Program: 14520
Project: 14520
Buggy source:
private static PrivateNetworkIndex restoreNetworkIndex(final VmInfo input,final List<NetworkGroup> networks){
  PrivateNetworkIndex index=null;
  if (networks.isEmpty()) {
    LOG.warn("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ input.getGroupNames());
  }
 else {
    final EntityTransaction db=Entities.get(NetworkGroup.class);
    try {
      final NetworkGroup network=networks.get(0);
      final NetworkGroup entity=Entities.merge(network);
      ExtantNetwork exNet=null;
      if (entity.hasExtantNetwork() && entity.extantNetwork().getTag().equals(input.getNetParams().getVlan())) {
        LOG.info("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ entity.extantNetwork());
        index=entity.extantNetwork().reclaimNetworkIndex(input.getNetParams().getNetworkIndex());
      }
 else       if (entity.hasExtantNetwork() && !entity.extantNetwork().getTag().equals(input.getNetParams().getVlan())) {
        LOG.warn("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ entity.extantNetwork());
      }
 else {
        LOG.debug("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ input.getNetParams().getVlan());
        exNet=entity.reclaim(input.getNetParams().getVlan());
        LOG.info("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ entity.extantNetwork());
        LOG.debug("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ input.getNetParams().getNetworkIndex());
        index=exNet.reclaimNetworkIndex(input.getNetParams().getNetworkIndex());
      }
      db.commit();
    }
 catch (    final Exception ex) {
      Logs.exhaust().error(ex,ex);
      db.rollback();
    }
  }
  return index;
}

Fixed version (ground truth):
private static PrivateNetworkIndex restoreNetworkIndex(final VmInfo input,final List<NetworkGroup> networks){
  PrivateNetworkIndex index=null;
  if (networks.isEmpty()) {
    LOG.warn("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ input.getGroupNames());
  }
 else {
    final EntityTransaction db=Entities.get(NetworkGroup.class);
    try {
      final NetworkGroup network=networks.get(0);
      final NetworkGroup entity=Entities.merge(network);
      ExtantNetwork exNet=null;
      if (entity.hasExtantNetwork() && entity.extantNetwork().getTag().equals(input.getNetParams().getVlan())) {
        LOG.info("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ entity.extantNetwork());
        index=entity.extantNetwork().reclaimNetworkIndex(input.getNetParams().getNetworkIndex());
      }
 else       if (entity.hasExtantNetwork() && !entity.extantNetwork().getTag().equals(input.getNetParams().getVlan())) {
        LOG.warn("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ entity.extantNetwork());
      }
 else {
        LOG.debug("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ input.getNetParams().getVlan());
        exNet=entity.reclaim(input.getNetParams().getVlan());
        LOG.info("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ entity.extantNetwork());
        LOG.debug("String_Node_Str" + input.getInstanceId() + "String_Node_Str"+ input.getNetParams().getNetworkIndex());
        index=exNet.reclaimNetworkIndex(input.getNetParams().getNetworkIndex());
      }
      db.commit();
    }
 catch (    final Exception ex) {
      Logs.extreme().error(ex,ex);
      db.rollback();
    }
  }
  return index;
}