During a full build of Couchbase server analytics is extremely verbose in the output which makes it harder to spot warnings or errors from other modules (when using parallel builds).
Please change the default output level to warnings.
I've been using the workaround:
Changing the default is a better option as it would also affect the emails being sent as part of the nightly build failures. In some occurrences the actual error was not present in the email due to too much INFO output from analytics.
INFO output belongs to running