@Override
public NewEpochResponseProto newEpoch(String jid, NamespaceInfo nsInfo,
long epoch) throws IOException {
try {
NewEpochRequestProto req = NewEpochRequestProto.newBuilder()
.setJid(convertJournalId(jid))
.setNsInfo(PBHelper.convert(nsInfo))
.setEpoch(epoch)
.build();
return rpcProxy.newEpoch(NULL_CONTROLLER, req);