title: Recoverable Kafka WordCount : Could not compute split, block input-0-1449191870000 not found
body: <p>spark RecoverableKafkaWordCount several minutes , when I restart throw this exception:</p>
  
  <pre><code>15/12/04 15:27:27 WARN [task-result-getter-0] TaskSetManager: Lost task 0.0 in stage 3.0 (TID 56, 192.168.0.2): java.lang.Exception: Could not compute split, block input-0-1449191870000 not found
      at org.apache.spark.rdd.BlockRDD.compute(BlockRDD.scala:51)
      at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:277)
      at org.apache.spark.rdd.RDD.iterator(RDD.scala:244)
      at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
      at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:277)
      at org.apache.spark.rdd.RDD.iterator(RDD.scala:244)
      at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
      at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:277)
      at org.apache.spark.rdd.RDD.iterator(RDD.scala:244)
      at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:70)
      at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
      at org.apache.spark.scheduler.Task.run(Task.scala:70)
      at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:213)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      at java.lang.Thread.run(Thread.java:745)
  </code></pre>