Github user jerryshao commented on the pull request:
https://github.com/apache/spark/pull/4149#issuecomment-70962102
Thanks @tdas for your refactoring, I think we should fix this #4032
accordingly, otherwise we will still meet such kind of error when recovering
from failure according to my test of your branch:
```
Exception in thread "main" org.apache.spark.SparkException: Job aborted due
to stage failure: Task 0 in stage 73.0 failed 1 times, most recent failure:
Lost task 0.0 in stage 73.0 (TID 166, localhost):
java.io.FileNotFoundException:
file:/home/jerryshao/project/apache-spark/checkpoint-wal-test/receivedData/0/log-1421893625401-1421893685401
at
org.apache.hadoop.fs.RawLocalFileSystem.open(RawLocalFileSystem.java:175)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:427)
at
org.apache.spark.streaming.util.HdfsUtils$.getInputStream(HdfsUtils.scala:45)
at
org.apache.spark.streaming.util.WriteAheadLogRandomReader.<init>(WriteAheadLogRandomReader.scala:32)
at
org.apache.spark.streaming.rdd.WriteAheadLogBackedBlockRDD.compute(WriteAheadLogBackedBlockRDD.scala:99)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:264)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:231)
at
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:264)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:231)
at
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:264)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:231)
at
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:264)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:231)
at
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:68)
at
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
at org.apache.spark.scheduler.Task.run(Task.scala:56)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:183)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
```
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