addChangeRecord(nodeRecord);
break;
case OpCode.reconfig:
zks.sessionTracker.checkSession(request.sessionId, request.getOwner());
ReconfigRequest reconfigRequest = (ReconfigRequest)record;
LeaderZooKeeperServer lzks;
try {
lzks = (LeaderZooKeeperServer)zks;
} catch (ClassCastException e) {
// standalone mode - reconfiguration currently not supported
throw new KeeperException.UnimplementedException();
}
QuorumVerifier lastSeenQV = lzks.self.getLastSeenQuorumVerifier();
// check that there's no reconfig in progress
if (lastSeenQV.getVersion()!=lzks.self.getQuorumVerifier().getVersion()) {
throw new KeeperException.ReconfigInProgress();
}
long configId = reconfigRequest.getCurConfigId();
if (configId != -1 && configId!=lzks.self.getLastSeenQuorumVerifier().getVersion()){
String msg = "Reconfiguration from version " + configId + " failed -- last seen version is " + lzks.self.getLastSeenQuorumVerifier().getVersion();
throw new KeeperException.BadVersionException(msg);
}
String newMembers = reconfigRequest.getNewMembers();
if (newMembers != null) { //non-incremental membership change
LOG.info("Non-incremental reconfig");
// Input may be delimited by either commas or newlines so convert to common newline separated format
newMembers = newMembers.replaceAll(",", "\n");
try{
Properties props = new Properties();
props.load(new StringReader(newMembers));
request.qv = QuorumPeerConfig.parseDynamicConfig(props, lzks.self.getElectionType(), true, false);
request.qv.setVersion(request.getHdr().getZxid());
} catch (IOException e) {
throw new KeeperException.BadArgumentsException(e.getMessage());
} catch (ConfigException e) {
throw new KeeperException.BadArgumentsException(e.getMessage());
}
} else { //incremental change - must be a majority quorum system
LOG.info("Incremental reconfig");
List<String> joiningServers = null;
String joiningServersString = reconfigRequest.getJoiningServers();
if (joiningServersString != null)
{
joiningServers = StringUtils.split(joiningServersString,",");
}
List<String> leavingServers = null;
String leavingServersString = reconfigRequest.getLeavingServers();
if (leavingServersString != null)
{
leavingServers = StringUtils.split(leavingServersString, ",");
}
if (!(lastSeenQV instanceof QuorumMaj)) {
String msg = "Incremental reconfiguration requested but last configuration seen has a non-majority quorum system";
LOG.warn(msg);
throw new KeeperException.BadArgumentsException(msg);
}
Map<Long, QuorumServer> nextServers = new HashMap<Long, QuorumServer>(lastSeenQV.getAllMembers());
try {
if (leavingServers != null) {
for (String leaving: leavingServers){
long sid = Long.parseLong(leaving);
nextServers.remove(sid);
}
}
if (joiningServers != null) {
for (String joiner: joiningServers){
// joiner should have the following format: server.x = server_spec;client_spec
String[] parts = StringUtils.split(joiner, "=").toArray(new String[0]);
if (parts.length != 2) {
throw new KeeperException.BadArgumentsException("Wrong format of server string");
}
// extract server id x from first part of joiner: server.x
Long sid = Long.parseLong(parts[0].substring(parts[0].lastIndexOf('.') + 1));
QuorumServer qs = new QuorumServer(sid, parts[1]);
if (qs.clientAddr == null || qs.electionAddr == null || qs.addr == null) {
throw new KeeperException.BadArgumentsException("Wrong format of server string - each server should have 3 ports specified");
}
nextServers.remove(qs.id);
nextServers.put(Long.valueOf(qs.id), qs);
}
}
} catch (ConfigException e){
throw new KeeperException.BadArgumentsException("Reconfiguration failed");
}
request.qv = new QuorumMaj(nextServers);
request.qv.setVersion(request.getHdr().getZxid());
}
if (QuorumPeerConfig.isStandaloneEnabled() && request.qv.getVotingMembers().size() < 2) {
String msg = "Reconfig failed - new configuration must include at least 2 followers";
LOG.warn(msg);
throw new KeeperException.BadArgumentsException(msg);
} else if (request.qv.getVotingMembers().size() < 1) {
String msg = "Reconfig failed - new configuration must include at least 1 follower";
LOG.warn(msg);
throw new KeeperException.BadArgumentsException(msg);
}
if (!lzks.getLeader().isQuorumSynced(request.qv)) {
String msg2 = "Reconfig failed - there must be a connected and synced quorum in new configuration";
LOG.warn(msg2);
throw new KeeperException.NewConfigNoQuorum();
}