Program: 115441
Project: 115441
Buggy source:
public static void handleMemberReadyToShutdown(InstanceReadyToShutdownEvent instanceReadyToShutdownEvent) throws InvalidMemberException, InvalidCartridgeTypeException, RegistryException {
  Topology topology=TopologyHolder.getTopology();
  Service service=topology.getService(instanceReadyToShutdownEvent.getServiceName());
  if (service == null) {
    throw new RuntimeException(String.format("String_Node_Str",instanceReadyToShutdownEvent.getServiceName()));
  }
  Cluster cluster=service.getCluster(instanceReadyToShutdownEvent.getClusterId());
  if (cluster == null) {
    throw new RuntimeException(String.format("String_Node_Str",instanceReadyToShutdownEvent.getClusterId(),instanceReadyToShutdownEvent.getServiceName()));
  }
  String applicationId=service.getCluster(instanceReadyToShutdownEvent.getClusterId()).getAppId();
  String clusterAlias=CloudControllerUtil.getAliasFromClusterId(instanceReadyToShutdownEvent.getClusterId());
  Member member=cluster.getMember(instanceReadyToShutdownEvent.getMemberId());
  if (member == null) {
    throw new RuntimeException(String.format("String_Node_Str",instanceReadyToShutdownEvent.getMemberId()));
  }
  MemberReadyToShutdownEvent memberReadyToShutdownEvent=new MemberReadyToShutdownEvent(instanceReadyToShutdownEvent.getServiceName(),instanceReadyToShutdownEvent.getClusterId(),instanceReadyToShutdownEvent.getClusterInstanceId(),instanceReadyToShutdownEvent.getMemberId(),instanceReadyToShutdownEvent.getNetworkPartitionId(),instanceReadyToShutdownEvent.getPartitionId());
  Long timestamp=null;
  try {
    TopologyHolder.acquireWriteLock();
    if (!member.isStateTransitionValid(MemberStatus.ReadyToShutDown)) {
      throw new RuntimeException("String_Node_Str" + member.getStatus() + "String_Node_Str"+ MemberStatus.ReadyToShutDown);
    }
    member.setStatus(MemberStatus.ReadyToShutDown);
    log.info("String_Node_Str");
    TopologyHolder.updateTopology(topology);
    timestamp=System.currentTimeMillis();
  }
  finally {
    TopologyHolder.releaseWriteLock();
  }
  TopologyEventPublisher.sendMemberReadyToShutdownEvent(memberReadyToShutdownEvent);
  MemberStatusPublisher memStatusPublisher=CloudControllerPublisherFactory.createMemberStatusPublisher(StatisticsPublisherType.WSO2DAS);
  if (memStatusPublisher.isEnabled()) {
    if (log.isDebugEnabled()) {
      log.debug("String_Node_Str");
    }
    memStatusPublisher.publish(timestamp,applicationId,instanceReadyToShutdownEvent.getClusterId(),clusterAlias,instanceReadyToShutdownEvent.getClusterInstanceId(),instanceReadyToShutdownEvent.getServiceName(),instanceReadyToShutdownEvent.getNetworkPartitionId(),instanceReadyToShutdownEvent.getPartitionId(),instanceReadyToShutdownEvent.getMemberId(),MemberStatus.ReadyToShutDown.toString());
  }
 else {
    log.warn("String_Node_Str");
  }
}

Fixed version (ground truth):
public static void handleMemberReadyToShutdown(InstanceReadyToShutdownEvent instanceReadyToShutdownEvent) throws InvalidMemberException, InvalidCartridgeTypeException, RegistryException {
  Topology topology=TopologyHolder.getTopology();
  Service service=topology.getService(instanceReadyToShutdownEvent.getServiceName());
  if (service == null) {
    throw new RuntimeException(String.format("String_Node_Str",instanceReadyToShutdownEvent.getServiceName()));
  }
  Cluster cluster=service.getCluster(instanceReadyToShutdownEvent.getClusterId());
  if (cluster == null) {
    throw new RuntimeException(String.format("String_Node_Str",instanceReadyToShutdownEvent.getClusterId(),instanceReadyToShutdownEvent.getServiceName()));
  }
  String applicationId=service.getCluster(instanceReadyToShutdownEvent.getClusterId()).getAppId();
  String clusterAlias=CloudControllerUtil.getAliasFromClusterId(instanceReadyToShutdownEvent.getClusterId());
  Member member=cluster.getMember(instanceReadyToShutdownEvent.getMemberId());
  if (member == null) {
    throw new RuntimeException(String.format("String_Node_Str",instanceReadyToShutdownEvent.getMemberId()));
  }
  MemberReadyToShutdownEvent memberReadyToShutdownEvent=new MemberReadyToShutdownEvent(instanceReadyToShutdownEvent.getServiceName(),instanceReadyToShutdownEvent.getClusterId(),instanceReadyToShutdownEvent.getClusterInstanceId(),instanceReadyToShutdownEvent.getMemberId(),instanceReadyToShutdownEvent.getNetworkPartitionId(),instanceReadyToShutdownEvent.getPartitionId());
  Long timestamp=null;
  try {
    TopologyHolder.acquireWriteLock();
    if (!member.isStateTransitionValid(MemberStatus.ReadyToShutDown)) {
      throw new RuntimeException("String_Node_Str" + member.getStatus() + "String_Node_Str"+ MemberStatus.ReadyToShutDown);
    }
    member.setStatus(MemberStatus.ReadyToShutDown);
    log.info("String_Node_Str");
    TopologyHolder.updateTopology(topology);
    timestamp=System.currentTimeMillis();
  }
  finally {
    TopologyHolder.releaseWriteLock();
  }
  TopologyEventPublisher.sendMemberReadyToShutdownEvent(memberReadyToShutdownEvent);
  if (memStatusPublisher.isEnabled()) {
    if (log.isDebugEnabled()) {
      log.debug("String_Node_Str");
    }
    memStatusPublisher.publish(timestamp,applicationId,instanceReadyToShutdownEvent.getClusterId(),clusterAlias,instanceReadyToShutdownEvent.getClusterInstanceId(),instanceReadyToShutdownEvent.getServiceName(),instanceReadyToShutdownEvent.getNetworkPartitionId(),instanceReadyToShutdownEvent.getPartitionId(),instanceReadyToShutdownEvent.getMemberId(),MemberStatus.ReadyToShutDown.toString());
  }
}