform
• Infrastructure or systems failures that affect a significant number of tests or builds (e.g. AWS, data center, networking issues)