Program: 116810
Project: 116810
Buggy source:
@Override public String startInstance(String clusterId,LocationScope locationScope){
  ComputeService computeService;
  Template template;
  String ip;
  String cloud=locationScope.getCloud();
  String region=locationScope.getRegion();
  final Lock lock=new ReentrantLock();
  log.info("String_Node_Str" + clusterId);
  ServiceContext serviceCtxt=dataHolder.getServiceContextFromDomain(clusterId);
  if (serviceCtxt == null) {
    String msg="String_Node_Str" + clusterId;
    log.fatal(msg);
    throw new CloudControllerException(msg);
  }
  serviceCtxt.setCartridge(loadCartridge(serviceCtxt.getCartridgeType(),dataHolder.getCartridges()));
  if (serviceCtxt.getCartridge() == null) {
    String msg="String_Node_Str" + clusterId;
    log.fatal(msg);
    throw new CloudControllerException(msg);
  }
  if (serviceCtxt.getCartridge().getIaases().isEmpty()) {
    String msg="String_Node_Str" + serviceCtxt.getCartridge().getType();
    log.fatal(msg);
    throw new CloudControllerException(msg);
  }
  for (  IaasProvider iaas : serviceCtxt.getCartridge().getIaases()) {
    if (cloud == null) {
      String msg="String_Node_Str" + clusterId + "String_Node_Str";
      log.fatal(msg);
      throw new CloudControllerException(msg);
    }
    if (region == null) {
      log.info("String_Node_Str");
    }
    if (iaas.getType().equals(cloud)) {
      IaasContext ctxt;
      if ((ctxt=serviceCtxt.getIaasContext(iaas.getType())) == null) {
        ctxt=serviceCtxt.addIaasContext(iaas.getType());
      }
      try {
        String memberID=generateMemberId(clusterId);
        serviceCtxt.getPayload().append("String_Node_Str");
        serviceCtxt.getPayload().append("String_Node_Str" + memberID);
        reloadPayload(serviceCtxt.getCartridge(),serviceCtxt.generatePayload());
        iaas.getIaas().setDynamicPayload(iaas);
        computeService=iaas.getComputeService();
        template=iaas.getTemplate();
        if (template == null) {
          String msg="String_Node_Str" + iaas.getType() + "String_Node_Str"+ "String_Node_Str"+ "String_Node_Str";
          log.error(msg);
          continue;
        }
        String str=clusterId.substring(0,10);
        String group=str.replaceAll("String_Node_Str","String_Node_Str");
        NodeMetadata node;
        Set<? extends NodeMetadata> nodes=computeService.createNodesInGroup(group,1,template);
        node=nodes.iterator().next();
        String autoAssignIpProp=iaas.getProperty(CloudControllerConstants.AUTO_ASSIGN_IP_PROPERTY);
        lock.lock();
        try {
          ip="String_Node_Str";
          if (autoAssignIpProp == null || (autoAssignIpProp != null && autoAssignIpProp.equals("String_Node_Str"))) {
            ip=iaas.getIaas().associateAddress(iaas,node);
          }
          if (ip.isEmpty() && node.getPublicAddresses() != null && node.getPublicAddresses().iterator().hasNext()) {
            ip=node.getPublicAddresses().iterator().next();
          }
          String privateIp=null;
          if (node.getPrivateAddresses() != null && node.getPrivateAddresses().iterator().hasNext()) {
            privateIp=node.getPrivateAddresses().iterator().next();
          }
          log.info("String_Node_Str" + privateIp);
          if (ip.isEmpty() && node.getPrivateAddresses() != null && node.getPrivateAddresses().iterator().hasNext()) {
            ip=node.getPrivateAddresses().iterator().next();
          }
          if (node.getId() == null) {
            String msg="String_Node_Str" + node.toString();
            log.fatal(msg);
            throw new CloudControllerException(msg);
          }
          ctxt.addNodeId(node.getId());
          ctxt.addNodeToPublicIp(node.getId(),ip);
          dataHolder.addNodeId(node.getId(),serviceCtxt);
          serviceCtxt.getCartridge().setLastlyUsedIaas(iaas);
          appendToPublicIpProperty(ip,serviceCtxt);
          dataHolder.updateActiveInstanceCount(iaas.getType(),1);
          persist();
          TopologyBuilder.handleMemberSpawned(memberID,serviceCtxt.getCartridgeType(),clusterId,node.getId(),locationScope,privateIp);
          CartridgeInstanceDataPublisherTask.publish();
          if (log.isDebugEnabled()) {
            log.debug("String_Node_Str" + node.toString() + "String_Node_Str");
          }
          log.info("String_Node_Str" + iaas.getType() + "String_Node_Str"+ ip+ "String_Node_Str"+ node.getId());
          return ip;
        }
  finally {
          lock.unlock();
        }
      }
 catch (      Exception e) {
        log.warn("String_Node_Str" + iaas.getType() + "String_Node_Str",e);
      }
    }
 else {
      if (region != null) {
        log.error("String_Node_Str" + cloud + "String_Node_Str"+ region+ "String_Node_Str"+ clusterId);
      }
    }
  }
  return null;
}

Fixed version (ground truth):
@Override() public String startInstance(String clusterId,LocationScope locationScope){
  ComputeService computeService;
  Template template;
  String ip;
  String cloud=locationScope.getCloud();
  String region=locationScope.getRegion();
  final Lock lock=new ReentrantLock();
  log.info("String_Node_Str" + clusterId);
  ServiceContext serviceCtxt=dataHolder.getServiceContextFromDomain(clusterId);
  if (serviceCtxt == null) {
    String msg="String_Node_Str" + clusterId;
    log.fatal(msg);
    throw new CloudControllerException(msg);
  }
  serviceCtxt.setCartridge(loadCartridge(serviceCtxt.getCartridgeType(),dataHolder.getCartridges()));
  if (serviceCtxt.getCartridge() == null) {
    String msg="String_Node_Str" + clusterId;
    log.fatal(msg);
    throw new CloudControllerException(msg);
  }
  if (serviceCtxt.getCartridge().getIaases().isEmpty()) {
    String msg="String_Node_Str" + serviceCtxt.getCartridge().getType();
    log.fatal(msg);
    throw new CloudControllerException(msg);
  }
  for (  IaasProvider iaas : serviceCtxt.getCartridge().getIaases()) {
    if (cloud == null) {
      String msg="String_Node_Str" + clusterId + "String_Node_Str";
      log.fatal(msg);
      throw new CloudControllerException(msg);
    }
    if (region == null) {
      log.info("String_Node_Str");
    }
    if (iaas.getType().equals(cloud)) {
      IaasContext ctxt;
      if ((ctxt=serviceCtxt.getIaasContext(iaas.getType())) == null) {
        ctxt=serviceCtxt.addIaasContext(iaas.getType());
      }
      try {
        String memberID=generateMemberId(clusterId);
        serviceCtxt.getPayload().append("String_Node_Str");
        serviceCtxt.getPayload().append("String_Node_Str" + memberID);
        reloadPayload(serviceCtxt.getCartridge(),serviceCtxt.generatePayload());
        iaas.getIaas().setDynamicPayload(iaas);
        computeService=iaas.getComputeService();
        template=iaas.getTemplate();
        if (template == null) {
          String msg="String_Node_Str" + iaas.getType() + "String_Node_Str"+ "String_Node_Str"+ "String_Node_Str";
          log.error(msg);
          continue;
        }
        String str=clusterId.substring(0,10);
        String group=str.replaceAll("String_Node_Str","String_Node_Str");
        NodeMetadata node;
        Set<? extends NodeMetadata> nodes=computeService.createNodesInGroup(group,1,template);
        node=nodes.iterator().next();
        String autoAssignIpProp=iaas.getProperty(CloudControllerConstants.AUTO_ASSIGN_IP_PROPERTY);
        lock.lock();
        try {
          ip="String_Node_Str";
          if (autoAssignIpProp == null || (autoAssignIpProp != null && autoAssignIpProp.equals("String_Node_Str"))) {
            ip=iaas.getIaas().associateAddress(iaas,node);
          }
          if (ip.isEmpty() && node.getPublicAddresses() != null && node.getPublicAddresses().iterator().hasNext()) {
            ip=node.getPublicAddresses().iterator().next();
          }
          String privateIp=null;
          if (node.getPrivateAddresses() != null && node.getPrivateAddresses().iterator().hasNext()) {
            privateIp=node.getPrivateAddresses().iterator().next();
          }
          log.info("String_Node_Str" + privateIp);
          if (ip.isEmpty() && node.getPrivateAddresses() != null && node.getPrivateAddresses().iterator().hasNext()) {
            ip=node.getPrivateAddresses().iterator().next();
          }
          if (node.getId() == null) {
            String msg="String_Node_Str" + node.toString();
            log.fatal(msg);
            throw new CloudControllerException(msg);
          }
          ctxt.addNodeId(node.getId());
          ctxt.addNodeToPublicIp(node.getId(),ip);
          dataHolder.addNodeId(node.getId(),serviceCtxt);
          serviceCtxt.getCartridge().setLastlyUsedIaas(iaas);
          appendToPublicIpProperty(ip,serviceCtxt);
          dataHolder.updateActiveInstanceCount(iaas.getType(),1);
          persist();
          TopologyBuilder.handleMemberSpawned(memberID,serviceCtxt.getCartridgeType(),clusterId,node.getId(),locationScope,privateIp);
          CartridgeInstanceDataPublisherTask.publish();
          if (log.isDebugEnabled()) {
            log.debug("String_Node_Str" + node.toString() + "String_Node_Str");
          }
          log.info("String_Node_Str" + iaas.getType() + "String_Node_Str"+ ip+ "String_Node_Str"+ node.getId());
          return ip;
        }
  finally {
          lock.unlock();
        }
      }
 catch (      Exception e) {
        log.warn("String_Node_Str" + iaas.getType() + "String_Node_Str",e);
      }
    }
 else {
      if (region != null) {
        log.error("String_Node_Str" + cloud + "String_Node_Str"+ region+ "String_Node_Str"+ clusterId);
      }
    }
  }
  return null;
}