Program: 116061
Project: 116061
Buggy source:
public static void handleGroupInstanceTerminatedEvent(String appId,String groupId,String instanceId){
  if (log.isDebugEnabled()) {
    log.debug("String_Node_Str" + groupId + "String_Node_Str"+ appId+ "String_Node_Str"+ instanceId);
  }
  Applications applications=ApplicationHolder.getApplications();
  Application application=applications.getApplication(appId);
  if (application == null) {
    log.warn(String.format("String_Node_Str",appId));
    return;
  }
  Group group=application.getGroupRecursively(groupId);
  if (group == null) {
    log.warn(String.format("String_Node_Str",groupId));
    return;
  }
  GroupInstance context=group.getInstanceContexts(instanceId);
  GroupStatus status=GroupStatus.Terminated;
  if (context != null) {
    if (context.isStateTransitionValid(status)) {
      context.setStatus(status);
      GroupMonitor monitor=getGroupMonitor(appId,groupId);
      ApplicationMonitor applicationMonitor=AutoscalerContext.getInstance().getAppMonitor(appId);
      if (monitor != null) {
        if (monitor.hasMonitors() && applicationMonitor.isTerminating()) {
          for (          Monitor monitor1 : monitor.getAliasToActiveMonitorsMap().values()) {
            monitor1.destroy();
          }
        }
        GroupLevelNetworkPartitionContext networkPartitionContext=monitor.getNetworkPartitionContext(context.getNetworkPartitionId());
        networkPartitionContext.removeClusterGroupContext(instanceId);
        if (context.getPartitionId() != null) {
          networkPartitionContext.getPartitionCtxt(context.getPartitionId()).removeActiveInstance(context);
        }
        monitor.removeInstance(instanceId);
        group.removeInstance(instanceId);
        ApplicationHolder.persistApplication(application);
        ApplicationsEventPublisher.sendGroupInstanceTerminatedEvent(appId,groupId,instanceId);
        monitor.setStatus(status,instanceId);
      }
    }
 else {
      log.warn("String_Node_Str" + groupId + "String_Node_Str"+ instanceId+ "String_Node_Str"+ context.getStatus()+ "String_Node_Str"+ status);
    }
  }
 else {
    log.warn("String_Node_Str" + groupId + "String_Node_Str"+ instanceId);
  }
}

Fixed version (ground truth):
public static void handleGroupInstanceTerminatedEvent(String appId,String groupId,String instanceId){
  if (log.isDebugEnabled()) {
    log.debug("String_Node_Str" + groupId + "String_Node_Str"+ appId+ "String_Node_Str"+ instanceId);
  }
  Applications applications=ApplicationHolder.getApplications();
  Application application=applications.getApplication(appId);
  if (application == null) {
    log.warn(String.format("String_Node_Str",appId));
    return;
  }
  Group group=application.getGroupRecursively(groupId);
  if (group == null) {
    log.warn(String.format("String_Node_Str",groupId));
    return;
  }
  GroupInstance groupInstance=group.getInstanceContexts(instanceId);
  GroupStatus status=GroupStatus.Terminated;
  String parentId;
  if (groupInstance != null) {
    if (groupInstance.isStateTransitionValid(status)) {
      groupInstance.setStatus(status);
      parentId=groupInstance.getParentId();
      GroupMonitor monitor=getGroupMonitor(appId,groupId);
      ApplicationMonitor applicationMonitor=AutoscalerContext.getInstance().getAppMonitor(appId);
      if (monitor != null) {
        if (monitor.hasMonitors() && applicationMonitor.isTerminating()) {
          for (          Monitor monitor1 : monitor.getAliasToActiveMonitorsMap().values()) {
            monitor1.destroy();
          }
        }
        GroupLevelNetworkPartitionContext networkPartitionContext=monitor.getNetworkPartitionContext(groupInstance.getNetworkPartitionId());
        networkPartitionContext.removeClusterGroupContext(instanceId);
        if (groupInstance.getPartitionId() != null) {
          networkPartitionContext.getPartitionCtxt(groupInstance.getPartitionId()).removeActiveInstance(groupInstance);
        }
        monitor.removeInstance(instanceId);
        group.removeInstance(instanceId);
        ApplicationHolder.persistApplication(application);
        ApplicationsEventPublisher.sendGroupInstanceTerminatedEvent(appId,groupId,instanceId);
        monitor.setStatus(status,instanceId,parentId);
      }
    }
 else {
      log.warn("String_Node_Str" + groupId + "String_Node_Str"+ instanceId+ "String_Node_Str"+ groupInstance.getStatus()+ "String_Node_Str"+ status);
    }
  }
 else {
    log.warn("String_Node_Str" + groupId + "String_Node_Str"+ instanceId);
  }
}