Program: 4810
Project: 4810
Buggy source:
@Override public Void call(JavaRDD<T> data,Time batchTime) throws Exception {
  final long logicalStartTime=batchTime.milliseconds();
  MacroEvaluator evaluator=new DefaultMacroEvaluator(sec.getWorkflowToken(),sec.getRuntimeArguments(),logicalStartTime,sec.getSecureStore(),sec.getNamespace());
  PluginContext pluginContext=new SparkPipelinePluginContext(sec.getPluginContext(),sec.getMetrics(),stageSpec.isStageLoggingEnabled(),stageSpec.isProcessTimingEnabled());
  final SparkBatchSinkFactory sinkFactory=new SparkBatchSinkFactory();
  final String stageName=stageSpec.getName();
  final BatchSink<Object,Object,Object> batchSink=pluginContext.newPluginInstance(stageName,evaluator);
  final PipelineRuntime pipelineRuntime=new SparkPipelineRuntime(sec,logicalStartTime);
  boolean isPrepared=false;
  boolean isDone=false;
  try {
    sec.execute(new TxRunnable(){
      @Override public void run(      DatasetContext datasetContext) throws Exception {
        SparkBatchSinkContext sinkContext=new SparkBatchSinkContext(sinkFactory,sec,datasetContext,pipelineRuntime,stageSpec);
        batchSink.prepareRun(sinkContext);
      }
    }
);
    isPrepared=true;
    PluginFunctionContext pluginFunctionContext=new PluginFunctionContext(stageSpec,sec,pipelineRuntime.getArguments().asMap(),batchTime.milliseconds());
    PairFlatMapFunc<T,Object,Object> sinkFunction=new BatchSinkFunction<T,Object,Object>(pluginFunctionContext);
    sinkFactory.writeFromRDD(data.flatMapToPair(Compat.convert(sinkFunction)),sec,stageName,Object.class,Object.class);
    isDone=true;
    sec.execute(new TxRunnable(){
      @Override public void run(      DatasetContext datasetContext) throws Exception {
        SparkBatchSinkContext sinkContext=new SparkBatchSinkContext(sinkFactory,sec,datasetContext,pipelineRuntime,stageSpec);
        batchSink.onRunFinish(true,sinkContext);
      }
    }
);
  }
 catch (  Exception e) {
    LOG.error("String_Node_Str",stageName,logicalStartTime,e);
  }
 finally {
    if (isPrepared && !isDone) {
      sec.execute(new TxRunnable(){
        @Override public void run(        DatasetContext datasetContext) throws Exception {
          SparkBatchSinkContext sinkContext=new SparkBatchSinkContext(sinkFactory,sec,datasetContext,pipelineRuntime,stageSpec);
          batchSink.onRunFinish(false,sinkContext);
        }
      }
);
    }
  }
  return null;
}

Fixed version (ground truth):
@Override public Void call(JavaRDD<T> data,Time batchTime) throws Exception {
  if (data.isEmpty()) {
    return null;
  }
  final long logicalStartTime=batchTime.milliseconds();
  MacroEvaluator evaluator=new DefaultMacroEvaluator(sec.getWorkflowToken(),sec.getRuntimeArguments(),logicalStartTime,sec.getSecureStore(),sec.getNamespace());
  PluginContext pluginContext=new SparkPipelinePluginContext(sec.getPluginContext(),sec.getMetrics(),stageSpec.isStageLoggingEnabled(),stageSpec.isProcessTimingEnabled());
  final SparkBatchSinkFactory sinkFactory=new SparkBatchSinkFactory();
  final String stageName=stageSpec.getName();
  final BatchSink<Object,Object,Object> batchSink=pluginContext.newPluginInstance(stageName,evaluator);
  final PipelineRuntime pipelineRuntime=new SparkPipelineRuntime(sec,logicalStartTime);
  boolean isPrepared=false;
  boolean isDone=false;
  try {
    sec.execute(new TxRunnable(){
      @Override public void run(      DatasetContext datasetContext) throws Exception {
        SparkBatchSinkContext sinkContext=new SparkBatchSinkContext(sinkFactory,sec,datasetContext,pipelineRuntime,stageSpec);
        batchSink.prepareRun(sinkContext);
      }
    }
);
    isPrepared=true;
    PluginFunctionContext pluginFunctionContext=new PluginFunctionContext(stageSpec,sec,pipelineRuntime.getArguments().asMap(),batchTime.milliseconds());
    PairFlatMapFunc<T,Object,Object> sinkFunction=new BatchSinkFunction<T,Object,Object>(pluginFunctionContext);
    sinkFactory.writeFromRDD(data.flatMapToPair(Compat.convert(sinkFunction)),sec,stageName,Object.class,Object.class);
    isDone=true;
    sec.execute(new TxRunnable(){
      @Override public void run(      DatasetContext datasetContext) throws Exception {
        SparkBatchSinkContext sinkContext=new SparkBatchSinkContext(sinkFactory,sec,datasetContext,pipelineRuntime,stageSpec);
        batchSink.onRunFinish(true,sinkContext);
      }
    }
);
  }
 catch (  Exception e) {
    LOG.error("String_Node_Str",stageName,logicalStartTime,e);
  }
 finally {
    if (isPrepared && !isDone) {
      sec.execute(new TxRunnable(){
        @Override public void run(        DatasetContext datasetContext) throws Exception {
          SparkBatchSinkContext sinkContext=new SparkBatchSinkContext(sinkFactory,sec,datasetContext,pipelineRuntime,stageSpec);
          batchSink.onRunFinish(false,sinkContext);
        }
      }
);
    }
  }
  return null;
}