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raft: raft learners should be returned after applyConfChange #9116

Merged
merged 1 commit into from
Jan 11, 2018
Merged

raft: raft learners should be returned after applyConfChange #9116

merged 1 commit into from
Jan 11, 2018

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absolute8511
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This should fix issue #9087

@xiang90
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xiang90 commented Jan 8, 2018

/cc @siddontang can you please take a look?

@codecov-io
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codecov-io commented Jan 8, 2018 •
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Codecov Report

Merging #9116 into master will decrease coverage by 0.13%.
The diff coverage is 77.77%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master    #9116      +/-   ##
==========================================
- Coverage   76.25%   76.12%   -0.14%     
==========================================
  Files         359      359              
  Lines       29983    29987       +4     
==========================================
- Hits        22864    22827      -37     
- Misses       5541     5576      +35     
- Partials     1578     1584       +6
Impacted Files Coverage Δ
raft/raft.go 91.54% <100%> (+0.04%) ⬆️
raft/rawnode.go 68.33% <50%> (ø) ⬆️
raft/node.go 90.62% <50%> (-0.9%) ⬇️
pkg/transport/timeout_conn.go 80% <0%> (-20%) ⬇️
etcdserver/api/v3rpc/lease.go 78.37% <0%> (-8.11%) ⬇️
pkg/fileutil/purge.go 73.68% <0%> (-7.9%) ⬇️
etcdctl/ctlv3/command/lease_command.go 65.34% <0%> (-5.95%) ⬇️
clientv3/concurrency/session.go 88.63% <0%> (-4.55%) ⬇️
pkg/adt/interval_tree.go 88.58% <0%> (-2.41%) ⬇️
rafthttp/msgappv2_codec.go 71.3% <0%> (-1.74%) ⬇️
... and 14 more

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@siddontang
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Do we use the node function outside of raft lib? if yes, we should also handle learner nodes now.

@absolute8511
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Currently, as I know it is used only by raft lib. If any future usage maybe another pr needed.

xiang90
xiang90 reviewed Jan 10, 2018
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raft/node_test.go Outdated
s.Append(rd.Entries)
t.Logf("raft: %v", rd.Entries)
for _, ent := range rd.Entries {
if ent.Type == raftpb.EntryConfChange {
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indentation is crazy here. let us kill one indentation by doing

if ent.Type != raftpb.EntryConfChange {
    continue
}
var cc raftpb.ConfChange
...

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+1

xiang90
xiang90 reviewed Jan 10, 2018
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raft/node_test.go Outdated
if len(state.Learners) == 0 ||
state.Learners[0] != cc.NodeID ||
cc.NodeID != 2 {
t.Fatalf("apply conf change should return new added learner: %v", state.String())
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use t.Errorf

xiang90
xiang90 reviewed Jan 10, 2018
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raft/node_test.go Outdated
}

if len(state.Nodes) != 1 {
t.Fatalf("add learner should not change the nodes: %v", state.String())
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use t.errorf

@xiang90
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xiang90 commented Jan 10, 2018

@absolute8511 Can you rebase with master?

Looks good to me. @siddontang can you give this a final look?

@siddontang
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Rest LGTM

@siddontang siddontang mentioned this pull request Jan 11, 2018
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@xiang90
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xiang90 commented Jan 11, 2018

@absolute8511 can you please rebase with master, and resolve the merge conflicts? thank you.

@absolute8511 absolute8511 force-pushed the fix-raft-learner branch 2 times, most recently from fa1a0e5 to 75cdeef Compare January 11, 2018 09:22
@absolute8511
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All done @xiang90

@xiang90 xiang90 merged commit 285c7e6 into etcd-io:master Jan 11, 2018
@siddontang siddontang mentioned this pull request Jan 15, 2018
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@xiang90 xiang90 mentioned this pull request Jan 18, 2018
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@absolute8511 @xiang90 @codecov-io @siddontang