1# Regression test that verifies that learners can vote. This holds only in the
2# sense that if a learner is asked to vote, a candidate believes that they are a
3# voter based on its current config, which may be more recent than that of the
4# learner. If learners which are actually voters but don't know it yet don't
5# vote in that situation, the raft group may end up unavailable despite a quorum
6# of voters (as of the latest config) being available.
7#
8# See:
9# https://github.com/etcd-io/etcd/pull/10998
10
11# Turn output off during boilerplate.
12log-level none
13----
14ok
15
16# Bootstrap three nodes.
17add-nodes 3 voters=(1,2) learners=(3) index=2
18----
19ok
20
21# n1 gets to be leader.
22campaign 1
23----
24ok
25
26stabilize
27----
28ok (quiet)
29
30# Propose a conf change on n1 that promotes n3 to voter.
31propose-conf-change 1
32v3
33----
34ok
35
36# Commit and fully apply said conf change. n1 and n2 now consider n3 a voter.
37stabilize 1 2
38----
39ok (quiet)
40
41# Drop all inflight messages to 3. We don't want it to be caught up when it is
42# asked to vote.
43deliver-msgs drop=(3)
44----
45ok (quiet)
46
47# We now pretend that n1 is dead, and n2 is trying to become leader.
48
49log-level debug
50----
51ok
52
53campaign 2
54----
55INFO 2 is starting a new election at term 1
56INFO 2 became candidate at term 2
57INFO 2 received MsgVoteResp from 2 at term 2
58INFO 2 [logterm: 1, index: 4] sent MsgVote request to 1 at term 2
59INFO 2 [logterm: 1, index: 4] sent MsgVote request to 3 at term 2
60
61# Send out the MsgVote requests.
62process-ready 2
63----
64Ready MustSync=true:
65Lead:0 State:StateCandidate
66HardState Term:2 Vote:2 Commit:4
67Messages:
682->1 MsgVote Term:2 Log:1/4
692->3 MsgVote Term:2 Log:1/4
70
71# n2 is now campaigning while n1 is down (does not respond). The latest config
72# has n3 as a voter, but n3 doesn't even have the corresponding conf change in
73# its log. Still, it casts a vote for n2 which can in turn become leader and
74# catches up n3.
75stabilize 3
76----
77> 3 receiving messages
78 2->3 MsgVote Term:2 Log:1/4
79 INFO 3 [term: 1] received a MsgVote message with higher term from 2 [term: 2]
80 INFO 3 became follower at term 2
81 INFO 3 [logterm: 1, index: 3, vote: 0] cast MsgVote for 2 [logterm: 1, index: 4] at term 2
82> 3 handling Ready
83 Ready MustSync=true:
84 Lead:0 State:StateFollower
85 HardState Term:2 Vote:2 Commit:3
86 Messages:
87 3->2 MsgVoteResp Term:2 Log:0/0
88
89stabilize 2 3
90----
91> 2 receiving messages
92 3->2 MsgVoteResp Term:2 Log:0/0
93 INFO 2 received MsgVoteResp from 3 at term 2
94 INFO 2 has received 2 MsgVoteResp votes and 0 vote rejections
95 INFO 2 became leader at term 2
96> 2 handling Ready
97 Ready MustSync=true:
98 Lead:2 State:StateLeader
99 Entries:
100 2/5 EntryNormal ""
101 Messages:
102 2->1 MsgApp Term:2 Log:1/4 Commit:4 Entries:[2/5 EntryNormal ""]
103 2->3 MsgApp Term:2 Log:1/4 Commit:4 Entries:[2/5 EntryNormal ""]
104> 3 receiving messages
105 2->3 MsgApp Term:2 Log:1/4 Commit:4 Entries:[2/5 EntryNormal ""]
106 DEBUG 3 [logterm: 0, index: 4] rejected MsgApp [logterm: 1, index: 4] from 2
107> 3 handling Ready
108 Ready MustSync=false:
109 Lead:2 State:StateFollower
110 Messages:
111 3->2 MsgAppResp Term:2 Log:1/4 Rejected (Hint: 3)
112> 2 receiving messages
113 3->2 MsgAppResp Term:2 Log:1/4 Rejected (Hint: 3)
114 DEBUG 2 received MsgAppResp(rejected, hint: (index 3, term 1)) from 3 for index 4
115 DEBUG 2 decreased progress of 3 to [StateProbe match=0 next=4]
116> 2 handling Ready
117 Ready MustSync=false:
118 Messages:
119 2->3 MsgApp Term:2 Log:1/3 Commit:4 Entries:[1/4 EntryConfChangeV2 v3, 2/5 EntryNormal ""]
120> 3 receiving messages
121 2->3 MsgApp Term:2 Log:1/3 Commit:4 Entries:[1/4 EntryConfChangeV2 v3, 2/5 EntryNormal ""]
122> 3 handling Ready
123 Ready MustSync=true:
124 HardState Term:2 Vote:2 Commit:4
125 Entries:
126 1/4 EntryConfChangeV2 v3
127 2/5 EntryNormal ""
128 CommittedEntries:
129 1/4 EntryConfChangeV2 v3
130 Messages:
131 3->2 MsgAppResp Term:2 Log:0/5
132 INFO 3 switched to configuration voters=(1 2 3)
133> 2 receiving messages
134 3->2 MsgAppResp Term:2 Log:0/5
135> 2 handling Ready
136 Ready MustSync=false:
137 HardState Term:2 Vote:2 Commit:5
138 CommittedEntries:
139 2/5 EntryNormal ""
140 Messages:
141 2->3 MsgApp Term:2 Log:2/5 Commit:5
142> 3 receiving messages
143 2->3 MsgApp Term:2 Log:2/5 Commit:5
144> 3 handling Ready
145 Ready MustSync=false:
146 HardState Term:2 Vote:2 Commit:5
147 CommittedEntries:
148 2/5 EntryNormal ""
149 Messages:
150 3->2 MsgAppResp Term:2 Log:0/5
151> 2 receiving messages
152 3->2 MsgAppResp Term:2 Log:0/5
View as plain text