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400 Commits

Author SHA1 Message Date
Peter Mattis
e625400f1d raft: resume paused followers on receipt of MsgHeartbeatResp 
Previously, paused followers were resumed upon sending a MsgHearbeat.

Fixes #7037
 2016-12-20 08:22:09 -05:00
Ben Darnell
f60a5d6025 raft: Export Progress.IsPaused 
CockroachDB would like to use this method for monitoring.
 2016-12-04 13:14:08 +08:00
Vincent Lee
4401d88546 raft: add node should reset the pendingConf state 
After add node conf proposed twice with the same node id, the pending state is not reset because
the addNode returned without setting the pending state at the second
time and the pending state will always be true unless other conf changed. During this we
can not add any new node because the propose will be ignored since the
pending state is true.
 2016-11-17 15:50:13 +08:00
Ben Darnell
2f34547d39 raft: Check promotable() in MsgTimeoutNow handling 
If MsgTimeoutNow arrived after a node was removed, the node could start
and win an election, then panic in becomeLeader (see
cockroachdb/cockroach#8535)
 2016-11-07 20:02:21 +08:00
Gyu-Ho Lee
cb5c92f69b raft: do not attach term to MsgReadIndex 
Fix https://github.com/coreos/etcd/issues/6744.

MsgReadIndex, as MsgProp, is to be forwarded to leader.
So we should treat it as local message.
 2016-10-28 22:12:25 -07:00
Ben Darnell
22aa710c1f raft: Improve comments and formatting for PreVote change 2016-10-24 22:29:33 +09:00
Ben Darnell
cf93a74aa8 raft: Refactor vote handling 
Move all vote handling from the per-state step functions to the
top-level Step(). This wasn't necessary before because MsgVote would
cause us to become a follower, but MsgPreVote needs to be handled
without changing the node's current state.
 2016-10-19 19:35:21 +08:00
Ben Darnell
73cae7abd0 raft: Implement the PreVote RPC described in thesis section 9.6 
This prevents disruption when a node that has been partitioned
away rejoins the cluster.

Fixes #6522
 2016-10-19 19:35:20 +08:00
Xiang Li
cfe717e926 Merge pull request #6275 from xiang90/raft_l 
raft: support safe readonly request
 2016-09-13 01:36:04 -05:00
Xiang Li
710b14ce56 raft: support safe readonly request 
Implement raft readonly request described in raft thesis 6.4
along with the existing clock/lease based approach.
 2016-09-12 15:13:52 +08:00
Peter Mattis
4a33aa3917 raft: use a singleton global rand 
rand.NewSource creates a 4872 byte object. With a small number of raft
groups in a process this isn't a problem. With 10k raft groups we'd use
46MB for these random sources. The only usage is in
raft.resetRandomizedElectionTimeout which isn't performance critical.

Fixes #6347.
 2016-09-05 09:03:18 -04:00
Ben Darnell
a7a867c1e6 raft: Allow an election immediately after start with checkQuorum 
Previously, the checkQuorum flag required an election timeout to
expire before a node could cast its first vote. This change permits
the node to cast a vote at any time when the leader is not known,
including immediately after startup.
 2016-08-30 08:28:41 +08:00
Gyu-Ho Lee
f4141f0f51 raft: handle 'MsgTransferLeader' in follower 2016-08-10 16:24:29 -07:00
Xiang Li
5f0c122496 raft: fix getting unapplied log entries 2016-08-08 10:44:02 -07:00
Xiang Li
484f579905 raft: hide Campaign rules on applying all entries 2016-07-25 15:53:39 -07:00
Xiang Li
1c5754f02d raft: fix readindex 2016-07-19 15:00:58 -07:00
Xiang Li
7432e9fbe9 Merge pull request #5809 from swingbach/master 
raft: make leader transferring workable when quorum check is on
 2016-07-12 09:46:18 -07:00
swingbach@gmail.com
c36a40ca15 raft: introduce top-level context in message struct 2016-07-12 16:14:06 +08:00
Gyu-Ho Lee
6f3a40cb53 raft: set leader id in stepFollower 
Follower has already set its leader ID from
previous append messages from the leader, but
to be consistent,  this adds a line to set its
leader id from leader snapshot message.
 2016-07-11 16:37:31 -07:00
swingbach@gmail.com
0d9b6ba0ab raft: fix a few problems 2016-07-11 14:59:53 +08:00
Gyu-Ho Lee
c396b6aaaa raft: remove unnecessary type-cast, else-clause 2016-07-09 22:01:19 -07:00
swingbach@gmail.com
e020b2a228 raft: make leader transferring workable when quorum check is on 2016-06-29 18:24:58 +08:00
Xiang Li
5f1c763993 Merge pull request #5553 from swingbach/master 
raft: implemented read-only query when quorum check is on
 2016-06-28 12:47:43 -07:00
swingbach@gmail.com
0faae33ace raft: implemented read-only query when quorum check is on 2016-06-28 10:52:53 +08:00
Gyu-Ho Lee
33f7e7583b raft: fix comment,method name to needSnapshotAbort 
And 'maybeSnapshotAbort' does not 'unset'
the pendingSnapshot. 'resetState', which is called after this
metho, is the one that unsets pendingSnapshot. So this changes
the method name.
 2016-06-24 07:54:10 -07:00
swingbach@gmail.com
337ef64ed5 raft: implemented leader lease when quorum check is on 2016-06-02 06:17:27 +08:00
Xiang Li
910781ef5b raft: do not panic when removing all the nodes from cluster 2016-05-16 10:04:17 -07:00
Xiang Li
4d2424210f Merge pull request #5313 from xiang90/fix_raft_abort 
raft: simplify leadership transfer
 2016-05-13 09:26:01 -07:00
Gyu-Ho Lee
fe884f8209 raft: update LICENSE header 2016-05-12 20:49:15 -07:00
Xiang Li
82a6de8b69 raft: simplify leadership transfer 2016-05-10 20:03:42 -07:00
Gyu-Ho Lee
9108af9046 *: clean up from go vet, misspell 2016-04-10 23:16:56 -07:00
Xiang Li
4997ed36b4 Merge pull request #5011 from xiang90/r_c 
raft: fix issues reported by golint
 2016-04-08 11:46:12 -07:00
es-chow
ac059eb8cb raft: transfer leader feature 2016-04-08 16:56:32 +08:00
Xiang Li
1b41ee9c99 raft: fix issues reported by golint 2016-04-07 22:14:56 -07:00
Gyu-Ho Lee
6e6d64fb9b *: clean up unused vars, functions 
With help from https://github.com/dominikh/go-unused.
IsNetTimeoutError seems useful, so moved to pkg/netutil.
 2016-04-06 21:33:55 -07:00
Tamir Duberstein
68db18667a raft: correct doc comment 2016-04-06 08:43:42 -04:00
Tamir Duberstein
5250784b09 raft: use rand.Intn instead of rand.Int and mod 
This provides a better random distribution and is easier to read.
 2016-04-06 08:43:42 -04:00
Xiang Li
5d431b4782 raft: lower split vote rate 2016-04-01 12:11:03 -07:00
Peter Bourgon
aedf2c5876 raft: Config: comment wrapping @ 80col 2016-03-01 09:54:58 +01:00
Peter Bourgon
6c1b3a71db raft: clarify Heartbeat/ElectionTick comments 
Avoid other, ambiguous interpretations.
 2016-03-01 09:52:14 +01:00
Anthony Romano
c5b51946eb *: exported godoc fixups 2016-02-21 20:36:44 -08:00
Anthony Romano
20461ab11a *: fix many typos 2016-01-31 21:42:39 -08:00
Xiang Li
37290820de Merge pull request #4293 from bdarnell/bcast-after-commit 
raft: Always call bcastAppend after maybeCommit
 2016-01-27 09:58:22 -08:00
Xiang Li
6054748181 Merge pull request #4297 from ngaut/ngaut/raft-typo 
raft: typo
 2016-01-26 20:48:53 -08:00
ngaut
751ab40f44 raft: typo 2016-01-27 12:35:14 +08:00
Ben Darnell
0771d713e6 raft: Always call bcastAppend after maybeCommit 2016-01-26 16:55:47 -05:00
Ben Darnell
22925a1d2f raft: Remove redundant raft.Commit field. 
Keeping this field in sync with `raft.raftLog.committed` was
error-prone, so instead we synthesize the `HardState` on demand.

Fixes #4278.
 2016-01-26 15:18:55 -05:00
Ben Darnell
46bb2582fe raft: Call maybeCommit after removing a node. 
removeNode reduces the required quorum size, so some pending entries may
be able to commit after it is applied.

Discovered in cockroachdb/cockroach#3642
 2016-01-20 11:05:48 -04:00
davygeek
194607812c raft: follow golint notice to replace +=1 with ++ 2016-01-13 09:39:00 +08:00
ngaut
8ee232d4ec raft: Rename q() to quorum() which is more readable 2016-01-06 15:23:35 +08:00