Update the test vote.txt to demo the node being de-priotized on next …

…campaign When a node lost the vote, it will be de-prioritized on the next campaign. Its randomized election timeout is in range [2*electionTime, 3*electionTime). Signed-off-by: Benjamin Wang <[email protected]>
etcd-io · Mar 7, 2024 · c1dc248 · c1dc248
1 parent cf0b9c3
commit c1dc248
Showing 1 changed file with 83 additions and 31 deletions.
diff --git a/testdata/vote.txt b/testdata/vote.txt
@@ -1,5 +1,5 @@
-# Tests that a node that is behind on the log will lose the vote.
-# It will still lose the vote when campaign again.
+# Tests that a node that is behind on the log will lose the vote. Other nodes
+# will have higher priority to start next campaign within current term.
 
 log-level none
 ----
@@ -97,15 +97,17 @@ raft-log 2
 ----
 1/11 EntryNormal ""
 
-# tick both nodes 9 times, it will trigger both to campaign, but
-# we will let node 2 try first. It will lose the vote due to log
-# being lag behind.
+# tick both nodes 9 times, and let node 2 try first.
+# 2 is de-prioritized on the next campaign. Its randomized election timeout
+# is in range [2*electionTime, 3*electionTime), namely [10, 15). So 9 ticks
+# shouldn't trigger the campaign.
 tick 2 9
 ----
-INFO 2 is starting a new election at term 2
-INFO 2 became candidate at term 3
-INFO 2 [logterm: 1, index: 11] sent MsgVote request to 1 at term 3
+ok
 
+# node 1's randomized election timeout doesn't change, it's still in range
+# [electionTime, 2*electionTime), namely [5, 10). So 9 ticks will definitely
+# trigger the campaign.
 tick 1 9
 ----
 INFO 1 is starting a new election at term 2
@@ -115,18 +117,11 @@ INFO 1 [logterm: 1, index: 12] sent MsgVote request to 2 at term 3
 # let node 2 try first
 process-ready 2
 ----
-Ready MustSync=true:
-Lead:0 State:StateCandidate
-HardState Term:3 Vote:2 Commit:11
-Messages:
-2->1 MsgVote Term:3 Log:1/11
-INFO 2 received MsgVoteResp from 2 at term 3
-INFO 2 has received 1 MsgVoteResp votes and 0 vote rejections
+<empty Ready>
 
 deliver-msgs 1
 ----
-2->1 MsgVote Term:3 Log:1/11
-INFO 1 [logterm: 1, index: 12, vote: 1] rejected MsgVote from 2 [logterm: 1, index: 11] at term 3
+no messages
 
 stabilize
 ----
@@ -136,40 +131,97 @@ stabilize
   HardState Term:3 Vote:1 Commit:11
   Messages:
   1->2 MsgVote Term:3 Log:1/12
-  1->2 MsgVoteResp Term:3 Log:0/0 Rejected (Hint: 0)
   INFO 1 received MsgVoteResp from 1 at term 3
   INFO 1 has received 1 MsgVoteResp votes and 0 vote rejections
 > 2 receiving messages
   1->2 MsgVote Term:3 Log:1/12
-  INFO 2 [logterm: 1, index: 11, vote: 2] rejected MsgVote from 1 [logterm: 1, index: 12] at term 3
-  1->2 MsgVoteResp Term:3 Log:0/0 Rejected (Hint: 0)
-  INFO 2 received MsgVoteResp rejection from 1 at term 3
-  INFO 2 has received 1 MsgVoteResp votes and 1 vote rejections
+  INFO 2 [term: 2] received a MsgVote message with higher term from 1 [term: 3]
   INFO 2 became follower at term 3
+  INFO 2 [logterm: 1, index: 11, vote: 0] cast MsgVote for 1 [logterm: 1, index: 12] at term 3
+> 2 handling Ready
+  Ready MustSync=true:
+  HardState Term:3 Vote:1 Commit:11
+  Messages:
+  2->1 MsgVoteResp Term:3 Log:0/0
+> 1 receiving messages
+  2->1 MsgVoteResp Term:3 Log:0/0
+  INFO 1 received MsgVoteResp from 2 at term 3
+  INFO 1 has received 2 MsgVoteResp votes and 0 vote rejections
+  INFO 1 became leader at term 3
+> 1 handling Ready
+  Ready MustSync=true:
+  Lead:1 State:StateLeader
+  Entries:
+  3/13 EntryNormal ""
+  Messages:
+  1->2 MsgApp Term:3 Log:1/12 Commit:11 Entries:[3/13 EntryNormal ""]
+> 2 receiving messages
+  1->2 MsgApp Term:3 Log:1/12 Commit:11 Entries:[3/13 EntryNormal ""]
+  DEBUG 2 [logterm: 0, index: 12] rejected MsgApp [logterm: 1, index: 12] from 1
 > 2 handling Ready
   Ready MustSync=false:
-  Lead:0 State:StateFollower
+  Lead:1 State:StateFollower
   Messages:
-  2->1 MsgVoteResp Term:3 Log:0/0 Rejected (Hint: 0)
+  2->1 MsgAppResp Term:3 Log:1/12 Rejected (Hint: 11)
 > 1 receiving messages
-  2->1 MsgVoteResp Term:3 Log:0/0 Rejected (Hint: 0)
-  INFO 1 received MsgVoteResp rejection from 2 at term 3
-  INFO 1 has received 1 MsgVoteResp votes and 1 vote rejections
-  INFO 1 became follower at term 3
+  2->1 MsgAppResp Term:3 Log:1/12 Rejected (Hint: 11)
+  DEBUG 1 received MsgAppResp(rejected, hint: (index 11, term 1)) from 2 for index 12
+  DEBUG 1 decreased progress of 2 to [StateProbe match=0 next=12]
 > 1 handling Ready
   Ready MustSync=false:
-  Lead:0 State:StateFollower
+  Messages:
+  1->2 MsgApp Term:3 Log:1/11 Commit:11 Entries:[
+    1/12 EntryNormal "foo"
+    3/13 EntryNormal ""
+  ]
+> 2 receiving messages
+  1->2 MsgApp Term:3 Log:1/11 Commit:11 Entries:[
+    1/12 EntryNormal "foo"
+    3/13 EntryNormal ""
+  ]
+> 2 handling Ready
+  Ready MustSync=true:
+  Entries:
+  1/12 EntryNormal "foo"
+  3/13 EntryNormal ""
+  Messages:
+  2->1 MsgAppResp Term:3 Log:0/13
+> 1 receiving messages
+  2->1 MsgAppResp Term:3 Log:0/13
+> 1 handling Ready
+  Ready MustSync=false:
+  HardState Term:3 Vote:1 Commit:13
+  CommittedEntries:
+  1/12 EntryNormal "foo"
+  3/13 EntryNormal ""
+  Messages:
+  1->2 MsgApp Term:3 Log:3/13 Commit:13
+> 2 receiving messages
+  1->2 MsgApp Term:3 Log:3/13 Commit:13
+> 2 handling Ready
+  Ready MustSync=false:
+  HardState Term:3 Vote:1 Commit:13
+  CommittedEntries:
+  1/12 EntryNormal "foo"
+  3/13 EntryNormal ""
+  Messages:
+  2->1 MsgAppResp Term:3 Log:0/13
+> 1 receiving messages
+  2->1 MsgAppResp Term:3 Log:0/13
 
 raft-state
 ----
-1: StateFollower (Voter) Term:3 Lead:0
-2: StateFollower (Voter) Term:3 Lead:0
+1: StateLeader (Voter) Term:3 Lead:1
+2: StateFollower (Voter) Term:3 Lead:1
 
 raft-log 1
 ----
 1/11 EntryNormal ""
 1/12 EntryNormal "foo"
+3/13 EntryNormal ""
 
 raft-log 2
 ----
 1/11 EntryNormal ""
+1/12 EntryNormal "foo"
+3/13 EntryNormal ""