raft_start(): io: closed segment 0000000000003069-0000000000003157 is past last snapshot

[MathieuBordere]

Recently there have been a couple of failures in the Jepsen suite with the failure listed in the title, it looks related to segment truncation.

run 1 - artifact 1

---

run 2 - artifact 2

[MathieuBordere]

A first analysis points in the direction of the UvTruncate barrier callback that is never fired if a barrier is already active, in these cases a snapshot barrier.

[MathieuBordere]

I think it's related to all currently open segments being involved in a barrier, this results in the truncate barrier never "attaching" to an open segment, resulting in the barrier callback to never be fired.

raft/src/uv_append.c

Line 776 in d9e5752

if (segment->barrier != NULL) {

Will investigate further to confirm suspicions.

[cole-miller]

Can this be closed now that #435 is merged?

[MathieuBordere]

Can this be closed now that #435 is merged?

yes

[MathieuBordere]

fixed