Program: 115995
Project: 115995
Buggy source:
public static void handleMemberActivated(InstanceActivatedEvent instanceActivatedEvent){
  Topology topology=TopologyManager.getTopology();
  Service service=topology.getService(instanceActivatedEvent.getServiceName());
  if (service == null) {
    log.warn(String.format("String_Node_Str",instanceActivatedEvent.getServiceName()));
    return;
  }
  Cluster cluster=service.getCluster(instanceActivatedEvent.getClusterId());
  if (cluster == null) {
    log.warn(String.format("String_Node_Str",instanceActivatedEvent.getClusterId()));
    return;
  }
  Member member=cluster.getMember(instanceActivatedEvent.getMemberId());
  if (member == null) {
    log.warn(String.format("String_Node_Str",instanceActivatedEvent.getMemberId()));
    return;
  }
  MemberActivatedEvent memberActivatedEvent=new MemberActivatedEvent(instanceActivatedEvent.getServiceName(),instanceActivatedEvent.getClusterId(),instanceActivatedEvent.getClusterInstanceId(),instanceActivatedEvent.getMemberId(),instanceActivatedEvent.getNetworkPartitionId(),instanceActivatedEvent.getPartitionId());
  memberActivatedEvent.setApplicationId(null);
  try {
    TopologyManager.acquireWriteLock();
    if (!member.isStateTransitionValid(MemberStatus.Active)) {
      log.error("String_Node_Str" + member.getStatus() + "String_Node_Str"+ MemberStatus.Active);
      return;
    }
 else {
      member.setStatus(MemberStatus.Active);
      log.info("String_Node_Str");
      Cartridge cartridge=CloudControllerContext.getInstance().getCartridge(instanceActivatedEvent.getServiceName());
      List<PortMapping> portMappings=cartridge.getPortMappings();
      Port port;
      for (      PortMapping portMapping : portMappings) {
        port=new Port(portMapping.getProtocol(),Integer.parseInt(portMapping.getPort()),Integer.parseInt(portMapping.getProxyPort()));
        member.addPort(port);
        memberActivatedEvent.addPort(port);
      }
      memberActivatedEvent.setDefaultPrivateIP(member.getDefaultPrivateIP());
      memberActivatedEvent.setMemberPrivateIPs(member.getMemberPrivateIPs());
      memberActivatedEvent.setDefaultPublicIP(member.getDefaultPublicIP());
      memberActivatedEvent.setMemberPublicIPs(member.getMemberPublicIPs());
      TopologyManager.updateTopology(topology);
      TopologyEventPublisher.sendMemberActivatedEvent(memberActivatedEvent);
      StatisticsDataPublisher.publish(memberActivatedEvent.getMemberId(),memberActivatedEvent.getPartitionId(),memberActivatedEvent.getNetworkPartitionId(),memberActivatedEvent.getClusterId(),memberActivatedEvent.getServiceName(),MemberStatus.Active.toString(),null);
    }
  }
  finally {
    TopologyManager.releaseWriteLock();
  }
}

Fixed version (ground truth):
public static void handleMemberActivated(InstanceActivatedEvent instanceActivatedEvent){
  Topology topology=TopologyManager.getTopology();
  Service service=topology.getService(instanceActivatedEvent.getServiceName());
  if (service == null) {
    log.warn(String.format("String_Node_Str",instanceActivatedEvent.getServiceName()));
    return;
  }
  Cluster cluster=service.getCluster(instanceActivatedEvent.getClusterId());
  if (cluster == null) {
    log.warn(String.format("String_Node_Str",instanceActivatedEvent.getClusterId()));
    return;
  }
  Member member=cluster.getMember(instanceActivatedEvent.getMemberId());
  if (member == null) {
    log.warn(String.format("String_Node_Str",instanceActivatedEvent.getMemberId()));
    return;
  }
  MemberActivatedEvent memberActivatedEvent=new MemberActivatedEvent(instanceActivatedEvent.getServiceName(),instanceActivatedEvent.getClusterId(),instanceActivatedEvent.getClusterInstanceId(),instanceActivatedEvent.getMemberId(),instanceActivatedEvent.getNetworkPartitionId(),instanceActivatedEvent.getPartitionId());
  memberActivatedEvent.setApplicationId(null);
  try {
    TopologyManager.acquireWriteLock();
    if (!member.isStateTransitionValid(MemberStatus.Active)) {
      log.error("String_Node_Str" + member.getStatus() + "String_Node_Str"+ MemberStatus.Active);
      return;
    }
 else {
      member.setStatus(MemberStatus.Active);
      log.info("String_Node_Str");
      Cartridge cartridge=CloudControllerContext.getInstance().getCartridge(instanceActivatedEvent.getServiceName());
      List<PortMapping> portMappings=cartridge.getPortMappings();
      Port port;
      for (      PortMapping portMapping : portMappings) {
        port=new Port(portMapping.getProtocol(),portMapping.getPort(),portMapping.getProxyPort());
        member.addPort(port);
        memberActivatedEvent.addPort(port);
      }
      memberActivatedEvent.setDefaultPrivateIP(member.getDefaultPrivateIP());
      memberActivatedEvent.setMemberPrivateIPs(member.getMemberPrivateIPs());
      memberActivatedEvent.setDefaultPublicIP(member.getDefaultPublicIP());
      memberActivatedEvent.setMemberPublicIPs(member.getMemberPublicIPs());
      TopologyManager.updateTopology(topology);
      TopologyEventPublisher.sendMemberActivatedEvent(memberActivatedEvent);
      StatisticsDataPublisher.publish(memberActivatedEvent.getMemberId(),memberActivatedEvent.getPartitionId(),memberActivatedEvent.getNetworkPartitionId(),memberActivatedEvent.getClusterId(),memberActivatedEvent.getServiceName(),MemberStatus.Active.toString(),null);
    }
  }
  finally {
    TopologyManager.releaseWriteLock();
  }
}