Program: 176208
Project: 176208
Buggy source:
/** 
 * Read a record from the database. Each field/value pair from the result will be stored in a HashMap.
 * @param table The name of the table
 * @param key The record key of the record to read.
 * @param fields The list of fields to read, or null for all of them
 * @param result A HashMap of field/value pairs for the result
 * @return Zero on success, a non-zero error code on error
 */
public int read(String table,String key,Set<String> fields,HashMap<String,ByteIterator> result){
  try {
    if (_hTable == null) {
      getHTable(_table);
    }
  }
 catch (  IOException e) {
    System.err.println("String_Node_Str" + e);
    return ServerError;
  }
  Result r=null;
  try {
    if (_debug) {
      System.out.println("String_Node_Str" + _columnFamily);
      System.out.println("String_Node_Str" + key);
    }
    Get g=new Get(Bytes.toBytes(key));
    if (fields == null) {
      g.addFamily(_columnFamilyBytes);
    }
 else {
      for (      String field : fields) {
        g.addColumn(_columnFamilyBytes,Bytes.toBytes(field));
      }
    }
    r=_hTable.get(g);
  }
 catch (  IOException e) {
    System.err.println("String_Node_Str" + e);
    return ServerError;
  }
catch (  ConcurrentModificationException e) {
    return ServerError;
  }
  for (  KeyValue kv : r.list()) {
    result.put(Bytes.toString(kv.getQualifier()),new ByteArrayByteIterator(kv.getValue()));
    if (_debug) {
      System.out.println("String_Node_Str" + Bytes.toString(kv.getQualifier()) + "String_Node_Str"+ Bytes.toString(kv.getValue()));
    }
  }
  return Ok;
}

Fixed version (ground truth):
/** 
 * Read a record from the database. Each field/value pair from the result will be stored in a HashMap.
 * @param table The name of the table
 * @param key The record key of the record to read.
 * @param fields The list of fields to read, or null for all of them
 * @param result A HashMap of field/value pairs for the result
 * @return Zero on success, a non-zero error code on error
 */
public int read(String table,String key,Set<String> fields,HashMap<String,ByteIterator> result){
  try {
    if (_hTable == null) {
      getHTable(_table);
    }
  }
 catch (  IOException e) {
    System.err.println("String_Node_Str" + e);
    return ServerError;
  }
  Result r=null;
  try {
    if (_debug) {
      System.out.println("String_Node_Str" + _columnFamily);
      System.out.println("String_Node_Str" + key);
    }
    Get g=new Get(Bytes.toBytes(key));
    if (fields == null) {
      g.addFamily(_columnFamilyBytes);
    }
 else {
      for (      String field : fields) {
        g.addColumn(_columnFamilyBytes,Bytes.toBytes(field));
      }
    }
    r=_hTable.get(g);
  }
 catch (  IOException e) {
    System.err.println("String_Node_Str" + e);
    return ServerError;
  }
catch (  ConcurrentModificationException e) {
    return ServerError;
  }
  for (  KeyValue kv : r.raw()) {
    result.put(Bytes.toString(kv.getQualifier()),new ByteArrayByteIterator(kv.getValue()));
    if (_debug) {
      System.out.println("String_Node_Str" + Bytes.toString(kv.getQualifier()) + "String_Node_Str"+ Bytes.toString(kv.getValue()));
    }
  }
  return Ok;
}