Pick one and press Start, then click Next › to step through it.
Watch for
Participants frozen in the 'prepared/uncertain' state while the coordinator is down — holding locks, unable to proceed until it returns.
More about this scenario
You'll learn
The defining weakness of two-phase commit — a coordinator failure can leave participants blocked and uncertain.
How it runs
PREPARE collects yes-votes and locks each participant. The coordinator crashes before sending commit, so participants are stuck — they've promised to commit but can't decide alone. RECOVER replays the coordinator's log and COMPLETE finishes the commit.