I recorded that recreating the runs directory with a fresh inode preceded
recovery. It recurred afterwards (build 1252), so that was not the fix.
The real signal is that it is INTERMITTENT and tracks concurrent activity: every
failure landed while a second run or manual deploy was in flight, and every build
on a quiet host passed (1243, 1250, 1251, 1253). Free space never moves during a
failing build. Practical guidance is therefore to wait for the host to go quiet
and re-trigger before calling it a recipe failure, and DRONE_RUNNER_CAPACITY=2 is
the obvious knob to test if it becomes disruptive.
Root cause still not established, and the note now says so plainly rather than
presenting a coincidence as understood.
autonomic-bot
94ce5c4de2