X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-akka-raft%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fraft%2Fbehaviors%2FCandidate.java;h=a59a02051a7a8e5e5563429b098de55284829871;hb=bbc8a16efdc6bfa0d742b73af3374a33a12e2a1c;hp=702417273ff586fc635ebcb65e15fa4c8bd64885;hpb=ae75f63e3b47d0a10f736bdd18fb80e6ddc504ed;p=controller.git
diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Candidate.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Candidate.java
index 702417273f..a59a02051a 100644
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Candidate.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Candidate.java
@@ -10,6 +10,7 @@ package org.opendaylight.controller.cluster.raft.behaviors;
import akka.actor.ActorRef;
import akka.actor.ActorSelection;
+import java.util.Set;
import org.opendaylight.controller.cluster.raft.RaftActorContext;
import org.opendaylight.controller.cluster.raft.RaftState;
import org.opendaylight.controller.cluster.raft.base.messages.ElectionTimeout;
@@ -19,8 +20,6 @@ import org.opendaylight.controller.cluster.raft.messages.RaftRPC;
import org.opendaylight.controller.cluster.raft.messages.RequestVote;
import org.opendaylight.controller.cluster.raft.messages.RequestVoteReply;
-import java.util.Set;
-
/**
* The behavior of a RaftActor when it is in the CandidateState
*
@@ -48,25 +47,40 @@ public class Candidate extends AbstractRaftActorBehavior {
private final Set peers;
public Candidate(RaftActorContext context) {
- super(context);
+ super(context, RaftState.Candidate);
peers = context.getPeerAddresses().keySet();
if(LOG.isDebugEnabled()) {
- LOG.debug("Election:Candidate has following peers: {}", peers);
+ LOG.debug("{}: Election: Candidate has following peers: {}", logName(), peers);
}
votesRequired = getMajorityVoteCount(peers.size());
startNewTerm();
- scheduleElection(electionDuration());
+
+ if(context.getPeerAddresses().isEmpty()){
+ actor().tell(ELECTION_TIMEOUT, actor());
+ } else {
+ scheduleElection(electionDuration());
+ }
+
+
}
@Override protected RaftActorBehavior handleAppendEntries(ActorRef sender,
AppendEntries appendEntries) {
if(LOG.isDebugEnabled()) {
- LOG.debug(appendEntries.toString());
+ LOG.debug("{}: handleAppendEntries: {}", logName(), appendEntries);
+ }
+
+ // Some other candidate for the same term became a leader and sent us an append entry
+ if(currentTerm() == appendEntries.getTerm()){
+ LOG.debug("{}: New Leader sent an append entry to Candidate for term {} will switch to Follower",
+ logName(), currentTerm());
+
+ return switchBehavior(new Follower(context));
}
return this;
@@ -79,23 +93,22 @@ public class Candidate extends AbstractRaftActorBehavior {
}
@Override protected RaftActorBehavior handleRequestVoteReply(ActorRef sender,
- RequestVoteReply requestVoteReply) {
+ RequestVoteReply requestVoteReply) {
+
+ LOG.debug("{}: handleRequestVoteReply: {}, current voteCount: {}", logName(), requestVoteReply,
+ voteCount);
if (requestVoteReply.isVoteGranted()) {
voteCount++;
}
if (voteCount >= votesRequired) {
- return switchBehavior(new Leader(context));
+ return internalSwitchBehavior(RaftState.Leader);
}
return this;
}
- @Override public RaftState state() {
- return RaftState.Candidate;
- }
-
@Override
public RaftActorBehavior handleMessage(ActorRef sender, Object originalMessage) {
@@ -106,7 +119,8 @@ public class Candidate extends AbstractRaftActorBehavior {
RaftRPC rpc = (RaftRPC) message;
if(LOG.isDebugEnabled()) {
- LOG.debug("RaftRPC message received {} my term is {}", rpc, context.getTermInformation().getCurrentTerm());
+ LOG.debug("{}: RaftRPC message received {}, my term is {}", logName(), rpc,
+ context.getTermInformation().getCurrentTerm());
}
// If RPC request or response contains term T > currentTerm:
@@ -115,11 +129,13 @@ public class Candidate extends AbstractRaftActorBehavior {
if (rpc.getTerm() > context.getTermInformation().getCurrentTerm()) {
context.getTermInformation().updateAndPersist(rpc.getTerm(), null);
- return switchBehavior(new Follower(context));
+ return internalSwitchBehavior(RaftState.Follower);
}
}
if (message instanceof ElectionTimeout) {
+ LOG.debug("{}: Received ElectionTimeout", logName());
+
if (votesRequired == 0) {
// If there are no peers then we should be a Leader
// We wait for the election timeout to occur before declare
@@ -127,7 +143,7 @@ public class Candidate extends AbstractRaftActorBehavior {
// who we do not know about (as a peer)
// to send a message to the candidate
- return switchBehavior(new Leader(context));
+ return internalSwitchBehavior(RaftState.Leader);
}
startNewTerm();
scheduleElection(electionDuration());
@@ -146,12 +162,10 @@ public class Candidate extends AbstractRaftActorBehavior {
// Increment the election term and vote for self
long currentTerm = context.getTermInformation().getCurrentTerm();
- context.getTermInformation().updateAndPersist(currentTerm + 1,
- context.getId());
+ long newTerm = currentTerm + 1;
+ context.getTermInformation().updateAndPersist(newTerm, context.getId());
- if(LOG.isDebugEnabled()) {
- LOG.debug("Starting new term {}", (currentTerm + 1));
- }
+ LOG.debug("{}: Starting new term {}", logName(), newTerm);
// Request for a vote
// TODO: Retry request for vote if replies do not arrive in a reasonable
@@ -159,17 +173,17 @@ public class Candidate extends AbstractRaftActorBehavior {
for (String peerId : peers) {
ActorSelection peerActor = context.getPeerActorSelection(peerId);
if(peerActor != null) {
- peerActor.tell(new RequestVote(
+ RequestVote requestVote = new RequestVote(
context.getTermInformation().getCurrentTerm(),
context.getId(),
context.getReplicatedLog().lastIndex(),
- context.getReplicatedLog().lastTerm()),
- context.getActor()
- );
- }
- }
+ context.getReplicatedLog().lastTerm());
+ LOG.debug("{}: Sending {} to peer {}", logName(), requestVote, peerId);
+ peerActor.tell(requestVote, context.getActor());
+ }
+ }
}
@Override public void close() throws Exception {