Program: 37653
Project: 37653
Buggy source:
void onOpen(Map topologyConfig,TopologyContext topologyContext,SpoutOutputCollector spoutOutputCollector){
  if (startingTrigger != null) {
    startingTrigger.setSidelineSpout(new SpoutTriggerProxy(this));
  }
  if (stoppingTrigger != null) {
    stoppingTrigger.setSidelineSpout(new SpoutTriggerProxy(this));
  }
  fireHoseSpout=new VirtualSpout(getSpoutConfig(),getTopologyContext(),getFactoryManager(),getMetricsRecorder());
  fireHoseSpout.setVirtualSpoutId(generateVirtualSpoutId("String_Node_Str"));
  getCoordinator().addSidelineSpout(fireHoseSpout);
  final ConsumerState currentState=fireHoseSpout.getCurrentState();
  final List<SidelineRequestIdentifier> existingRequestIds=getPersistenceAdapter().listSidelineRequests();
  logger.info("String_Node_Str",existingRequestIds.size());
  for (  SidelineRequestIdentifier id : existingRequestIds) {
    final ConsumerState.ConsumerStateBuilder startingStateBuilder=ConsumerState.builder();
    final ConsumerState.ConsumerStateBuilder endingStateStateBuilder=ConsumerState.builder();
    SidelinePayload payload=null;
    for (    final TopicPartition topicPartition : currentState.getTopicPartitions()) {
      payload=getPersistenceAdapter().retrieveSidelineRequest(id,topicPartition.partition());
      if (payload == null) {
        continue;
      }
      startingStateBuilder.withPartition(topicPartition,payload.startingOffset);
      if (payload.endingOffset != null) {
        endingStateStateBuilder.withPartition(topicPartition,payload.endingOffset);
      }
    }
    if (payload == null) {
      logger.warn("String_Node_Str",id);
      continue;
    }
    if (payload.type.equals(SidelineType.START)) {
      logger.info("String_Node_Str",payload.id,payload.request.step);
      fireHoseSpout.getFilterChain().addStep(payload.id,payload.request.step);
    }
    if (payload.type.equals(SidelineType.STOP)) {
      openVirtualSpout(payload.id,payload.request.step,startingStateBuilder.build(),endingStateStateBuilder.build());
    }
  }
  if (startingTrigger != null) {
    startingTrigger.open(getSpoutConfig());
  }
 else {
    logger.warn("String_Node_Str");
  }
  if (stoppingTrigger != null) {
    stoppingTrigger.open(getSpoutConfig());
  }
 else {
    logger.warn("String_Node_Str");
  }
}

Fixed version (ground truth):
void onOpen(Map topologyConfig,TopologyContext topologyContext,SpoutOutputCollector spoutOutputCollector){
  if (startingTrigger != null) {
    startingTrigger.setSidelineSpout(new SpoutTriggerProxy(this));
  }
  if (stoppingTrigger != null) {
    stoppingTrigger.setSidelineSpout(new SpoutTriggerProxy(this));
  }
  fireHoseSpout=new VirtualSpout(getSpoutConfig(),getTopologyContext(),getFactoryManager(),getMetricsRecorder());
  fireHoseSpout.setVirtualSpoutId(generateVirtualSpoutId("String_Node_Str"));
  getCoordinator().addSidelineSpout(fireHoseSpout);
  final String topic=(String)getSpoutConfigItem(SidelineSpoutConfig.KAFKA_TOPIC);
  final List<SidelineRequestIdentifier> existingRequestIds=getPersistenceAdapter().listSidelineRequests();
  logger.info("String_Node_Str",existingRequestIds.size());
  for (  SidelineRequestIdentifier id : existingRequestIds) {
    final ConsumerState.ConsumerStateBuilder startingStateBuilder=ConsumerState.builder();
    final ConsumerState.ConsumerStateBuilder endingStateStateBuilder=ConsumerState.builder();
    SidelinePayload payload=null;
    final List<Integer> partitions=getPersistenceAdapter().listSidelineRequestPartitions(id);
    for (    final Integer partition : partitions) {
      payload=getPersistenceAdapter().retrieveSidelineRequest(id,partition);
      if (payload == null) {
        continue;
      }
      final TopicPartition topicPartition=new TopicPartition(topic,partition);
      startingStateBuilder.withPartition(topicPartition,payload.startingOffset);
      if (payload.endingOffset != null) {
        endingStateStateBuilder.withPartition(topicPartition,payload.endingOffset);
      }
    }
    if (payload == null) {
      logger.warn("String_Node_Str",id);
      continue;
    }
    if (payload.type.equals(SidelineType.START)) {
      logger.info("String_Node_Str",payload.id,payload.request.step);
      fireHoseSpout.getFilterChain().addStep(payload.id,payload.request.step);
    }
    if (payload.type.equals(SidelineType.STOP)) {
      openVirtualSpout(payload.id,payload.request.step,startingStateBuilder.build(),endingStateStateBuilder.build());
    }
  }
  if (startingTrigger != null) {
    startingTrigger.open(getSpoutConfig());
  }
 else {
    logger.warn("String_Node_Str");
  }
  if (stoppingTrigger != null) {
    stoppingTrigger.open(getSpoutConfig());
  }
 else {
    logger.warn("String_Node_Str");
  }
}