boolean isLeader(long id) { Vote vote = getCurrentVote(); return vote != null && id == vote.getId(); } }
private boolean termPredicate(Map<InetSocketAddress, Vote> votes, long l, long zxid) { Collection<Vote> votesCast = votes.values(); int count = 0; /* * First make the views consistent. Sometimes peers will have different * zxids for a server depending on timing. */ for (Vote v : votesCast) { if ((v.getId() == l) && (v.getZxid() == zxid)) count++; } if (count > (self.getVotingView().size() / 2)) return true; else return false; }
/** * Returns the address of the node we think is the leader. */ protected QuorumServer findLeader() { QuorumServer leaderServer = null; // Find the leader by id Vote current = self.getCurrentVote(); for (QuorumServer s : self.getView().values()) { if (s.id == current.getId()) { // Ensure we have the leader's correct IP address before // attempting to connect. s.recreateSocketAddresses(); leaderServer = s; break; } } if (leaderServer == null) { LOG.warn("Couldn't find the leader with id = " + current.getId()); } return leaderServer; }
private void leaveInstance(Vote v) { if(LOG.isDebugEnabled()){ LOG.debug("About to leave FLE instance: leader={}, zxid=0x{}, my id={}, my state={}", v.getId(), Long.toHexString(v.getZxid()), self.getId(), self.getPeerState()); } recvqueue.clear(); }
private boolean termPredicate(HashMap<InetSocketAddress, Vote> votes, long l, long zxid) { Collection<Vote> votesCast = votes.values(); int count = 0; /* * First make the views consistent. Sometimes peers will have different * zxids for a server depending on timing. */ for (Vote v : votesCast) { if ((v.getId() == l) && (v.getZxid() == zxid)) count++; } if (count > (self.getVotingView().size() / 2)) return true; else return false; }
/** * Returns the address of the node we think is the leader. */ protected QuorumServer findLeader() { QuorumServer leaderServer = null; // Find the leader by id Vote current = self.getCurrentVote(); for (QuorumServer s : self.getView().values()) { if (s.id == current.getId()) { // Ensure we have the leader's correct IP address before // attempting to connect. s.recreateSocketAddresses(); leaderServer = s; break; } } if (leaderServer == null) { LOG.warn("Couldn't find the leader with id = " + current.getId()); } return leaderServer; }
private boolean updateVote(long designatedLeader, long zxid){ Vote currentVote = getCurrentVote(); if (currentVote!=null && designatedLeader != currentVote.getId()) { setCurrentVote(new Vote(designatedLeader, zxid)); reconfigFlagSet(); LOG.warn("Suggested leader: " + designatedLeader); return true; } return false; }
private void leaveInstance(Vote v) { if(LOG.isDebugEnabled()){ LOG.debug("About to leave FLE instance: leader=" + v.getId() + ", zxid=0x" + Long.toHexString(v.getZxid()) + ", my id=" + self.getId() + ", my state=" + self.getPeerState()); } recvqueue.clear(); }
private synchronized void updateServerState(){ if (!reconfigFlag) { setPeerState(ServerState.LOOKING); LOG.warn("PeerState set to LOOKING"); return; } if (getId() == getCurrentVote().getId()) { setPeerState(ServerState.LEADING); LOG.debug("PeerState set to LEADING"); } else if (getLearnerType() == LearnerType.PARTICIPANT) { setPeerState(ServerState.FOLLOWING); LOG.debug("PeerState set to FOLLOWING"); } else if (getLearnerType() == LearnerType.OBSERVER) { setPeerState(ServerState.OBSERVING); LOG.debug("PeerState set to OBSERVER"); } else { // currently shouldn't happen since there are only 2 learner types setPeerState(ServerState.LOOKING); LOG.debug("Shouldn't be here"); } reconfigFlag = false; }
LOG.info("Finished election: " + i + ", " + v.getId());
LOG.info("Finished election: " + i + ", " + v.getId()); votes[i] = v; if (v.getId() == i) { LOG.info("I'm the leader: " + i); if (lc < this.totalRounds) { election.shutdown(); Assert.assertEquals(-1, election.getVote().getId()); LOG.info("Leader " + i + " dead"); if(quora.get(v.getId()) == null) quora.put(v.getId(), new HashSet<Integer>()); quora.get(v.getId()).add(i); if(waitForQuorum(v.getId())){ synchronized(self){ if(v.getId() == i){ Assert.assertTrue("Wrong state" + peer.getPeerState(), peer.getPeerState() == ServerState.LEADING); quora.get(v.getId()).remove(i);
LOG.info("Finished election: " + i + ", " + v.getId());
public void run() { try { Vote v = null; peer.setPeerState(ServerState.LOOKING); LOG.info("Going to call leader election: {}", i); v = peer.getElectionAlg().lookForLeader(); if (v == null) { Assert.fail("Thread " + i + " got a null vote"); } /* * A real zookeeper would take care of setting the current vote. Here * we do it manually. */ peer.setCurrentVote(v); LOG.info("Finished election: {}, {}", i, v.getId()); Assert.assertTrue("State is not leading.", peer.getPeerState() == ServerState.LEADING); } catch (Exception e) { e.printStackTrace(); } LOG.info("Joining"); } }
long currentLeaderId = getCurrentVote().getId(); QuorumServer myleaderInCurQV = prevQV.getVotingMembers().get(currentLeaderId); QuorumServer myleaderInNewQV = qv.getVotingMembers().get(currentLeaderId);
Vote currentVote = getCurrentVote(); if (currentVote != null) { setCurrentVote(new Vote(currentVote.getId(), currentVote.getZxid(), currentVote.getElectionEpoch(),
LOG.info("Finished election: " + i + ", " + v.getId()); votes[i] = v;
/** * Updates leader election info to avoid inconsistencies when * a new server tries to join the ensemble. * See ZOOKEEPER-1732 for more info. */ protected void updateElectionVote(long newEpoch) { Vote currentVote = getCurrentVote(); setBCVote(currentVote); if (currentVote != null) { setCurrentVote(new Vote(currentVote.getId(), currentVote.getZxid(), currentVote.getElectionEpoch(), newEpoch, currentVote.getState())); } }
@Test public void testOutofElection() { HashMap<Long,Vote> outofelection = new HashMap<Long,Vote>(); outofelection.put(1L, new Vote(0x0, 5, ZxidUtils.makeZxid(15, 0), 0xa, 0x17, ServerState.FOLLOWING)); outofelection.put(2L, new Vote(0x0, 5, ZxidUtils.makeZxid(15, 0), 0xa, 0x17, ServerState.FOLLOWING)); outofelection.put(4L, new Vote(0x1, 5, ZxidUtils.makeZxid(15, 0), 0xa, 0x18, ServerState.FOLLOWING)); Vote vote = new Vote(0x1, 5, ZxidUtils.makeZxid(15, 0), 0xa, 0x18, ServerState.LEADING); outofelection.put(5L, vote); Notification n = new Notification(); n.version = vote.getVersion(); n.leader = vote.getId(); n.zxid = vote.getZxid(); n.electionEpoch = vote.getElectionEpoch(); n.state = vote.getState(); n.peerEpoch = vote.getPeerEpoch(); n.sid = 5L; // Set the logical clock to 1 on fle instance of server 3. fle.logicalclock.set(0x1); Assert.assertTrue("Quorum check failed", fle.getVoteTracker(outofelection, new Vote(n.version, n.leader, n.zxid, n.electionEpoch, n.peerEpoch, n.state)).hasAllQuorums()); Assert.assertTrue("Leader check failed", fle.checkLeader(outofelection, n.leader, n.electionEpoch)); } }
!v1.isSuccess()); long leaderSid = peer.getCurrentVote().getId(); long zxid = peer.getCurrentVote().getZxid(); long electionEpoch = peer.getCurrentVote().getElectionEpoch();