Program: 87152
Project: 87152
Buggy source:
@Override public void notifyShare(final HttpServerRequest request,final String blogId,final UserInfos user,final JsonArray sharedArray,final String resourceUri){
  if (sharedArray != null && user != null && blogId != null && request != null && resourceUri != null) {
    QueryBuilder query=QueryBuilder.start("String_Node_Str").is(blogId);
    JsonObject keys=new JsonObject().putNumber("String_Node_Str",1);
    mongo.findOne("String_Node_Str",MongoQueryBuilder.build(query),keys,new Handler<Message<JsonObject>>(){
      @Override public void handle(      final Message<JsonObject> event){
        if ("String_Node_Str".equals(event.body().getString("String_Node_Str"))) {
          List<String> shareIds=getSharedIds(sharedArray);
          if (!shareIds.isEmpty()) {
            Map<String,Object> params=new HashMap<>();
            params.put("String_Node_Str",user.getUserId());
            neo.send(neoQuery(shareIds),params,new Handler<Message<JsonObject>>(){
              @Override public void handle(              Message<JsonObject> res){
                if ("String_Node_Str".equals(res.body().getString("String_Node_Str"))) {
                  JsonObject r=res.body().getObject("String_Node_Str");
                  List<String> recipients=new ArrayList<>();
                  for (                  String attr : r.getFieldNames()) {
                    String id=r.getObject(attr).getString("String_Node_Str");
                    if (id != null) {
                      recipients.add(id);
                    }
                  }
                  String blogTitle=event.body().getObject("String_Node_Str",new JsonObject()).getString("String_Node_Str");
                  JsonObject p=new JsonObject().putString("String_Node_Str",container.config().getString("String_Node_Str") + "String_Node_Str" + user.getUserId()+ "String_Node_Str"+ user.getType()).putString("String_Node_Str",user.getUsername()).putString("String_Node_Str",blogTitle).putString("String_Node_Str",resourceUri);
                  try {
                    notification.notifyTimeline(request,user,NOTIFICATION_TYPE,NOTIFICATION_TYPE + "String_Node_Str",recipients,blogId,"String_Node_Str",p);
                  }
 catch (                  IOException e) {
                    log.error("String_Node_Str",e);
                  }
                }
              }
            }
);
          }
        }
      }
    }
);
  }
}

Fixed version (ground truth):
@Override public void notifyShare(final HttpServerRequest request,final String blogId,final UserInfos user,final JsonArray sharedArray,final String resourceUri){
  if (sharedArray != null && user != null && blogId != null && request != null && resourceUri != null) {
    QueryBuilder query=QueryBuilder.start("String_Node_Str").is(blogId);
    JsonObject keys=new JsonObject().putNumber("String_Node_Str",1);
    mongo.findOne("String_Node_Str",MongoQueryBuilder.build(query),keys,new Handler<Message<JsonObject>>(){
      @Override public void handle(      final Message<JsonObject> event){
        if ("String_Node_Str".equals(event.body().getString("String_Node_Str"))) {
          List<String> shareIds=getSharedIds(sharedArray);
          if (!shareIds.isEmpty()) {
            Map<String,Object> params=new HashMap<>();
            params.put("String_Node_Str",user.getUserId());
            neo.send(neoQuery(shareIds),params,new Handler<Message<JsonObject>>(){
              @Override public void handle(              Message<JsonObject> res){
                if ("String_Node_Str".equals(res.body().getString("String_Node_Str"))) {
                  JsonObject r=res.body().getObject("String_Node_Str");
                  List<String> recipients=new ArrayList<>();
                  for (                  String attr : r.getFieldNames()) {
                    String id=r.getObject(attr).getString("String_Node_Str");
                    if (id != null) {
                      recipients.add(id);
                    }
                  }
                  String blogTitle=event.body().getObject("String_Node_Str",new JsonObject()).getString("String_Node_Str");
                  JsonObject p=new JsonObject().putString("String_Node_Str",container.config().getString("String_Node_Str") + "String_Node_Str" + user.getUserId()+ "String_Node_Str"+ user.getType()).putString("String_Node_Str",user.getUsername()).putString("String_Node_Str",blogTitle).putString("String_Node_Str",resourceUri);
                  notification.notifyTimeline(request,user,NOTIFICATION_TYPE,NOTIFICATION_TYPE + "String_Node_Str",recipients,blogId,"String_Node_Str",p);
                }
              }
            }
);
          }
        }
      }
    }
);
  }
}