Program: 60864
Project: 60864
Buggy source:
/** 
 * Close the previous replication sources of this peer id and open new sources to trigger the new replication state changes or new replication config changes. Here we don't need to change replication queue storage and only to enqueue all logs to the new replication source
 * @param peerId the id of the replication peer
 * @throws IOException
 */
public void refreshSources(String peerId) throws IOException {
  String terminateMessage="String_Node_Str" + peerId + "String_Node_Str";
  ReplicationPeer peer=replicationPeers.getPeer(peerId);
  ReplicationSourceInterface src=createSource(peerId,peer);
synchronized (this.latestPaths) {
    ReplicationSourceInterface toRemove=this.sources.put(peerId,src);
    if (toRemove != null) {
      LOG.info("String_Node_Str" + toRemove.getPeerId());
      toRemove.terminate(terminateMessage);
    }
    for (    SortedSet<String> walsByGroup : walsById.get(peerId).values()) {
      walsByGroup.forEach(wal -> src.enqueueLog(new Path(this.logDir,wal)));
    }
  }
  LOG.info("String_Node_Str" + src.getPeerId());
  src.startup();
  List<ReplicationSourceInterface> toStartup=new ArrayList<>();
synchronized (this.oldsources) {
    List<String> previousQueueIds=new ArrayList<>();
    for (    ReplicationSourceInterface oldSource : this.oldsources) {
      if (oldSource.getPeerId().equals(peerId)) {
        previousQueueIds.add(oldSource.getQueueId());
        oldSource.terminate(terminateMessage);
        this.oldsources.remove(oldSource);
      }
    }
    for (    String queueId : previousQueueIds) {
      ReplicationSourceInterface replicationSource=createSource(queueId,peer);
      this.oldsources.add(replicationSource);
      for (      SortedSet<String> walsByGroup : walsByIdRecoveredQueues.get(queueId).values()) {
        walsByGroup.forEach(wal -> src.enqueueLog(new Path(wal)));
      }
      toStartup.add(replicationSource);
    }
  }
  for (  ReplicationSourceInterface replicationSource : oldsources) {
    replicationSource.startup();
  }
}

Fixed version (ground truth):
/** 
 * Close the previous replication sources of this peer id and open new sources to trigger the new replication state changes or new replication config changes. Here we don't need to change replication queue storage and only to enqueue all logs to the new replication source
 * @param peerId the id of the replication peer
 * @throws IOException
 */
public void refreshSources(String peerId) throws IOException {
  String terminateMessage="String_Node_Str" + peerId + "String_Node_Str";
  ReplicationPeer peer=replicationPeers.getPeer(peerId);
  ReplicationSourceInterface src=createSource(peerId,peer);
synchronized (this.latestPaths) {
    ReplicationSourceInterface toRemove=this.sources.put(peerId,src);
    if (toRemove != null) {
      LOG.info("String_Node_Str" + toRemove.getPeerId());
      toRemove.terminate(terminateMessage);
    }
    for (    SortedSet<String> walsByGroup : walsById.get(peerId).values()) {
      walsByGroup.forEach(wal -> src.enqueueLog(new Path(this.logDir,wal)));
    }
  }
  LOG.info("String_Node_Str" + src.getPeerId());
  src.startup();
  List<ReplicationSourceInterface> toStartup=new ArrayList<>();
synchronized (this.oldsources) {
    List<String> previousQueueIds=new ArrayList<>();
    for (    ReplicationSourceInterface oldSource : this.oldsources) {
      if (oldSource.getPeerId().equals(peerId)) {
        previousQueueIds.add(oldSource.getQueueId());
        oldSource.terminate(terminateMessage);
        this.oldsources.remove(oldSource);
      }
    }
    for (    String queueId : previousQueueIds) {
      ReplicationSourceInterface replicationSource=createSource(queueId,peer);
      this.oldsources.add(replicationSource);
      for (      SortedSet<String> walsByGroup : walsByIdRecoveredQueues.get(queueId).values()) {
        walsByGroup.forEach(wal -> src.enqueueLog(new Path(wal)));
      }
      toStartup.add(replicationSource);
    }
  }
  for (  ReplicationSourceInterface replicationSource : toStartup) {
    replicationSource.startup();
  }
}