Program: 115443
Project: 115443
Buggy source:
public static void handleMemberStarted(InstanceStartedEvent instanceStartedEvent){
  try {
    Topology topology=TopologyHolder.getTopology();
    Service service=topology.getService(instanceStartedEvent.getServiceName());
    if (service == null) {
      throw new RuntimeException(String.format("String_Node_Str",instanceStartedEvent.getServiceName()));
    }
    if (!service.clusterExists(instanceStartedEvent.getClusterId())) {
      throw new RuntimeException(String.format("String_Node_Str",instanceStartedEvent.getClusterId(),instanceStartedEvent.getServiceName()));
    }
    String applicationId=service.getCluster(instanceStartedEvent.getClusterId()).getAppId();
    String clusterAlias=CloudControllerUtil.getAliasFromClusterId(instanceStartedEvent.getClusterId());
    Cluster cluster=service.getCluster(instanceStartedEvent.getClusterId());
    Member member=cluster.getMember(instanceStartedEvent.getMemberId());
    if (member == null) {
      throw new RuntimeException(String.format("String_Node_Str",instanceStartedEvent.getMemberId()));
    }
    try {
      TopologyHolder.acquireWriteLock();
      if (!member.isStateTransitionValid(MemberStatus.Starting)) {
        log.error("String_Node_Str" + member.getStatus() + "String_Node_Str"+ MemberStatus.Starting);
      }
 else {
        member.setStatus(MemberStatus.Starting);
        log.info("String_Node_Str");
        TopologyHolder.updateTopology(topology);
        Long timestamp=System.currentTimeMillis();
        TopologyEventPublisher.sendMemberStartedEvent(instanceStartedEvent);
        MemberStatusPublisher memStatusPublisher=CloudControllerPublisherFactory.createMemberStatusPublisher(StatisticsPublisherType.WSO2DAS);
        if (memStatusPublisher.isEnabled()) {
          if (log.isDebugEnabled()) {
            log.debug("String_Node_Str");
          }
          memStatusPublisher.publish(timestamp,applicationId,instanceStartedEvent.getClusterId(),clusterAlias,instanceStartedEvent.getClusterInstanceId(),instanceStartedEvent.getServiceName(),instanceStartedEvent.getNetworkPartitionId(),instanceStartedEvent.getPartitionId(),instanceStartedEvent.getMemberId(),MemberStatus.Starting.toString());
        }
 else {
          log.warn("String_Node_Str");
        }
      }
    }
  finally {
      TopologyHolder.releaseWriteLock();
    }
  }
 catch (  Exception e) {
    String message=String.format("String_Node_Str" + "String_Node_Str",instanceStartedEvent.getApplicationId(),instanceStartedEvent.getServiceName(),instanceStartedEvent.getMemberId());
    log.warn(message,e);
  }
}

Fixed version (ground truth):
public static void handleMemberStarted(InstanceStartedEvent instanceStartedEvent){
  try {
    Topology topology=TopologyHolder.getTopology();
    Service service=topology.getService(instanceStartedEvent.getServiceName());
    if (service == null) {
      throw new RuntimeException(String.format("String_Node_Str",instanceStartedEvent.getServiceName()));
    }
    if (!service.clusterExists(instanceStartedEvent.getClusterId())) {
      throw new RuntimeException(String.format("String_Node_Str",instanceStartedEvent.getClusterId(),instanceStartedEvent.getServiceName()));
    }
    String applicationId=service.getCluster(instanceStartedEvent.getClusterId()).getAppId();
    String clusterAlias=CloudControllerUtil.getAliasFromClusterId(instanceStartedEvent.getClusterId());
    Cluster cluster=service.getCluster(instanceStartedEvent.getClusterId());
    Member member=cluster.getMember(instanceStartedEvent.getMemberId());
    if (member == null) {
      throw new RuntimeException(String.format("String_Node_Str",instanceStartedEvent.getMemberId()));
    }
    try {
      TopologyHolder.acquireWriteLock();
      if (!member.isStateTransitionValid(MemberStatus.Starting)) {
        log.error("String_Node_Str" + member.getStatus() + "String_Node_Str"+ MemberStatus.Starting);
      }
 else {
        member.setStatus(MemberStatus.Starting);
        log.info("String_Node_Str");
        TopologyHolder.updateTopology(topology);
        Long timestamp=System.currentTimeMillis();
        TopologyEventPublisher.sendMemberStartedEvent(instanceStartedEvent);
        if (memStatusPublisher.isEnabled()) {
          if (log.isDebugEnabled()) {
            log.debug("String_Node_Str");
          }
          memStatusPublisher.publish(timestamp,applicationId,instanceStartedEvent.getClusterId(),clusterAlias,instanceStartedEvent.getClusterInstanceId(),instanceStartedEvent.getServiceName(),instanceStartedEvent.getNetworkPartitionId(),instanceStartedEvent.getPartitionId(),instanceStartedEvent.getMemberId(),MemberStatus.Starting.toString());
        }
      }
    }
  finally {
      TopologyHolder.releaseWriteLock();
    }
  }
 catch (  Exception e) {
    String message=String.format("String_Node_Str" + "String_Node_Str",instanceStartedEvent.getApplicationId(),instanceStartedEvent.getServiceName(),instanceStartedEvent.getMemberId());
    log.warn(message,e);
  }
}