public void loadConfiguration() {
        final LogEntryIterator confIterator = this.confDB.iterator(this.logEntryDecoder);
        LogEntry entry;
        while ((entry = confIterator.next()) != null) {
            if (entry.getType() == EntryType.ENTRY_TYPE_CONFIGURATION) {
                final ConfigurationEntry confEntry = new ConfigurationEntry();
                confEntry.setId(new LogId(entry.getId().getIndex(), entry.getId().getTerm()));
                confEntry.setConf(new Configuration(entry.getPeers(), entry.getLearners()));
                if (entry.getOldPeers() != null) {
                    confEntry.setOldConf(new Configuration(entry.getOldPeers(), entry.getOldLearners()));
                }
                if (this.configurationManager != null) {
                    this.configurationManager.add(confEntry);
                }
            }
        }
    }
Load configuration logEntries in confDB to configurationManager
jraft-extension/java-log-storage-impl/src/main/java/com/alipay/sofa/jraft/storage/LogitLogStorage.java